{"id":16385,"date":"2026-03-18T09:25:35","date_gmt":"2026-03-18T09:25:35","guid":{"rendered":"http:\/\/quartz-grinding.com\/?p=16385"},"modified":"2026-03-18T09:25:38","modified_gmt":"2026-03-18T09:25:38","slug":"electronic-grade-fused-silica-powder-the-complete-production-process-from-melting-to-final-classification","status":"publish","type":"post","link":"https:\/\/www.quartz-grinding.com\/vi\/electronic-grade-fused-silica-powder-the-complete-production-process-from-melting-to-final-classification\/","title":{"rendered":"B\u1ed9t silica nung ch\u1ea3y d\u00f9ng trong ng\u00e0nh \u0111i\u1ec7n t\u1eed: Quy tr\u00ecnh s\u1ea3n xu\u1ea5t ho\u00e0n ch\u1ec9nh t\u1eeb n\u1ea5u ch\u1ea3y \u0111\u1ebfn ph\u00e2n lo\u1ea1i cu\u1ed1i c\u00f9ng."},"content":{"rendered":"

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u1ea5t \u0111\u1ed9n silica c\u00f4ng nghi\u1ec7p $5\/kg v\u00e0 ch\u1ea5t \u0111\u1ed9n silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed $50\/kg kh\u00f4ng n\u1eb1m \u1edf nguy\u00ean li\u1ec7u th\u00f4, m\u00e0 l\u00e0 \u1edf quy tr\u00ecnh s\u1ea3n xu\u1ea5t. C\u1ea3 hai \u0111\u1ec1u b\u1eaft \u0111\u1ea7u t\u1eeb th\u1ea1ch anh c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao. \u0110i\u1ec1u l\u00e0m n\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh l\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a t\u1eebng b\u01b0\u1edbc t\u1eeb m\u1ecf khai th\u00e1c \u0111\u1ebfn bao b\u00ec s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng. \u0110\u00f3 l\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n nung ch\u1ea3y, c\u00f4ng ngh\u1ec7 nghi\u1ec1n, \u0111\u1ed9 ch\u00ednh x\u00e1c ph\u00e2n lo\u1ea1i v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p ki\u1ec3m so\u00e1t \u00f4 nhi\u1ec5m \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u1edf m\u1ed7i giai \u0111o\u1ea1n.<\/p>\n\n\n\n

Silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed l\u00e0 ch\u1ea5t \u0111\u1ed9n ch\u00ednh trong c\u00e1c h\u1ee3p ch\u1ea5t \u0111\u00fac epoxy b\u00e1n d\u1eabn v\u00e0 c\u00e1c t\u1ea5m gh\u00e9p PCB. M\u1ed9t h\u1ea1t qu\u00e1 l\u1edbn c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng l\u1ec7ch d\u00e2y trong qu\u00e1 tr\u00ecnh \u0111\u00fac ho\u1eb7c m\u1ea5t t\u00edn hi\u1ec7u \u1edf t\u1ea7n s\u1ed1 28 GHz. Quy tr\u00ecnh s\u1ea3n xu\u1ea5t ph\u1ea3i ng\u0103n ng\u1eeba c\u1ea3 hai l\u1ed7i n\u00e0y m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n, t\u1eeb l\u00f4 n\u00e0y sang l\u00f4 kh\u00e1c. B\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn chu\u1ed7i s\u1ea3n xu\u1ea5t b\u1ea3y giai \u0111o\u1ea1n: l\u1ef1a ch\u1ecdn nguy\u00ean li\u1ec7u th\u00f4, n\u1ea5u ch\u1ea3y, nghi\u1ec1n, ph\u00e2n lo\u1ea1i, x\u1eed l\u00fd b\u1ec1 m\u1eb7t v\u00e0 ki\u1ec3m so\u00e1t \u00f4 nhi\u1ec5m. M\u1ed7i giai \u0111o\u1ea1n c\u00f3 c\u00e1c th\u00f4ng s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee5 th\u1ec3 quy\u1ebft \u0111\u1ecbnh li\u1ec7u s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng c\u00f3 \u0111\u00e1p \u1ee9ng c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt m\u00e0 c\u00e1c k\u1ef9 s\u01b0 \u0111\u00f3ng g\u00f3i b\u00e1n d\u1eabn y\u00eau c\u1ea7u hay kh\u00f4ng.<\/p>\n\n\n\n

\"\"
B\u1ed9t silica nung ch\u1ea3y<\/figcaption><\/figure>\n\n\n\n

\u0110i\u1ec1u g\u00ec l\u00e0m cho silica nung ch\u1ea3y tr\u1edf th\u00e0nh "lo\u1ea1i d\u00f9ng trong \u0111i\u1ec7n t\u1eed" \u2014 Ng\u01b0\u1ee1ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/h2>\n\n\n\n

Silica nung ch\u1ea3y l\u00e0 silicon dioxide v\u00f4 \u0111\u1ecbnh h\u00ecnh \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng c\u00e1ch nung ch\u1ea3y th\u1ea1ch anh tinh th\u1ec3 c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao \u1edf nhi\u1ec7t \u0111\u1ed9 tr\u00ean 1.720\u00b0C. Qu\u00e1 tr\u00ecnh nung ch\u1ea3y bi\u1ebfn \u0111\u1ed5i th\u1ea1ch anh tinh th\u1ec3 th\u00e0nh m\u1ed9t m\u1ea1ng l\u01b0\u1edbi th\u1ee7y tinh kh\u00f4ng tr\u1eadt t\u1ef1\u2014t\u1ea1o ra silica nung ch\u1ea3y v\u00f4 \u0111\u1ecbnh h\u00ecnh. C\u1ea5u tr\u00fac v\u00f4 \u0111\u1ecbnh h\u00ecnh n\u00e0y mang l\u1ea1i cho silica nung ch\u1ea3y h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t (CTE) c\u1ef1c th\u1ea5p (0,5 ppm\/\u00b0C so v\u1edbi 12-17 ppm\/\u00b0C c\u1ee7a nh\u1ef1a epoxy). CTE th\u1ea5p l\u00e0m cho n\u00f3 c\u00f3 gi\u00e1 tr\u1ecb trong bao b\u00ec b\u00e1n d\u1eabn b\u1eb1ng c\u00e1ch ph\u00f9 h\u1ee3p v\u1edbi t\u1ed1c \u0111\u1ed9 gi\u00e3n n\u1edf c\u1ee7a silicon. N\u00f3 l\u00e0m gi\u1ea3m \u1ee9ng su\u1ea5t nhi\u1ec7t c\u01a1 h\u1ecdc trong qu\u00e1 tr\u00ecnh h\u00e0n ch\u1ea3y v\u00e0 chu k\u1ef3 nhi\u1ec7t. Nh\u01b0ng 'silica nung ch\u1ea3y' bao g\u1ed3m m\u1ed9t lo\u1ea1t c\u00e1c s\u1ea3n ph\u1ea9m. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa \u0111\u1ed9 tinh khi\u1ebft h\u00f3a h\u1ecdc, th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt k\u00edch th\u01b0\u1edbc h\u1ea1t v\u00e0 h\u00e0m l\u01b0\u1ee3ng v\u00f4 \u0111\u1ecbnh h\u00ecnh x\u00e1c \u0111\u1ecbnh silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed\u2014nh\u1eefng y\u00eau c\u1ea7u m\u00e0 h\u1ea7u h\u1ebft silica nung ch\u1ea3y c\u00f4ng nghi\u1ec7p kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n

\u0110\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt<\/strong><\/td>Ti\u00eau chu\u1ea9n EMC<\/strong><\/td>Ch\u00e2n ti\u1ebfp x\u00fac nh\u1ecf \/ Lo\u1ea1i BGA<\/strong><\/td>Si\u00eau m\u1ecbn \/ Lo\u1ea1i WLP<\/strong><\/td><\/tr>
D50 (k\u00edch th\u01b0\u1edbc trung b\u00ecnh)<\/td>5\u201310 \u03bcm<\/td>3\u20136 \u03bcm<\/td>1\u20133 \u03bcm<\/td><\/tr>
D97 \/ D98 t\u1ed1i \u0111a<\/td><25 \u03bcm<\/td><15 \u03bcm<\/td><8 \u03bcm<\/td><\/tr>
Dmax (gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i tuy\u1ec7t \u0111\u1ed1i)<\/td><45 \u03bcm<\/td><25 \u03bcm<\/td><12 \u03bcm<\/td><\/tr>
\u0110\u1ed9 tinh khi\u1ebft c\u1ee7a SiO2 (t\u1ed1i thi\u1ec3u)<\/td>99.9%<\/td>99.95%<\/td>99.97%<\/td><\/tr>
N\u1ed9i dung v\u00f4 \u0111\u1ecbnh h\u00ecnh<\/td>\u226599%<\/td>\u226599,5%<\/td>\u226599,9%<\/td><\/tr>
Fe2O3 t\u1ed1i \u0111a<\/td><30 ppm<\/td><10 ppm<\/td><5 ppm<\/td><\/tr>
U + Th (ph\u00f3ng x\u1ea1)<\/td><1 ppb m\u1ed7i lo\u1ea1i<\/td><0,5 ppb m\u1ed7i lo\u1ea1i<\/td><0,2 ppb m\u1ed7i lo\u1ea1i<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u00f3 th\u1ec3 kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o kh\u00e1ch h\u00e0ng v\u00e0 \u1ee9ng d\u1ee5ng. C\u00e1c th\u00f4ng s\u1ed1 tr\u00ean th\u1ec3 hi\u1ec7n ph\u1ea1m vi th\u00f4ng th\u01b0\u1eddng trong ng\u00e0nh. Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t pin ho\u1eb7c nh\u00e0 \u0111\u00f3ng g\u00f3i tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t.<\/em><\/p>\n\n\n\n

Hai th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt trong b\u1ea3ng n\u00e0y c\u1ea7n \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch. Gi\u1edbi h\u1ea1n ph\u00f3ng x\u1ea1 U v\u00e0 Th ng\u0103n ng\u1eeba c\u00e1c l\u1ed7i m\u1ec1m do h\u1ea1t alpha g\u00e2y ra trong DRAM v\u00e0 c\u00e1c thi\u1ebft b\u1ecb logic. Nh\u1eefng s\u1ef1 c\u1ed1 \u0111\u01a1n l\u1ebb n\u00e0y g\u00e2y ra c\u00e1c l\u1ed7i \u0111\u1ed9 tin c\u1eady kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y trong th\u1ef1c t\u1ebf. Vi\u1ec7c s\u00e0ng l\u1ecdc ph\u00f3ng x\u1ea1 c\u1ee7a ch\u1ea5t \u0111\u1ed9n silica nung ch\u1ea3y hi\u1ec7n l\u00e0 ti\u00eau chu\u1ea9n cho bao b\u00ec b\u1ed9 nh\u1edb. V\u00ec l\u00fd do s\u1ee9c kh\u1ecfe v\u00e0 hi\u1ec7u su\u1ea5t, h\u00e0m l\u01b0\u1ee3ng v\u00f4 \u0111\u1ecbnh h\u00ecnh ph\u1ea3i \u226599%. Th\u1ea1ch anh tinh th\u1ec3 c\u00f2n s\u00f3t l\u1ea1i l\u00e0 ch\u1ea5t g\u00e2y ung th\u01b0 khi h\u00edt ph\u1ea3i. T\u00ednh ch\u1ea5t \u0111i\u1ec7n m\u00f4i c\u1ee7a n\u00f3 c\u0169ng kh\u00e1c v\u1edbi SiO\u2082 v\u00f4 \u0111\u1ecbnh h\u00ecnh, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u t\u1ea7n s\u1ed1 cao.<\/p>\n\n\n\n

