{"id":16483,"date":"2026-01-27T06:21:28","date_gmt":"2026-01-27T06:21:28","guid":{"rendered":"https:\/\/www.epicmicron.com\/?p=16483"},"modified":"2026-01-28T06:02:38","modified_gmt":"2026-01-28T06:02:38","slug":"severe-material-buildup-on-walls-during-grinding-5-step-solution-guide","status":"publish","type":"post","link":"https:\/\/www.epicmicron.com\/vi\/severe-material-buildup-on-walls-during-grinding-5-step-solution-guide\/","title":{"rendered":"Hi\u1ec7n t\u01b0\u1ee3ng t\u00edch t\u1ee5 v\u1eadt li\u1ec7u nghi\u00eam tr\u1ecdng tr\u00ean th\u00e0nh m\u00e1y trong qu\u00e1 tr\u00ecnh m\u00e0i: H\u01b0\u1edbng d\u1eabn gi\u1ea3i ph\u00e1p 5 b\u01b0\u1edbc"},"content":{"rendered":"

Have you encountered significant material buildup on the inner walls when grinding barium titanate using a jet mill? This article introduces how to effectively address wall adhesion issues during the grinding process.<\/p>\n\n\n\n

\"s\u1ef1
S\u1ef1 t\u00edch t\u1ee5 v\u1eadt ch\u1ea5t<\/figcaption><\/figure>\n\n\n\n

B\u01b0\u1edbc 1: Hi\u1ec3u r\u00f5 nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a s\u1ef1 t\u00edch t\u1ee5<\/mark><\/h2>\n\n\n\n

V\u1ec1 c\u01a1 b\u1ea3n, s\u1ef1 b\u00e1m d\u00ednh v\u00e0o th\u00e0nh t\u01b0\u1eddng b\u1eaft ngu\u1ed3n t\u1eeb c\u00e1c l\u1ef1c m\u1ea1nh gi\u1eefa c\u00e1c h\u1ea1t v\u00e0 gi\u1eefa h\u1ea1t v\u1edbi th\u00e0nh t\u01b0\u1eddng, bao g\u1ed3m l\u1ef1c van der Waals, l\u1ef1c h\u00fat t\u0129nh \u0111i\u1ec7n, l\u1ef1c mao d\u1eabn v\u00e0 s\u1ef1 b\u00e1m d\u00ednh do bi\u1ebfn d\u1ea1ng d\u1ebbo. C\u00f3 n\u0103m y\u1ebfu t\u1ed1 ch\u00ednh g\u00f3p ph\u1ea7n v\u00e0o hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y:<\/p>\n\n\n\n

H\u00e0m l\u01b0\u1ee3ng \u0111\u1ed9 \u1ea9m qu\u00e1 cao:<\/strong> Ngay c\u1ea3 m\u1ed9t l\u01b0\u1ee3ng h\u01a1i \u1ea9m r\u1ea5t nh\u1ecf (<0,5%) c\u0169ng c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 b\u00e1m d\u00ednh c\u1ee7a c\u00e1c h\u1ea1t.<\/p>\n\n\n\n

K\u00edch th\u01b0\u1edbc h\u1ea1t si\u00eau m\u1ecbn (<10 \u03bcm):<\/strong> Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u1edbn v\u00e0 n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t cao th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh k\u1ebft t\u1ee5.<\/p>\n\n\n\n

\u0110i\u1ec3m h\u00f3a m\u1ec1m th\u1ea5p ho\u1eb7c \u0111\u1ed9 nh\u1ea1y nhi\u1ec7t:<\/strong> Nhi\u1ec7t \u0111\u1ed9 khi nghi\u1ec1n c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng n\u00f3ng ch\u1ea3y ho\u1eb7c m\u1ec1m c\u1ee5c b\u1ed9.<\/p>\n\n\n\n

T\u00edch t\u1ee5 t\u0129nh \u0111i\u1ec7n:<\/strong> Ma s\u00e1t trong m\u00f4i tr\u01b0\u1eddng kh\u00f4 t\u1ea1o ra \u0111i\u1ec7n t\u