Giai \u0111o\u1ea1n 1 \u2014 L\u1ef1a ch\u1ecdn nguy\u00ean li\u1ec7u th\u00f4<\/h2>\n\n\n\n

M\u1ee9c ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1i \u0111a c\u1ee7a s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u1edf \u0111\u00e2y. Kh\u00f4ng c\u00f3 b\u01b0\u1edbc x\u1eed l\u00fd n\u00e0o sau \u0111\u00f3 c\u00f3 th\u1ec3 n\u00e2ng cao \u0111\u1ed9 tinh khi\u1ebft h\u01a1n m\u1ee9c m\u00e0 nguy\u00ean li\u1ec7u th\u00f4 cung c\u1ea5p \u2014 n\u00f3 ch\u1ec9 c\u00f3 th\u1ec3 duy tr\u00ec ho\u1eb7c l\u00e0m gi\u1ea3m \u0111\u1ed9 tinh khi\u1ebft \u0111\u00f3. H\u1ea7u h\u1ebft c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t silica nung ch\u1ea3y d\u00f9ng trong ng\u00e0nh \u0111i\u1ec7n t\u1eed \u0111\u1ec1u s\u1eed d\u1ee5ng th\u1ea1ch anh m\u1ea1ch c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao: SiO\u2082 th\u01b0\u1eddng \u0111\u1ea1t 99,5\u201399,91% TP3T, \u0111\u01b0\u1ee3c khai th\u00e1c t\u1eeb c\u00e1c m\u1ecf c\u00f3 c\u1ea5u tr\u00fac tinh th\u1ec3 \u0111\u1ee7 l\u1edbn \u0111\u1ec3 cho ph\u00e9p t\u00e1ch v\u1eadt l\u00fd c\u00e1c kho\u00e1ng ch\u1ea5t t\u1ea1p ch\u1ea5t.<\/p>\n\n\n\n

Th\u1ea1ch anh t\u1ef1 nhi\u00ean so v\u1edbi ti\u1ec1n ch\u1ea5t t\u1ed5ng h\u1ee3p<\/h3>\n\n\n\n

Th\u1ea1ch anh m\u1ea1ch t\u1ef1 nhi\u00ean v\u1eabn l\u00e0 nguy\u00ean li\u1ec7u th\u01b0\u01a1ng m\u1ea1i ch\u00ednh \u0111\u1ec3 s\u1ea3n xu\u1ea5t silica nung ch\u1ea3y \u0111\u1ea1t ti\u00eau chu\u1ea9n EMC m\u1eb7c d\u00f9 c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed5i v\u1ec1 th\u00e0nh ph\u1ea7n. Ti\u1ec1n ch\u1ea5t SiO\u2082 t\u1ed5ng h\u1ee3p c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao h\u01a1n nh\u01b0ng gi\u00e1 th\u00e0nh cao h\u01a1n g\u1ea5p 5-10 l\u1ea7n so v\u1edbi th\u1ea1ch anh t\u1ef1 nhi\u00ean. \u1ede m\u1ee9c \u0111\u1ed9 \u0111\u1ed9n 70-85%, nguy\u00ean li\u1ec7u t\u1ed5ng h\u1ee3p tr\u1edf n\u00ean kh\u00f4ng kinh t\u1ebf \u0111\u1ed1i v\u1edbi vi\u1ec7c \u0111\u00f3ng g\u00f3i b\u00e1n d\u1eabn quy m\u00f4 l\u1edbn. C\u00e1c th\u00f4ng s\u1ed1 nguy\u00ean li\u1ec7u th\u00f4 quan tr\u1ecdng bao g\u1ed3m h\u00e0m l\u01b0\u1ee3ng SiO\u2082, th\u00e0nh ph\u1ea7n kim lo\u1ea1i v\u1ebft v\u00e0 h\u00e0m l\u01b0\u1ee3ng \u1ea9m. S\u1ef1 ph\u00e2n b\u1ed1 t\u1ea1p ch\u1ea5t trong nguy\u00ean li\u1ec7u \u0111\u01b0\u1ee3c x\u00e1c minh b\u1eb1ng ph\u00e2n t\u00edch XRF v\u00e0 ICP-MS. C\u00e1c bao th\u1ec3 ch\u1ea5t l\u1ecfng ho\u1eb7c m\u1ea1ch kho\u00e1ng t\u1eadp trung kim lo\u1ea1i ki\u1ec1m v\u00e0 s\u1eaft trong c\u00e1c m\u1ecf th\u1ea1ch anh. C\u00e1c ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m n\u00e0y xu\u1ea5t hi\u1ec7n trong ch\u1ea5t n\u00f3ng ch\u1ea3y v\u00e0 kh\u00f4ng th\u1ec3 lo\u1ea1i b\u1ecf sau \u0111\u00f3.<\/p>\n\n\n\n

S\u00e0ng l\u1ecdc ph\u00f3ng x\u1ea1<\/h3>\n\n\n\n

Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ebfm h\u1ea1t alpha n\u1ec1n th\u1ea5p s\u00e0ng l\u1ecdc s\u1ef1 ph\u00e1t x\u1ea1 alpha t\u1eeb chu\u1ed7i ph\u00e2n r\u00e3 urani v\u00e0 thori, th\u01b0\u1eddng \u0111o s\u1ed1 l\u01b0\u1ee3ng h\u1ea1t \u0111\u1ebfm m\u1ed7i gi\u1edd tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch. Th\u1eed nghi\u1ec7m n\u00e0y kh\u00f4ng nhanh \u2013 th\u1eddi gian \u0111\u1ebfm ti\u00eau chu\u1ea9n cho s\u00e0ng l\u1ecdc m\u1ee9c \u0111\u1ed9 th\u1ea5p l\u00e0 24 gi\u1edd. C\u00e1c chu\u1ed7i cung \u1ee9ng ph\u1ee5c v\u1ee5 cho vi\u1ec7c \u0111\u00f3ng g\u00f3i logic ti\u00ean ti\u1ebfn v\u00e0 DRAM s\u1ebd c\u00e1ch ly c\u00e1c l\u00f4 nguy\u00ean li\u1ec7u th\u00f4 cho \u0111\u1ebfn khi qu\u00e1 tr\u00ecnh s\u00e0ng l\u1ecdc ph\u00f3ng x\u1ea1 ho\u00e0n t\u1ea5t.<\/p>\n\n\n\n

M\u1ed9t l\u00f4 h\u00e0ng c\u00f3 h\u00e0m l\u01b0\u1ee3ng U cao duy nh\u1ea5t v\u01b0\u1ee3t qua ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng h\u00f3a h\u1ecdc nh\u01b0ng kh\u00f4ng \u0111\u1ea1t ki\u1ec3m tra ph\u00f3ng x\u1ea1 s\u1ebd g\u00e2y gi\u00e1n \u0111o\u1ea1n \u0111\u00e1ng k\u1ec3 chu\u1ed7i cung \u1ee9ng n\u1ebfu qu\u00e1 tr\u00ecnh n\u00f3ng ch\u1ea3y b\u1eaft \u0111\u1ea7u tr\u01b0\u1edbc khi ph\u00e1t hi\u1ec7n.<\/p>\n\n\n\n

Giai \u0111o\u1ea1n 2 \u2014 N\u00f3ng ch\u1ea3y v\u00e0 th\u1ee7y tinh h\u00f3a<\/h2>\n\n\n\n

Vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i th\u1ea1ch anh tinh th\u1ec3 th\u00e0nh silica nung ch\u1ea3y v\u00f4 \u0111\u1ecbnh h\u00ecnh \u0111\u00f2i h\u1ecfi nhi\u1ec7t \u0111\u1ed9 duy tr\u00ec tr\u00ean 1.720\u00b0C \u2014 cao h\u01a1n nhi\u1ec1u so v\u1edbi \u0111i\u1ec3m n\u00f3ng ch\u1ea3y c\u1ee7a th\u1ea1ch anh, kho\u1ea3ng 1.650\u00b0C. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y r\u1ea5t quan tr\u1ecdng: v\u1eadt li\u1ec7u ch\u1ec9 \u0111\u01b0\u1ee3c nung n\u00f3ng \u0111\u1ebfn 1.650\u00b0C s\u1ebd tr\u1ea3i qua qu\u00e1 tr\u00ecnh chuy\u1ec3n pha m\u1ed9t ph\u1ea7n v\u00e0 v\u1eabn gi\u1eef l\u1ea1i h\u00e0m l\u01b0\u1ee3ng tinh th\u1ec3 d\u01b0, \u0111i\u1ec1u n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n trong ph\u00e2n t\u00edch XRD c\u1ee7a s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng.<\/p>\n\n\n\n

So s\u00e1nh ph\u1ea3n \u1ee9ng t\u1ed5ng h\u1ee3p h\u1ea1t nh\u00e2n b\u1eb1ng h\u1ed3 quang \u0111i\u1ec7n v\u00e0 ph\u1ea3n \u1ee9ng t\u1ed5ng h\u1ee3p h\u1ea1t nh\u00e2n b\u1eb1ng ng\u1ecdn l\u1eeda hydro-oxy.<\/h3>\n\n\n\n

Hi\u1ec7n c\u00f3 hai quy tr\u00ecnh n\u1ea5u ch\u1ea3y c\u00f4ng nghi\u1ec7p \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u01b0\u01a1ng m\u1ea1i, v\u00e0 ch\u00fang t\u1ea1o ra c\u00e1c s\u1ea3n ph\u1ea9m kh\u00e1c nhau.<\/p>\n\n\n\n

Ph\u01b0\u01a1ng ph\u00e1p nung ch\u1ea3y h\u1ed3 quang \u0111i\u1ec7n s\u1eed d\u1ee5ng \u0111i\u1ec7n c\u1ef1c than ch\u00ec ho\u1eb7c vonfram \u0111\u1ec3 t\u1ea1o ra nhi\u1ec7t \u0111\u1ed9 c\u1ea7n thi\u1ebft. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y x\u1eed l\u00fd \u0111\u01b0\u1ee3c kh\u1ed1i l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t l\u1edbn (h\u00e0ng t\u1ea5n m\u1ed7i m\u1ebb) v\u00e0 l\u00e0 c\u00f4ng ngh\u1ec7 ch\u1ee7 \u0111\u1ea1o cho silica nung ch\u1ea3y ti\u00eau chu\u1ea9n v\u00e0 h\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i silica nung ch\u1ea3y c\u00f4ng nghi\u1ec7p. R\u1ee7i ro \u00f4 nhi\u1ec5m \u0111\u1ebfn t\u1eeb s\u1ef1 m\u00e0i m\u00f2n \u0111i\u1ec7n c\u1ef1c: \u0111i\u1ec7n c\u1ef1c than ch\u00ec \u0111\u00f3ng g\u00f3p carbon v\u00e0o ch\u1ea5t n\u00f3ng ch\u1ea3y; \u0111i\u1ec7n c\u1ef1c kim lo\u1ea1i \u0111\u00f3ng g\u00f3p c\u00e1c kim lo\u1ea1i v\u1ebft. C\u1ea3 hai \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1eb1ng quy tr\u00ecnh, nh\u01b0ng ch\u00fang \u0111\u1eb7t ra gi\u1edbi h\u1ea1n v\u1ec1 \u0111\u1ed9 tinh khi\u1ebft c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c, khi\u1ebfn ph\u01b0\u01a1ng ph\u00e1p nung ch\u1ea3y h\u1ed3 quang \u0111i\u1ec7n k\u00e9m ph\u00f9 h\u1ee3p h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec7n t\u1eed cao c\u1ea5p nh\u1ea5t.<\/p>\n\n\n\n

Ph\u01b0\u01a1ng ph\u00e1p nung ch\u1ea3y b\u1eb1ng ng\u1ecdn l\u1eeda hydro-oxy \u0111\u1ed1t ch\u00e1y H\u2082 v\u00e0 O\u2082 \u0111\u1ec3 t\u1ea1o ra ng\u1ecdn l\u1eeda s\u1ea1ch, nhi\u1ec7t \u0111\u1ed9 cao (tr\u00ean 2.000\u00b0C t\u1ea1i v\u00f9ng ph\u1ea3n \u1ee9ng). Kh\u00f4ng c\u00f3 \u0111i\u1ec7n c\u1ef1c, kh\u00f4ng c\u00f3 b\u1ed9 ph\u1eadn kim lo\u1ea1i n\u00e0o ti\u1ebfp x\u00fac v\u1edbi ch\u1ea5t n\u00f3ng ch\u1ea3y, v\u00e0 kh\u00ed s\u1eed d\u1ee5ng duy nh\u1ea5t trong qu\u00e1 tr\u00ecnh l\u00e0 hydro v\u00e0 oxy. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y t\u1ea1o ra silica nung ch\u1ea3y c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao h\u01a1n v\u1edbi n\u0103ng su\u1ea5t th\u1ea5p h\u01a1n v\u00e0 chi ph\u00ed cao h\u01a1n tr\u00ean m\u1ed7i kilogram. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c \u01b0u ti\u00ean cho c\u00e1c lo\u1ea1i silica si\u00eau m\u1ecbn v\u00e0 si\u00eau tinh khi\u1ebft, trong \u0111\u00f3 s\u1ef1 nhi\u1ec5m b\u1ea9n \u0111i\u1ec7n c\u1ef1c c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p nung ch\u1ea3y h\u1ed3 quang s\u1ebd v\u01b0\u1ee3t qu\u00e1 ti\u00eau chu\u1ea9n t\u1ea1p ch\u1ea5t.<\/p>\n\n\n\n

M\u1ed9t nh\u01b0\u1ee3c \u0111i\u1ec3m \u0111\u1eb7c th\u00f9 c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p h\u00e0n n\u00f3ng ch\u1ea3y b\u1eb1ng ng\u1ecdn l\u1eeda: qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y hydro t\u1ea1o ra h\u01a1i n\u01b0\u1edbc, c\u00f3 th\u1ec3 \u0111\u01b0a c\u00e1c nh\u00f3m hydroxyl (\u2013OH) v\u00e0o m\u1ea1ng l\u01b0\u1edbi th\u1ee7y tinh. L\u01b0\u1ee3ng \u2013OH d\u01b0 th\u1eeba l\u00e0m t\u0103ng h\u1ec7 s\u1ed1 t\u1ed5n hao \u0111i\u1ec7n m\u00f4i \u1edf t\u1ea7n s\u1ed1 vi s\u00f3ng \u2014 m\u1ed9t v\u1ea5n \u0111\u1ec1 \u0111\u00e1ng lo ng\u1ea1i \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea5m n\u1ec1n PCB \u1edf b\u0103ng t\u1ea7n 5G. Vi\u1ec7c ki\u1ec3m so\u00e1t \u0111\u1ed9 \u1ea9m trong m\u00f4i tr\u01b0\u1eddng x\u1eed l\u00fd (ki\u1ec3m so\u00e1t t\u1ef7 l\u1ec7 H\u2082\/O\u2082 v\u00e0 m\u00f4i tr\u01b0\u1eddng l\u00f2 nung) gi\u00fap gi\u1eef l\u01b0\u1ee3ng \u2013OH d\u01b0\u1edbi ng\u01b0\u1ee1ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t \u0111i\u1ec7n.<\/p>\n\n\n\n

C\u1ed5ng ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng sau khi n\u1ea5u ch\u1ea3y<\/h3>\n\n\n\n

\u2022 Ph\u00e2n t\u00edch XRD: \u0111\u1ec3 \u0111\u1ecbnh l\u01b0\u1ee3ng h\u00e0m l\u01b0\u1ee3ng v\u00f4 \u0111\u1ecbnh h\u00ecnh \u2014 Ph\u01b0\u01a1ng ph\u00e1p tinh ch\u1ec9nh Rietveld s\u1ebd cho th\u1ea5y c\u00e1c pha tinh th\u1ec3 <0,5% \u0111\u1ed1i v\u1edbi v\u1eadt li\u1ec7u c\u1ea5p \u0111i\u1ec7n t\u1eed.
\u2022 Ph\u00e2n t\u00edch l\u1ea1i b\u1eb1ng ICP-MS: \u0111\u1ec3 x\u00e1c minh kh\u00f4ng c\u00f3 s\u1ef1 nhi\u1ec5m b\u1ea9n n\u00e0o x\u1ea3y ra trong qu\u00e1 tr\u00ecnh n\u1ea5u ch\u1ea3y \u2014 so s\u00e1nh h\u1ed3 s\u01a1 kim lo\u1ea1i v\u1ebft tr\u01b0\u1edbc v\u00e0 sau khi n\u1ea5u ch\u1ea3y.
\u2022Ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng: ki\u1ec3m tra c\u00e1c v\u00f9ng ch\u01b0a tan ch\u1ea3y, t\u1ea1p ch\u1ea5t v\u00e0 b\u1ecdt kh\u00ed l\u1edbn trong th\u1ecfi ho\u1eb7c kh\u1ed1i kim lo\u1ea1i tr\u01b0\u1edbc khi nghi\u1ec1n.<\/p>\n\n\n\n

Giai \u0111o\u1ea1n 3 \u2014 Gi\u1ea3m k\u00edch th\u01b0\u1edbc s\u01a1 c\u1ea5p: Nghi\u1ec1n v\u00e0 xay s\u01a1 b\u1ed9<\/h2>\n\n\n\n

Silica nung ch\u1ea3y ra kh\u1ecfi giai \u0111o\u1ea1n n\u1ea5u ch\u1ea3y d\u01b0\u1edbi d\u1ea1ng th\u1ecfi, c\u1ee5c ho\u1eb7c t\u1ea5m \u2014 nguy\u00ean li\u1ec7u c\u1ea7n \u0111\u01b0\u1ee3c gi\u1ea3m k\u00edch th\u01b0\u1edbc xu\u1ed1ng m\u1ee9c ph\u00f9 h\u1ee3p tr\u01b0\u1edbc khi nghi\u1ec1n m\u1ecbn. Giai \u0111o\u1ea1n n\u00e0y nh\u1eb1m m\u1ee5c \u0111\u00edch gi\u1ea3m k\u00edch th\u01b0\u1edbc hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng g\u00e2y \u00f4 nhi\u1ec5m kim lo\u1ea1i, \u0111i\u1ec1u c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng t\u1ea5t c\u1ea3 nh\u1eefng th\u00e0nh qu\u1ea3 \u0111\u1ea1t \u0111\u01b0\u1ee3c trong giai \u0111o\u1ea1n n\u1ea5u ch\u1ea3y.<\/p>\n\n\n\n

Qu\u00e1 tr\u00ecnh nghi\u1ec1n b\u1eb1ng h\u00e0m gi\u00fap gi\u1ea3m k\u00edch th\u01b0\u1edbc ph\u00f4i t\u1eeb 50-200 mm xu\u1ed1ng c\u00f2n <10 mm. Nguy c\u01a1 \u00f4 nhi\u1ec5m \u0111\u1ebfn t\u1eeb s\u1ef1 m\u00e0i m\u00f2n c\u1ee7a t\u1ea5m h\u00e0m: c\u00e1c t\u1ea5m h\u00e0m b\u1eb1ng th\u00e9p mangan ti\u00eau chu\u1ea9n gi\u1ea3i ph\u00f3ng s\u1eaft \u1edf m\u1ee9c \u0111\u1ed9 kh\u00f4ng th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ed1i v\u1edbi v\u1eadt li\u1ec7u c\u1ea5p \u0111i\u1ec7n t\u1eed. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t s\u1eed d\u1ee5ng c\u00e1c t\u1ea5m h\u00e0m b\u1eb1ng g\u1ed1m alumina cao ho\u1eb7c c\u00e1c t\u1ea5m h\u00e0m composite cacbua vonfram \u0111\u1ec3 nghi\u1ec1n s\u01a1 c\u1ea5p silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed. C\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec1u l\u00e0m t\u0103ng chi ph\u00ed nh\u01b0ng ng\u0103n ng\u1eeba s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a s\u1eaft \u1edf giai \u0111o\u1ea1n m\u00e0 t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y kh\u1ed1i l\u01b0\u1ee3ng \u0111\u1ee7 cao \u0111\u1ec3 vi\u1ec7c kh\u1eafc ph\u1ee5c \u00f4 nhi\u1ec5m \u1edf giai \u0111o\u1ea1n sau tr\u1edf n\u00ean kh\u00f4ng kh\u1ea3 thi.<\/p>\n\n\n\n

Qu\u00e1 tr\u00ecnh nghi\u1ec1n s\u01a1 b\u1ed9 \u0111\u1ebfn k\u00edch th\u01b0\u1edbc 100-200 mesh (75-150 \u03bcm) s\u1eed d\u1ee5ng m\u00e1y nghi\u1ec1n tr\u1ee5c l\u0103n ho\u1eb7c m\u00e1y nghi\u1ec1n bi c\u00f3 l\u1edbp l\u00f3t g\u1ed1m \u2013 alumina ho\u1eb7c zirconia t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a t\u1ea1p ch\u1ea5t. M\u1ee5c ti\u00eau \u1edf giai \u0111o\u1ea1n n\u00e0y l\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t (PSD) \u1ed5n \u0111\u1ecbnh cho b\u01b0\u1edbc nghi\u1ec1n m\u1ecbn: 100% l\u1ecdt qua 150 \u03bcm, v\u1edbi D50 th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng 30-60 \u03bcm. Nghi\u1ec1n qu\u00e1 m\u1ee9c \u1edf giai \u0111o\u1ea1n n\u00e0y s\u1ebd l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng m\u00e0 kh\u00f4ng mang l\u1ea1i l\u1ee3i \u00edch; nghi\u1ec1n ch\u01b0a \u0111\u1ee7 s\u1ebd t\u1ea1o ra ngu\u1ed3n nguy\u00ean li\u1ec7u kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u00e0 th\u00f4 h\u01a1n cho b\u01b0\u1edbc nghi\u1ec1n m\u1ecbn, l\u00e0m thay \u0111\u1ed5i \u0111i\u1ec3m ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ch ph\u00e2n lo\u1ea1i.<\/p>\n\n\n\n

Giai \u0111o\u1ea1n 4 \u2014 Nghi\u1ec1n m\u1ecbn \u0111\u1ebfn k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ee5c ti\u00eau<\/h2>\n\n\n\n

Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt D50 c\u1ee7a \u1ee9ng d\u1ee5ng\u2014dao \u0111\u1ed9ng t\u1eeb 1 \u03bcm \u0111\u1ebfn 15 \u03bcm\u2014hi\u1ec7n nay quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 m\u1ecbn m\u00e0 ng\u01b0\u1eddi v\u1eadn h\u00e0nh ph\u1ea3i nghi\u1ec1n nguy\u00ean li\u1ec7u silica nung ch\u1ea3y \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u1ec1n s\u1eb5n. C\u00f3 hai c\u00f4ng ngh\u1ec7 cho b\u01b0\u1edbc nghi\u1ec1n n\u00e0y. \u0110\u1ed9 m\u1ecbn m\u1ee5c ti\u00eau v\u00e0 m\u1ee9c \u0111\u1ed9 nhi\u1ec5m b\u1ea9n cho ph\u00e9p l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 ch\u00ednh quy\u1ebft \u0111\u1ecbnh s\u1ef1 l\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7.<\/p>\n\n\n\n

M\u00e1y nghi\u1ec1n bi c\u00f3 b\u1ed9 ph\u00e2n lo\u1ea1i kh\u00ed (Lo\u1ea1i ti\u00eau chu\u1ea9n v\u00e0 lo\u1ea1i trung b\u00ecnh)<\/h3>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u EMC ti\u00eau chu\u1ea9n v\u1edbi D50 5-15 \u03bcm v\u00e0 D97 d\u01b0\u1edbi 25-45 \u03bcm, m\u00e1y nghi\u1ec1n bi l\u00f3t g\u1ed1m trong h\u1ec7 th\u1ed1ng m\u1ea1ch k\u00edn k\u1ebft h\u1ee3p v\u1edbi b\u1ed9 ph\u00e2n lo\u1ea1i kh\u00ed \u0111\u1ed9ng l\u00e0 l\u1ef1a ch\u1ecdn ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng nh\u1ea5t. M\u00e1y nghi\u1ec1n l\u00e0m gi\u1ea3m k\u00edch th\u01b0\u1edbc h\u1ea1t; b\u1ed9 ph\u00e2n lo\u1ea1i s\u1ebd ph\u00e2n chia s\u1ea3n ph\u1ea9m \u0111\u1ea7u ra, \u0111\u01b0a c\u00e1c h\u1ea1t qu\u00e1 c\u1ee1 tr\u1edf l\u1ea1i m\u00e1y nghi\u1ec1n v\u00e0 \u0111\u01b0a c\u00e1c h\u1ea1t \u0111\u1ea1t ti\u00eau chu\u1ea9n \u0111\u1ebfn h\u1ec7 th\u1ed1ng thu gom s\u1ea3n ph\u1ea9m. Thi\u1ebft k\u1ebf m\u1ea1ch k\u00edn n\u00e0y ng\u0103n ng\u1eeba vi\u1ec7c nghi\u1ec1n qu\u00e1 m\u1ee9c: c\u00e1c h\u1ea1t s\u1ebd tho\u00e1t ra kh\u1ecfi m\u1ea1ch ngay khi \u0111\u1ea1t ti\u00eau chu\u1ea9n k\u00edch th\u01b0\u1edbc, thay v\u00ec ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c nghi\u1ec1n m\u1ecbn h\u01a1n m\u1ee9c c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n

Qu\u1ea3n l\u00fd \u00f4 nhi\u1ec5m: v\u1eadt li\u1ec7u bi v\u00e0 l\u1edbp l\u00f3t ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi dung sai t\u1ea1p ch\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m. \u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng EMC ti\u00eau chu\u1ea9n, bi alumina (Al\u2082O\u2083) trong m\u00e1y nghi\u1ec1n l\u00f3t alumina l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p ph\u00f9 h\u1ee3p \u2014 s\u1ef1 nhi\u1ec5m b\u1ea9n Al do m\u00e0i m\u00f2n l\u1edbp l\u00f3t g\u00e2y ra l\u00e0 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c trong c\u00e1c c\u00f4ng th\u1ee9c EMC g\u1ed1c SiO\u2082. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 ngay c\u1ea3 s\u1ef1 nhi\u1ec5m b\u1ea9n Al c\u0169ng \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh \u1edf m\u1ee9c d\u01b0\u1edbi 50 ppm, bi zirconia trong m\u00e1y nghi\u1ec1n l\u00f3t zirconia s\u1ebd lo\u1ea1i b\u1ecf \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng d\u1eabn Al nh\u01b0ng v\u1edbi chi ph\u00ed thi\u1ebft b\u1ecb cao h\u01a1n.<\/p>\n\n\n\n

Gia c\u00f4ng b\u1eb1ng tia n\u01b0\u1edbc cho c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u m\u1ecbn v\u00e0 si\u00eau m\u1ecbn.<\/h3>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i h\u1ea1t c\u00f3 b\u01b0\u1edbc r\u0103ng nh\u1ecf v\u00e0 h\u1ea1t m\u00e0i WLP y\u00eau c\u1ea7u D50 d\u01b0\u1edbi 5 \u03bcm v\u00e0 Dmax d\u01b0\u1edbi 15 \u03bcm, ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n b\u1eb1ng tia kh\u00ed n\u00e9n trong bu\u1ed3ng t\u1ea7ng s\u00f4i l\u00e0 quy tr\u00ecnh ti\u00eau chu\u1ea9n. \u01afu \u0111i\u1ec3m ch\u00ednh l\u00e0 c\u01a1 ch\u1ebf nghi\u1ec1n: c\u00e1c h\u1ea1t b\u1ecb v\u1ee1 do va ch\u1ea1m v\u1edbi nhau \u1edf t\u1ed1c \u0111\u1ed9 cao, \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y b\u1edfi c\u00e1c tia kh\u00ed n\u00e9n. Kh\u00f4ng c\u00f3 b\u1ec1 m\u1eb7t nghi\u1ec1n n\u00e0o ti\u1ebfp x\u00fac v\u1edbi s\u1ea3n ph\u1ea9m \u2014 c\u00e1c b\u1ec1 m\u1eb7t r\u1eafn duy nh\u1ea5t l\u00e0 th\u00e0nh bu\u1ed3ng v\u00e0 b\u00e1nh xe ph\u00e2n lo\u1ea1i, c\u1ea3 hai \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00f3t g\u1ed1m. S\u1ef1 nhi\u1ec5m b\u1ea9n kim lo\u1ea1i t\u1eeb b\u01b0\u1edbc nghi\u1ec1n g\u1ea7n nh\u01b0 b\u1eb1ng kh\u00f4ng.<\/p>\n\n\n\n

Kh\u00ed n\u00e9n ph\u1ea3i kh\u00f4 v\u00e0 kh\u00f4ng ch\u1ee9a d\u1ea7u. \u0110\u1ed9 \u1ea9m trong kh\u00ed nghi\u1ec1n \u1edf k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ecbn g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng v\u00f3n c\u1ee5c h\u1ea1t t\u1ea1i b\u1ed9 ph\u00e2n lo\u1ea1i, l\u00e0m m\u1edf r\u1ed9ng ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t (PSD) v\u00e0 l\u00e0m t\u0103ng D97 m\u1ed9t c\u00e1ch kh\u00f3 d\u1ef1 \u0111o\u00e1n. Vi\u1ec7c l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb gi\u00e1m s\u00e1t \u0111i\u1ec3m s\u01b0\u01a1ng tr\u1ef1c tuy\u1ebfn t\u1ea1i \u0111\u1ea7u v\u00e0o kh\u00ed l\u00e0 ti\u00eau chu\u1ea9n trong s\u1ea3n xu\u1ea5t silica nung ch\u1ea3y lo\u1ea1i m\u1ecbn.<\/p>\n\n\n\n

Chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n b\u1eb1ng tia kh\u00ed cao h\u01a1n 3-4 l\u1ea7n m\u1ed7i t\u1ea5n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n b\u1eb1ng bi \u0111\u1ed1i v\u1edbi c\u00f9ng m\u1ee5c ti\u00eau D50. \u0110\u1ed1i v\u1edbi silica nung ch\u1ea3y lo\u1ea1i m\u1ecbn \u1edf m\u1ee9c $40-80\/kg, chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng cao h\u01a1n n\u00e0y ho\u00e0n to\u00e0n h\u1ee3p l\u00fd. \u0110i\u1ec3m giao nhau \u2014 n\u01a1i m\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n b\u1eb1ng tia kh\u00ed tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn kinh t\u1ebf h\u01a1n v\u1ec1 t\u1ed5ng chi ph\u00ed so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n b\u1eb1ng bi c\u1ed9ng v\u1edbi vi\u1ec7c ki\u1ec3m so\u00e1t \u00f4 nhi\u1ec5m nghi\u00eam ng\u1eb7t \u2014 th\u01b0\u1eddng n\u1eb1m \u1edf kho\u1ea3ng D50 4-5 \u03bcm.<\/p>\n\n\n\n

G\u00f3c c\u1ea1nh so v\u1edbi h\u00ecnh c\u1ea7u: C\u00e2u h\u1ecfi v\u1ec1 h\u00ecnh th\u00e1i h\u1ecdc<\/h3>\n\n\n\n

C\u1ea3 ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n bi v\u00e0 nghi\u1ec1n tia \u0111\u1ec1u t\u1ea1o ra c\u00e1c h\u1ea1t c\u00f3 h\u00ecnh d\u1ea1ng g\u00f3c c\u1ea1nh. C\u01a1 h\u1ecdc ph\u00e1 v\u1ee1 \u0111\u1ea3m b\u1ea3o \u0111i\u1ec1u n\u00e0y \u2014 qu\u00e1 tr\u00ecnh nghi\u1ec1n l\u00e0m v\u1ee1 v\u1eadt li\u1ec7u d\u1ecdc theo c\u00e1c m\u1eb7t ph\u1eb3ng t\u1eadp trung \u1ee9ng su\u1ea5t, t\u1ea1o ra c\u00e1c m\u1ea3nh v\u1ee1 kh\u00f4ng \u0111\u1ec1u b\u1ea5t k\u1ec3 c\u00f4ng ngh\u1ec7 n\u00e0o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Silica nung ch\u1ea3y c\u00f3 h\u00ecnh d\u1ea1ng g\u00f3c c\u1ea1nh ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n EMC \u1edf t\u1ea3i tr\u1ecdng l\u00ean \u0111\u1ebfn kho\u1ea3ng 80% theo tr\u1ecdng l\u01b0\u1ee3ng.<\/p>\n\n\n\n

C\u00e1c g\u00f3i s\u1ea3n ph\u1ea9m ti\u00ean ti\u1ebfn y\u00eau c\u1ea7u t\u1ea3i tr\u1ecdng CTE th\u1ea5p nh\u1ea5t tr\u00ean 80%. C\u00e1c h\u1ea1t g\u00f3c c\u1ea1nh t\u1ea1o ra \u0111\u1ed9 nh\u1edbt qu\u00e1 m\u1ee9c trong h\u1ed7n h\u1ee3p \u1edf m\u1ee9c t\u1ea3i tr\u1ecdng n\u00e0y, c\u1ea3n tr\u1edf d\u00f2ng ch\u1ea3y c\u1ee7a khu\u00f4n chuy\u1ec3n. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t t\u1ea1o ra silica nung ch\u1ea3y h\u00ecnh c\u1ea7u b\u1eb1ng c\u00e1ch cho b\u1ed9t m\u1ecbn g\u00f3c c\u1ea1nh \u0111i qua ng\u1ecdn l\u1eeda hydro-oxy (qu\u00e1 tr\u00ecnh c\u1ea7u h\u00f3a b\u1eb1ng ng\u1ecdn l\u1eeda). Qu\u00e1 tr\u00ecnh c\u1ea7u h\u00f3a kh\u00f4ng l\u00e0m thay \u0111\u1ed5i th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a h\u1ea1t ho\u1eb7c h\u00e0m l\u01b0\u1ee3ng v\u00f4 \u0111\u1ecbnh h\u00ecnh; n\u00f3 chuy\u1ec3n \u0111\u1ed5i h\u00ecnh d\u1ea1ng h\u1ea1t th\u00f4ng qua hi\u1ec7u \u1ee9ng s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t \u1edf tr\u1ea1ng th\u00e1i n\u00f3ng ch\u1ea3y. Chi ph\u00ed cao h\u01a1n \u0111\u00e1ng k\u1ec3 (th\u01b0\u1eddng g\u1ea5p 2-3 l\u1ea7n m\u1ed7i kg so v\u1edbi s\u1ea3n ph\u1ea9m g\u00f3c c\u1ea1nh c\u00f3 c\u00f9ng PSD) v\u00e0 ch\u1ec9 \u0111\u01b0\u1ee3c bi\u1ec7n minh cho c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 m\u1ee5c ti\u00eau t\u1ea3i tr\u1ecdng kh\u00f4ng th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c v\u1edbi ch\u1ea5t \u0111\u1ed9n g\u00f3c c\u1ea1nh.<\/p>\n\n\n\n

Giai \u0111o\u1ea1n 5 \u2014 Ph\u00e2n lo\u1ea1i theo k\u00edch th\u01b0\u1edbc h\u1ea1t cu\u1ed1i c\u00f9ng<\/h3>\n\n\n\n

\u0110\u00e2y l\u00e0 giai \u0111o\u1ea1n thi\u1ebft l\u1eadp PSD cu\u1ed1i c\u00f9ng \u2014 v\u00e0 \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec7n t\u1eed, \u0111\u00e2y l\u00e0 b\u01b0\u1edbc \u0111\u00f2i h\u1ecfi k\u1ef9 thu\u1eadt cao nh\u1ea5t trong chu\u1ed7i s\u1ea3n xu\u1ea5t. Qu\u00e1 tr\u00ecnh m\u00e0i x\u00e1c \u0111\u1ecbnh D50 x\u1ea5p x\u1ec9. Ph\u00e2n lo\u1ea1i x\u00e1c \u0111\u1ecbnh D97, Dmax v\u00e0 ph\u1ea1m vi v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e0 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u00f3ng g\u00f3i b\u00e1n d\u1eabn y\u00eau c\u1ea7u.<\/p>\n\n\n\n

V\u00ec sao kh\u00f4ng th\u1ec3 b\u1ecf qua kh\u00e2u ph\u00e2n lo\u1ea1i<\/h3>\n\n\n\n

Qu\u00e1 tr\u00ecnh nghi\u1ec1n t\u1ea1o ra s\u1ef1 ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t r\u1ed9ng v\u00e0 li\u00ean t\u1ee5c. M\u00e1y nghi\u1ec1n bi ho\u1eb7c m\u00e1y nghi\u1ec1n kh\u00ed ho\u1ea1t \u0111\u1ed9ng v\u1edbi m\u1ed9t l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng \u0111\u1ea7u v\u00e0o nh\u1ea5t \u0111\u1ecbnh s\u1ebd t\u1ea1o ra v\u1eadt li\u1ec7u c\u00f3 k\u00edch th\u01b0\u1edbc t\u1eeb c\u00e1c h\u1ea1t d\u01b0\u1edbi micromet \u0111\u1ebfn c\u00e1c h\u1ea1t c\u00f3 k\u00edch th\u01b0\u1edbc g\u1ea5p 5-10 l\u1ea7n D50. Gi\u00e1 tr\u1ecb D97 c\u1ee7a s\u1ea3n ph\u1ea9m nghi\u1ec1n ch\u01b0a ph\u00e2n lo\u1ea1i th\u01b0\u1eddng g\u1ea5p 3-5 l\u1ea7n D50 \u2014 c\u00f3 ngh\u0129a l\u00e0 v\u1edbi D50 l\u00e0 5 \u03bcm, gi\u00e1 tr\u1ecb Dmax t\u1eeb 30-50 \u03bcm l\u00e0 ph\u1ed5 bi\u1ebfn n\u1ebfu kh\u00f4ng ph\u00e2n lo\u1ea1i. \u0110\u1ed1i v\u1edbi b\u01b0\u1edbc d\u00e2y h\u00e0n 0,4 mm, c\u00e1c h\u1ea1t c\u00f3 k\u00edch th\u01b0\u1edbc tr\u00ean 25 \u03bcm l\u00e0 c\u00e1c h\u1ea1t g\u00e2y h\u1ea1i. Ph\u00e2n lo\u1ea1i l\u00e0 b\u1eaft bu\u1ed9c.<\/p>\n\n\n\n

Ph\u00e2n lo\u1ea1i kh\u00f4ng kh\u00ed m\u1ed9t giai \u0111o\u1ea1n (Ti\u00eau chu\u1ea9n)<\/h3>\n\n\n\n

M\u00e1y ph\u00e2n lo\u1ea1i kh\u00ed \u0111\u1ed9ng t\u00e1ch c\u00e1c h\u1ea1t b\u1eb1ng s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa l\u1ef1c ly t\u00e2m v\u00e0 l\u1ef1c c\u1ea3n kh\u00ed \u0111\u1ed9ng h\u1ecdc t\u1ea1i b\u1ec1 m\u1eb7t b\u00e1nh xe ph\u00e2n lo\u1ea1i. T\u1ed1c \u0111\u1ed9 quay c\u1ee7a b\u00e1nh xe \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec3m ph\u00e2n t\u00e1ch: t\u1ed1c \u0111\u1ed9 cao h\u01a1n s\u1ebd \u0111\u1ea9y c\u00e1c h\u1ea1t l\u1edbn h\u01a1n tr\u1edf l\u1ea1i m\u00e1y nghi\u1ec1n, c\u00e1c h\u1ea1t m\u1ecbn h\u01a1n s\u1ebd \u0111i qua \u0111\u1ec3 \u0111\u1ebfn s\u1ea3n ph\u1ea9m. \u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i EMC ti\u00eau chu\u1ea9n m\u00e0 D97 ph\u1ea3i nh\u1ecf h\u01a1n 25 \u03bcm, m\u00e1y ph\u00e2n lo\u1ea1i m\u1ed9t t\u1ea7ng l\u00e0 \u0111\u1ee7 \u2013 \u0111\u1ed9 s\u1eafc n\u00e9t ph\u00e2n t\u00e1ch \u0111\u1ea1t \u0111\u01b0\u1ee3c v\u1edbi m\u1ed9t r\u00f4to \u0111\u01a1n \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh t\u1ed1t l\u00e0 \u0111\u1ee7 \u0111\u1ec3 \u0111\u00e1p \u1ee9ng m\u1ee5c ti\u00eau n\u00e0y m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n.<\/p>\n\n\n\n

Ph\u00e2n lo\u1ea1i nhi\u1ec1u giai \u0111o\u1ea1n cho c\u00e1c lo\u1ea1i h\u1ea1t m\u1ecbn<\/h3>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i h\u1ea1t c\u00f3 b\u01b0\u1edbc r\u0103ng m\u1ecbn v\u00e0 WLP, n\u01a1i D97 ph\u1ea3i nh\u1ecf h\u01a1n 10-12 \u03bcm, m\u1ed9t giai \u0111o\u1ea1n ph\u00e2n lo\u1ea1i duy nh\u1ea5t kh\u00f4ng cung c\u1ea5p \u0111\u1ee7 \u0111\u1ed9 s\u1eafc n\u00e9t \u0111\u1ec3 ph\u00e2n t\u00e1ch. V\u00f9ng chuy\u1ec3n ti\u1ebfp gi\u1eefa c\u00e1c h\u1ea1t \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 m\u1ecbn v\u00e0 c\u00e1c h\u1ea1t b\u1ecb lo\u1ea1i b\u1ecf l\u00e0 th\u00f4 qu\u00e1 r\u1ed9ng \u2014 m\u1ed9t s\u1ed1 h\u1ea1t c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n D97 m\u1ee5c ti\u00eau v\u1eabn l\u1ecdt v\u00e0o s\u1ea3n ph\u1ea9m. M\u1ea1ch ph\u00e2n lo\u1ea1i hai giai \u0111o\u1ea1n gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y: b\u1ed9 ph\u00e2n lo\u1ea1i \u0111\u1ea7u ti\u00ean thi\u1ebft l\u1eadp D50; b\u1ed9 ph\u00e2n lo\u1ea1i th\u1ee9 hai ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t b\u1ed9 ph\u00e2n lo\u1ea1i c\u1eaft tr\u00ean s\u1eafc n\u00e9t, nh\u1eafm m\u1ee5c ti\u00eau c\u1ee5 th\u1ec3 v\u00e0o ph\u1ea7n \u0111u\u00f4i th\u00f4 v\u00e0 \u0111\u1ea3m b\u1ea3o Dmax lu\u00f4n n\u1eb1m d\u01b0\u1edbi gi\u1edbi h\u1ea1n quy \u0111\u1ecbnh. Ph\u01b0\u01a1ng ph\u00e1p hai giai \u0111o\u1ea1n l\u00e0m t\u0103ng chi ph\u00ed thi\u1ebft b\u1ecb v\u00e0 gi\u1ea3m n\u0103ng su\u1ea5t tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb c\u00f4ng su\u1ea5t ph\u00e2n lo\u1ea1i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t, nh\u01b0ng \u0111\u00e2y l\u00e0 c\u00e1ch duy nh\u1ea5t \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 gi\u1eef D97 d\u01b0\u1edbi 10 \u03bcm v\u1edbi \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh m\u00e0 chu\u1ed7i cung \u1ee9ng c\u1ea5p \u0111i\u1ec7n t\u1eed y\u00eau c\u1ea7u.<\/p>\n\n\n\n

C\u1ea5u tr\u00fac h\u00ecnh h\u1ecdc c\u1ee7a m\u00e1y ph\u00e2n lo\u1ea1i tr\u1ee5c ngang c\u00f3 m\u1ed9t \u01b0u \u0111i\u1ec3m \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i h\u1ea1t m\u1ecbn. Trong m\u00e1y ph\u00e2n lo\u1ea1i tr\u1ee5c \u0111\u1ee9ng, s\u1ef1 l\u1eafng \u0111\u1ecdng do tr\u1ecdng l\u1ef1c c\u1ee7a c\u00e1c h\u1ea1t l\u1edbn h\u01a1n b\u00f9 \u0111\u1eafp m\u1ed9t ph\u1ea7n l\u1ef1c ly t\u00e2m \u2013 t\u1ea1i c\u00e1c \u0111i\u1ec3m c\u1eaft d\u01b0\u1edbi 5 \u03bcm, \u0111i\u1ec1u n\u00e0y t\u1ea1o ra s\u1ef1 ph\u00e2n t\u00e1ch kh\u00f4ng \u0111\u1ed1i x\u1ee9ng, l\u00e0m m\u1edf r\u1ed9ng s\u1ef1 ph\u00e2n b\u1ed1 v\u1ec1 ph\u00eda h\u1ea1t th\u00f4. M\u00e1y ph\u00e2n lo\u1ea1i tr\u1ee5c ngang lo\u1ea1i b\u1ecf hi\u1ec7u \u1ee9ng n\u00e0y b\u1eb1ng c\u00e1ch \u0111\u1ecbnh h\u01b0\u1edbng v\u00f9ng ph\u00e2n lo\u1ea1i vu\u00f4ng g\u00f3c v\u1edbi tr\u1ecdng l\u1ef1c, t\u1ea1o ra c\u00e1c \u0111i\u1ec3m c\u1eaft s\u1eafc n\u00e9t h\u01a1n \u1edf k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ecbn.<\/p>\n\n\n\n

Gi\u00e1m s\u00e1t PSD tr\u1ef1c tuy\u1ebfn<\/h3>\n\n\n\n

\u0110\u1ed1i v\u1edbi s\u1ea3n xu\u1ea5t linh ki\u1ec7n \u0111i\u1ec7n t\u1eed, vi\u1ec7c l\u1ea5y m\u1eabu cu\u1ed1i l\u00f4 kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng. M\u1ed9t m\u1ebb s\u1ea3n xu\u1ea5t k\u00e9o d\u00e0i 4 gi\u1edd, b\u1eaft \u0111\u1ea7u v\u1edbi ch\u1ec9 s\u1ed1 D97 n\u1eb1m trong ph\u1ea1m vi cho ph\u00e9p nh\u01b0ng l\u1ea1i v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi cho ph\u00e9p trong 90 ph\u00fat cu\u1ed1i, s\u1ebd t\u1ea1o ra m\u1ed9t l\u00f4 h\u00e0ng h\u1ed7n h\u1ee3p \u2014 m\u1ed9t s\u1ed1 \u0111\u1ea1t ti\u00eau chu\u1ea9n, m\u1ed9t s\u1ed1 th\u00ec kh\u00f4ng. Vi\u1ec7c t\u00e1ch ch\u00fang ra sau \u0111\u00f3 l\u00e0 kh\u00f4ng kh\u1ea3 thi. Gi\u1ea3i ph\u00e1p ti\u00eau chu\u1ea9n l\u00e0 s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn nhi\u1ec5u x\u1ea1 laser \u0111\u1eb7t t\u1ea1i \u0111\u1ea7u ra s\u1ea3n ph\u1ea9m c\u1ee7a b\u1ed9 ph\u00e2n lo\u1ea1i, ghi l\u1ea1i c\u00e1c ch\u1ec9 s\u1ed1 D10, D50, D90, D97 m\u1ed7i 30-60 gi\u00e2y. T\u1ed1c \u0111\u1ed9 quay c\u1ee7a b\u00e1nh xe ph\u00e2n lo\u1ea1i \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed3ng b\u1ed9 v\u1edbi ch\u1ec9 s\u1ed1 D97 th\u00f4ng qua b\u1ed9 \u0111i\u1ec1u khi\u1ec3n ph\u1ea3n h\u1ed3i: khi D97 c\u00f3 xu h\u01b0\u1edbng t\u0103ng l\u00ean, t\u1ed1c \u0111\u1ed9 quay c\u1ee7a b\u00e1nh xe s\u1ebd t\u0103ng \u0111\u1ec3 si\u1ebft ch\u1eb7t v\u1ebft c\u1eaft. \u0110i\u1ec1u n\u00e0y gi\u00fap s\u1ea3n ph\u1ea9m lu\u00f4n n\u1eb1m trong ph\u1ea1m vi cho ph\u00e9p thay v\u00ec ph\u1ea3i ki\u1ec3m tra sau khi s\u1ea3n ph\u1ea9m \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i.<\/p>\n\n\n\n

C\u00e1c th\u00f4ng s\u1ed1 t\u1ed1i thi\u1ec3u trong Gi\u1ea5y ch\u1ee9ng nh\u1eadn ph\u00e2n t\u00edch cho silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed<\/strong>
C\u00e1c th\u00f4ng s\u1ed1 PSD: <\/strong>D10, D50, D90, D97 v\u00e0 Dmax \u2014 c\u1ea3 n\u0103m gi\u00e1 tr\u1ecb n\u00e0y \u0111\u1ec1u b\u1eaft bu\u1ed9c. Ch\u1ec9 ri\u00eang D50 l\u00e0 kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 \u0111\u1ea1t ti\u00eau chu\u1ea9n EMC.
Ho\u00e1 h\u1ecdc: <\/strong>\u0110\u1ed9 tinh khi\u1ebft c\u1ee7a SiO2 (XRF), Fe2O3, Al2O3, Na2O, K2O, TiO2 (ICP-MS) \u2014 m\u1ed7i ch\u1ea5t \u0111\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb t\u1ed1i \u0111a \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn.
N\u1ed9i dung kh\u00f4ng x\u00e1c \u0111\u1ecbnh: <\/strong>Ph\u00e2n t\u00edch nhi\u1ec5u x\u1ea1 tia X \u0111\u1ecbnh l\u01b0\u1ee3ng (ph\u01b0\u01a1ng ph\u00e1p Rietveld) \u2014 \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn theo ph\u1ea7n tr\u0103m v\u00f4 \u0111\u1ecbnh h\u00ecnh
Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang: <\/strong>\u0110o l\u01b0\u1eddng BET \u2014 c\u00f3 li\u00ean quan \u0111\u1ebfn nhu c\u1ea7u ch\u1ea5t k\u1ebft d\u00ednh v\u00e0 d\u1ef1 \u0111o\u00e1n \u0111\u1ed9 nh\u1edbt trong c\u00f4ng th\u1ee9c EMC.
Ph\u00f3ng x\u1ea1: <\/strong>U v\u00e0 Th b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ebfm alpha ho\u1eb7c ICP-MS \u2014 c\u1ea7n thi\u1ebft cho chu\u1ed7i cung \u1ee9ng bao b\u00ec logic v\u00e0 b\u1ed9 nh\u1edb.
H\u00ecnh th\u00e1i h\u1ecdc: <\/strong>H\u00ecnh c\u1ea7u ho\u1eb7c h\u00ecnh g\u00f3c c\u1ea1nh, \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn b\u1eb1ng k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed qu\u00e9t (SEM) \u2014 c\u00f3 li\u00ean quan \u0111\u1ebfn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Giai \u0111o\u1ea1n 6 \u2014 X\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/h2>\n\n\n\n

Kh\u00f4ng ph\u1ea3i m\u1ecdi \u1ee9ng d\u1ee5ng silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed \u0111\u1ec1u c\u1ea7n x\u1eed l\u00fd b\u1ec1 m\u1eb7t, nh\u01b0ng c\u00e1c c\u00f4ng th\u1ee9c EMC c\u00f3 h\u00e0m l\u01b0\u1ee3ng ch\u1ea5t \u0111\u1ed9n cao th\u01b0\u1eddng c\u1ea7n. V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf h\u00f3a h\u1ecdc b\u1ec1 m\u1eb7t. Silica nung ch\u1ea3y nguy\u00ean ch\u1ea5t c\u00f3 b\u1ec1 m\u1eb7t \u01b0a n\u01b0\u1edbc \u0111\u01b0\u1ee3c bao ph\u1ee7 b\u1edfi c\u00e1c nh\u00f3m silanol (Si\u2013OH) t\u1ea1o li\u00ean k\u1ebft hydro v\u1edbi n\u01b0\u1edbc. Ma tr\u1eadn nh\u1ef1a epoxy l\u1ea1i k\u1ef5 n\u01b0\u1edbc. \u1ede h\u00e0m l\u01b0\u1ee3ng ch\u1ea5t \u0111\u1ed9n th\u1ea5p, nh\u1ef1a v\u1eabn c\u00f3 th\u1ec3 l\u00e0m \u01b0\u1edbt b\u1ec1 m\u1eb7t ch\u1ea5t \u0111\u1ed9n m\u1ed9t c\u00e1ch \u0111\u1ea7y \u0111\u1ee7 b\u1ea5t ch\u1ea5p s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch n\u00e0y. \u1ede h\u00e0m l\u01b0\u1ee3ng ch\u1ea5t \u0111\u1ed9n 80-85% theo tr\u1ecdng l\u01b0\u1ee3ng, h\u1eadu qu\u1ea3 v\u1ec1 \u0111\u1ed9 nh\u1edbt do l\u00e0m \u01b0\u1edbt b\u1ec1 m\u1eb7t kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ee7 nghi\u00eam tr\u1ecdng \u0111\u1ec3 ng\u0103n c\u1ea3n qu\u00e1 tr\u00ecnh \u0111\u00fac chuy\u1ec3n.<\/p>\n\n\n\n

Ch\u1ea5t li\u00ean k\u1ebft Silane<\/h3>\n\n\n\n

C\u00e1c ch\u1ea5t li\u00ean k\u1ebft silan gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y b\u1eb1ng c\u00e1ch ph\u1ea3n \u1ee9ng v\u1edbi c\u00e1c nh\u00f3m silanol tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 thay th\u1ebf ch\u00fang b\u1eb1ng c\u00e1c nh\u00f3m ch\u1ee9c h\u1eefu c\u01a1 t\u01b0\u01a1ng th\u00edch v\u1edbi h\u00f3a h\u1ecdc c\u1ee7a nh\u1ef1a epoxy. Ph\u1ea3n \u1ee9ng n\u00e0y g\u1eafn ph\u00e2n t\u1eed silan v\u00e0o b\u1ec1 m\u1eb7t silica th\u00f4ng qua li\u00ean k\u1ebft Si\u2013O\u2013Si; nh\u00f3m ch\u1ee9c h\u1eefu c\u01a1 \u1edf \u0111\u1ea7u (epoxy, amino ho\u1eb7c methacrylate t\u00f9y thu\u1ed9c v\u00e0o h\u1ec7 th\u1ed1ng nh\u1ef1a) sau \u0111\u00f3 ph\u1ea3n \u1ee9ng c\u00f9ng v\u1edbi nh\u1ef1a n\u1ec1n trong qu\u00e1 tr\u00ecnh \u0111\u00f3ng r\u1eafn.<\/p>\n\n\n\n

Silan ch\u1ee9c n\u0103ng epoxy (glycidoxypropyltrimethoxysilane) l\u00e0 ch\u1ea5t li\u00ean k\u1ebft ph\u1ed5 bi\u1ebfn nh\u1ea5t cho c\u00e1c h\u1ec7 th\u1ed1ng EMC epoxy bisphenol-A ti\u00eau chu\u1ea9n. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t s\u1eed d\u1ee5ng aminosilane khi h\u00f3a h\u1ecdc nh\u1ef1a \u01b0u ti\u00ean c\u00e1c ch\u1ea5t ph\u1ea3n \u1ee9ng ph\u1ee5 amin. Ph\u00e2n t\u00edch nhi\u1ec7t tr\u1ecdng l\u01b0\u1ee3ng (TGA) x\u00e1c minh \u0111\u1ed9 ph\u1ee7 c\u1ee7a l\u1edbp x\u1eed l\u00fd b\u1eb1ng c\u00e1ch \u0111o s\u1ef1 m\u1ea5t kh\u1ed1i l\u01b0\u1ee3ng t\u1eeb l\u1edbp ph\u1ee7 h\u1eefu c\u01a1. Ph\u00e9p \u0111o g\u00f3c ti\u1ebfp x\u00fac x\u00e1c nh\u1eadn s\u1ef1 chuy\u1ec3n \u0111\u1ed5i t\u1eeb \u01b0a n\u01b0\u1edbc sang k\u1ef5 n\u01b0\u1edbc.<\/p>\n\n\n\n

C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng \u01b0a chu\u1ed9ng ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd kh\u00f4 (silan pha kh\u00ed trong l\u00f2 ph\u1ea3n \u1ee9ng t\u1ea7ng s\u00f4i ho\u1eb7c l\u00f2 ph\u1ea3n \u1ee9ng va \u0111\u1eadp) \u0111\u1ed1i v\u1edbi silica nung ch\u1ea3y lo\u1ea1i m\u1ecbn c\u00f3 k\u00edch th\u01b0\u1edbc h\u1ea1t d\u01b0\u1edbi D50 5 \u03bcm. X\u1eed l\u00fd \u01b0\u1edbt \u1edf k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ecbn g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng v\u00f3n c\u1ee5c \u2013 ch\u1ea5t ph\u1ee7 d\u1ea1ng l\u1ecfng t\u1ea1o c\u1ea7u n\u1ed1i gi\u1eefa c\u00e1c h\u1ea1t li\u1ec1n k\u1ec1 tr\u01b0\u1edbc khi ph\u00e2n b\u1ed1 \u0111\u1ec1u. S\u1ea3n ph\u1ea9m b\u1ecb v\u00f3n c\u1ee5c c\u1ea7n \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u1ea1i, l\u00e0m t\u0103ng chi ph\u00ed v\u00e0 gi\u1ea3m n\u0103ng su\u1ea5t.<\/p>\n\n\n\n

Giai \u0111o\u1ea1n 7 \u2014 Ki\u1ec3m so\u00e1t \u00f4 nhi\u1ec5m tr\u00ean to\u00e0n b\u1ed9 chu\u1ed7i cung \u1ee9ng<\/h2>\n\n\n\n

Ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng ph\u1ea3n \u00e1nh hi\u1ec7u qu\u1ea3 t\u00edch l\u0169y c\u1ee7a vi\u1ec7c ki\u1ec3m so\u00e1t \u00f4 nhi\u1ec5m \u1edf m\u1ecdi giai \u0111o\u1ea1n. M\u1ed7i bi\u1ec7n ph\u00e1p sau \u0111\u00e2y gi\u1ea3i quy\u1ebft m\u1ed9t con \u0111\u01b0\u1eddng \u00f4 nhi\u1ec5m c\u1ee5 th\u1ec3 \u0111\u00e3 g\u00e2y ra l\u1ed7i trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed.<\/p>\n\n\n\n

T\u00e1ch t\u1eeb<\/h3>\n\n\n\n

C\u00e1c thi\u1ebft b\u1ecb t\u00e1ch t\u1eeb c\u00f3 \u0111\u1ed9 d\u1ed1c cao (10.000-15.000 Gauss) \u0111\u01b0\u1ee3c \u0111\u1eb7t sau m\u1ed7i giai \u0111o\u1ea1n gi\u1ea3m k\u00edch th\u01b0\u1edbc. C\u00e1c thi\u1ebft b\u1ecb t\u00e1ch t\u1eeb lo\u1ea1i b\u1ecf c\u00e1c h\u1ea1t m\u00e0i m\u00f2n s\u1eaft t\u1eeb t\u1eeb thi\u1ebft b\u1ecb \u1edf ph\u00eda tr\u01b0\u1edbc tr\u01b0\u1edbc khi ch\u00fang \u0111\u1ebfn giai \u0111o\u1ea1n ti\u1ebfp theo. C\u00e1c h\u1ea1t n\u00e0y bao g\u1ed3m c\u00e1c m\u1ea3nh v\u1ee1 c\u1ee7a t\u1ea5m h\u00e0m, v\u1ee5n bi nghi\u1ec1n v\u00e0 m\u1ea3nh v\u1ee1 l\u1edbp l\u00f3t. \u1ede k\u00edch th\u01b0\u1edbc nh\u1ecf, c\u00e1c h\u1ea1t t\u1eeb t\u00ednh r\u1ea5t nguy hi\u1ec3m\u2014ch\u00fang \u0111i qua c\u00e1c thi\u1ebft b\u1ecb ph\u00e2n lo\u1ea1i v\u00e0 ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u. M\u1ed9t h\u1ea1t s\u1eaft 2 \u03bcm trong silica D50 5 \u03bcm s\u1ebd kh\u00f4ng b\u1ecb ph\u00e1t hi\u1ec7n b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nhi\u1ec5u x\u1ea1 laser. N\u00f3 s\u1ebd \u0111\u01b0\u1ee3c thu gi\u1eef b\u1edfi HGMS ho\u1eb7c \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n b\u1eb1ng ICP-MS trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m cu\u1ed1i c\u00f9ng.<\/p>\n\n\n\n

Bao b\u00ec \u0111\u1ea1t ti\u00eau chu\u1ea9n ph\u00f2ng s\u1ea1ch<\/h3>\n\n\n\n

Sau khi s\u1ea3n ph\u1ea9m v\u01b0\u1ee3t qua kh\u00e2u ph\u00e2n lo\u1ea1i cu\u1ed1i c\u00f9ng, c\u1ea7n ph\u1ea3i ng\u0103n ng\u1eeba m\u1ecdi s\u1ef1 t\u00e1i nhi\u1ec5m b\u1ea9n. Vi\u1ec7c \u0111\u00f3ng g\u00f3i trong khu v\u1ef1c s\u1ea1ch c\u00f3 \u00e1p su\u1ea5t d\u01b0\u01a1ng v\u1edbi h\u1ec7 th\u1ed1ng l\u1ecdc HEPA gi\u00fap ng\u0103n ch\u1eb7n c\u00e1c h\u1ea1t b\u1ee5i trong kh\u00f4ng kh\u00ed x\u00e2m nh\u1eadp v\u00e0o c\u00e1c th\u00f9ng ch\u1ee9a s\u1ea3n ph\u1ea9m \u0111ang m\u1edf. T\u1ea5t c\u1ea3 c\u00e1c v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i ti\u1ebfp x\u00fac v\u1edbi s\u1ea3n ph\u1ea9m ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m \u0111\u1ecbnh v\u1ec1 h\u00e0m l\u01b0\u1ee3ng kim lo\u1ea1i v\u1ebft \u2014 m\u1ed9t s\u1ed1 lo\u1ea1i t\u00fai polyethylene c\u00f3 ch\u1ee9a ch\u1ea5t \u1ed5n \u0111\u1ecbnh nhi\u1ec7t g\u1ed1c kim lo\u1ea1i c\u00f3 th\u1ec3 r\u00f2 r\u1ec9 v\u00e0o silica nung ch\u1ea3y si\u00eau tinh khi\u1ebft.<\/p>\n\n\n\n

Pin QC cu\u1ed1i c\u00f9ng<\/h3>\n\n\n\n
B\u00e0i ki\u1ec3m tra<\/strong><\/td>D\u1ee5ng c\u1ee5<\/strong><\/td>N\u00f3 x\u00e1c minh \u0111i\u1ec1u g\u00ec<\/strong><\/td><\/tr>
Ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t<\/td>Nhi\u1ec5u x\u1ea1 laser (trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t + l\u00f4 cu\u1ed1i c\u00f9ng)<\/td>D10, D50, D90, D97, Dmax \u2014 c\u1ea3 n\u0103m gi\u00e1 tr\u1ecb n\u00e0y \u0111\u1ec1u ph\u1ea3i n\u1eb1m trong ph\u1ea1m vi quy \u0111\u1ecbnh.<\/td><\/tr>
\u0110\u1ed9 tinh khi\u1ebft h\u00f3a h\u1ecdc<\/td>XRF (c\u00e1c nguy\u00ean t\u1ed1 ch\u00ednh)<\/td>H\u00e0m l\u01b0\u1ee3ng SiO2 v\u00e0 c\u00e1c oxit t\u1ea1p ch\u1ea5t ch\u00ednh<\/td><\/tr>
kim lo\u1ea1i vi l\u01b0\u1ee3ng<\/td>ICP-MS<\/td>Fe, Al, Na, K, Ti v\u00e0 c\u00e1c nguy\u00ean t\u1ed1 kh\u00e1c \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh \u1edf m\u1ee9c ppm \u0111\u1ebfn d\u01b0\u1edbi ppm.<\/td><\/tr>
N\u1ed9i dung v\u00f4 \u0111\u1ecbnh h\u00ecnh<\/td>XRD (ph\u01b0\u01a1ng ph\u00e1p Rietveld)<\/td>H\u00e0m l\u01b0\u1ee3ng th\u1ea1ch anh tinh th\u1ec3 \u2014 ph\u1ea3i th\u1ea5p h\u01a1n gi\u1edbi h\u1ea1n quy \u0111\u1ecbnh.<\/td><\/tr>
Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang<\/td>BET (h\u1ea5p ph\u1ee5 nit\u01a1)<\/td>Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t t\u00ednh b\u1eb1ng m2\/g \u2014 li\u00ean quan \u0111\u1ebfn nhu c\u1ea7u ch\u1ea5t k\u1ebft d\u00ednh v\u00e0 \u0111\u1ed9 ph\u1ee7 silan.<\/td><\/tr>
Ph\u00f3ng x\u1ea1<\/td>Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ebfm h\u1ea1t alpha ho\u1eb7c ICP-MS \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh U\/Th<\/td>U v\u00e0 Th \u2014 c\u1ea7n thi\u1ebft cho vi\u1ec7c \u0111\u00f3ng g\u00f3i m\u1ea1ch logic v\u00e0 b\u1ed9 nh\u1edb ti\u00ean ti\u1ebfn<\/td><\/tr>
X\u00e1c minh x\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/td>TGA + g\u00f3c ti\u1ebfp x\u00fac<\/td>X\u00e1c nh\u1eadn \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a l\u1edbp ph\u1ee7 silane v\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i k\u1ef5 n\u01b0\u1edbc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
B\u1ea1n c\u1ea7n thi\u1ebft b\u1ecb nghi\u1ec1n ho\u1eb7c ph\u00e2n lo\u1ea1i cho silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed?<\/strong>
EPIC Powder Machinery cung c\u1ea5p m\u00e1y nghi\u1ec1n kh\u00ed n\u00e9n, m\u00e1y nghi\u1ec1n bi v\u1edbi l\u1edbp l\u00f3t g\u1ed1m v\u00e0 m\u00e1y ph\u00e2n lo\u1ea1i kh\u00ed nhi\u1ec1u t\u1ea7ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1eb7c bi\u1ec7t cho s\u1ea3n xu\u1ea5t silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed. T\u1ea5t c\u1ea3 c\u00e1c b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac v\u1edbi s\u1ea3n ph\u1ea9m \u0111\u1ec1u c\u00f3 s\u1eb5n b\u1eb1ng g\u1ed1m alumina ho\u1eb7c zirconia. Ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c th\u1eed nghi\u1ec7m ph\u00e2n lo\u1ea1i mi\u1ec5n ph\u00ed tr\u00ean nguy\u00ean li\u1ec7u \u0111\u1ea7u v\u00e0o c\u1ee7a b\u1ea1n tr\u01b0\u1edbc khi cam k\u1ebft s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb. H\u00e3y g\u1eedi cho ch\u00fang t\u00f4i PSD nguy\u00ean li\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt D50, D97 v\u00e0 Dmax m\u1ee5c ti\u00eau c\u1ee7a b\u1ea1n, ch\u00fang t\u00f4i s\u1ebd x\u00e1c nh\u1eadn nh\u1eefng g\u00ec c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c v\u00e0 ti\u1ebfn h\u00e0nh nghi\u1ec1n th\u1eed nghi\u1ec7m.\u00a0\u00a0<\/strong>
Y\u00eau c\u1ea7u d\u00f9ng th\u1eed ph\u00e2n lo\u1ea1i mi\u1ec5n ph\u00ed: www.quartz-grinding.com\/contact\u00a0\u00a0<\/strong>
Kh\u00e1m ph\u00e1 thi\u1ebft b\u1ecb x\u1eed l\u00fd silica nung ch\u1ea3y c\u1ee7a ch\u00fang t\u00f4i: www.quartz-grinding.com<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa silica nung ch\u1ea3y v\u00e0 silica hun kh\u00f3i l\u00e0 g\u00ec \u2014 ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau l\u00e0m ch\u1ea5t \u0111\u1ed9n EMC kh\u00f4ng?<\/h3>\n\n\n\n

C\u00e1c quy tr\u00ecnh ho\u00e0n to\u00e0n kh\u00e1c nhau t\u1ea1o ra nh\u1eefng v\u1eadt li\u1ec7u n\u00e0y \u1edf c\u00e1c thang k\u00edch th\u01b0\u1edbc h\u1ea1t ho\u00e0n to\u00e0n kh\u00e1c nhau. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t nung ch\u1ea3y silica nung ch\u1ea3y \u1edf nhi\u1ec7t \u0111\u1ed9 tr\u00ean 1.720\u00b0C, sau \u0111\u00f3 nghi\u1ec1n n\u00f3 th\u00e0nh D50 1-15 \u03bcm \u0111\u1ec3 l\u00e0m ch\u1ea5t \u0111\u1ed9n EMC. Silica nung ch\u1ea3y l\u00e0m gi\u1ea3m c\u1ea5u tr\u00fac h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t (CTE) c\u1ee7a v\u1eadt li\u1ec7u composite th\u00f4ng qua h\u00e0m l\u01b0\u1ee3ng cao \u1edf m\u1ee9c 70-85% theo tr\u1ecdng l\u01b0\u1ee3ng.<\/p>\n\n\n\n

Qu\u00e1 tr\u00ecnh \u0111\u1ed1t b\u1eb1ng ng\u1ecdn l\u1eeda t\u1ea1o ra silica kh\u00f3i, cho ra c\u00e1c h\u1ea1t c\u00f3 k\u00edch th\u01b0\u1edbc 10-20 nm v\u1edbi di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t 50-400 m\u00b2\/g. Vai tr\u00f2 c\u1ee7a n\u00f3 l\u00e0 \u0111i\u1ec1u h\u00f2a l\u01b0u bi\u1ebfn \u2013 n\u00f3 ki\u1ec3m so\u00e1t d\u00f2ng ch\u1ea3y v\u00e0 t\u00ednh ch\u1ea5t thixotropy \u1edf m\u1ee9c \u0111\u1ed9 b\u1ed5 sung 0,1-1%. Silica kh\u00f3i khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t \u0111\u1ed9n c\u1ea5u tr\u00fac s\u1ebd c\u1ea7n l\u01b0\u1ee3ng ch\u1ea5t k\u1ebft d\u00ednh qu\u00e1 m\u1ee9c \u0111\u1ec3 l\u00e0m \u01b0\u1edbt di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a n\u00f3. Silica nung ch\u1ea3y khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh l\u01b0u bi\u1ebfn kh\u00f4ng hi\u1ec7u qu\u1ea3 do di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb kh\u1ed1i l\u01b0\u1ee3ng th\u1ea5p.<\/p>\n\n\n\n

Chi ph\u00ed s\u1ea3n xu\u1ea5t t\u0103ng th\u00eam khi chuy\u1ec3n t\u1eeb D97 25 \u03bcm (ti\u00eau chu\u1ea9n EMC) sang D97 8 \u03bcm (lo\u1ea1i b\u01b0\u1edbc s\u00f3ng nh\u1ecf) l\u00e0 bao nhi\u00eau?<\/h3>\n\n\n\n

Ba y\u1ebfu t\u1ed1 chi ph\u00ed c\u1ed9ng d\u1ed3n khi \u0111\u1ed9 ch\u00ednh x\u00e1c c\u00e0ng cao. Vi\u1ec7c nghi\u1ec1n b\u1eb1ng tia kh\u00ed n\u00e9n \u0111\u1ebfn D50 3 \u03bcm t\u1ed1n k\u00e9m h\u01a1n 3-4 l\u1ea7n v\u1ec1 kh\u00ed n\u00e9n so v\u1edbi nghi\u1ec1n \u0111\u1ebfn D50 8 \u03bcm. \u0110\u1ea1t \u0111\u01b0\u1ee3c D97 d\u01b0\u1edbi 10 \u03bcm \u0111\u00f2i h\u1ecfi ph\u00e2n lo\u1ea1i nhi\u1ec1u giai \u0111o\u1ea1n v\u1edbi n\u0103ng su\u1ea5t th\u1ea5p h\u01a1n 40-60%. C\u00e1c lo\u1ea1i h\u1ea1t m\u1ecbn c\u00f3 t\u1ef7 l\u1ec7 t\u00e1i ch\u1ebf cao h\u01a1n, l\u00e0m t\u0103ng chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng tr\u00ean m\u1ed7i t\u1ea5n s\u1ea3n ph\u1ea9m \u0111\u1ea1t ti\u00eau chu\u1ea9n. Lo\u1ea1i h\u1ea1t si\u00eau m\u1ecbn WLP (D50 1-3 \u03bcm) c\u00f3 chi ph\u00ed cao h\u01a1n 3-5 l\u1ea7n so v\u1edbi lo\u1ea1i h\u1ea1t ti\u00eau chu\u1ea9n EMC t\u1eeb c\u00f9ng m\u1ed9t nguy\u00ean li\u1ec7u th\u00f4.<\/p>\n\n\n\n

Thi\u1ebft b\u1ecb c\u1ee7a EPIC Powder Machinery c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng to\u00e0n b\u1ed9 chu\u1ed7i s\u1ea3n xu\u1ea5t silica nung ch\u1ea3y c\u1ea5p \u0111i\u1ec7n t\u1eed kh\u00f4ng?<\/h3>\n\n\n\n

M\u00e1y m\u00f3c b\u1ed9t EPIC<\/a> Ch\u00fang t\u00f4i cung c\u1ea5p thi\u1ebft b\u1ecb cho giai \u0111o\u1ea1n 4 v\u00e0 5 c\u1ee7a chu\u1ed7i s\u1ea3n xu\u1ea5t \u2014 nghi\u1ec1n m\u1ecbn v\u00e0 ph\u00e2n lo\u1ea1i. \u0110\u1ed1i v\u1edbi nghi\u1ec1n m\u1ecbn: m\u00e1y nghi\u1ec1n t\u1ea7ng s\u00f4i v\u1edbi b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac b\u1eb1ng g\u1ed1m cho c\u00e1c lo\u1ea1i m\u1ecbn v\u00e0 si\u00eau m\u1ecbn (D50 d\u01b0\u1edbi 5 \u03bcm), v\u00e0 m\u00e1y nghi\u1ec1n bi l\u00f3t g\u1ed1m trong m\u1ea1ch k\u00edn v\u1edbi b\u1ed9 ph\u00e2n lo\u1ea1i kh\u00ed cho c\u00e1c lo\u1ea1i ti\u00eau chu\u1ea9n v\u00e0 trung b\u00ecnh (D50 5-15 \u03bcm). \u0110\u1ed1i v\u1edbi ph\u00e2n lo\u1ea1i: b\u1ed9 ph\u00e2n lo\u1ea1i kh\u00ed \u0111\u1ed9ng m\u1ed9t t\u1ea7ng cho c\u00e1c lo\u1ea1i EMC ti\u00eau chu\u1ea9n (D97 d\u01b0\u1edbi 25 \u03bcm) v\u00e0 h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i nhi\u1ec1u t\u1ea7ng v\u1edbi h\u00ecnh h\u1ecdc b\u1ed9 ph\u00e2n lo\u1ea1i n\u1eb1m ngang cho c\u00e1c lo\u1ea1i c\u00f3 b\u01b0\u1edbc ren m\u1ecbn v\u00e0 WLP (D97 d\u01b0\u1edbi 10-12 \u03bcm). T\u1ea5t c\u1ea3 c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1ec1u c\u00f3 s\u1eb5n t\u00ednh n\u0103ng gi\u00e1m s\u00e1t nhi\u1ec5u x\u1ea1 laser t\u00edch h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n b\u1ed9 ph\u00e2n lo\u1ea1i. Ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c th\u1eed nghi\u1ec7m ph\u00e2n lo\u1ea1i mi\u1ec5n ph\u00ed tr\u00ean nguy\u00ean li\u1ec7u silica nung ch\u1ea3y do kh\u00e1ch h\u00e0ng cung c\u1ea5p t\u1ea1i c\u01a1 s\u1edf th\u1eed nghi\u1ec7m c\u1ee7a ch\u00fang t\u00f4i, thu \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 d\u1eef li\u1ec7u v\u1ec1 PSD, di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ed9 nhi\u1ec5m b\u1ea9n tr\u01b0\u1edbc khi cam k\u1ebft mua thi\u1ebft b\u1ecb.<\/p>\n\n\n\n

\n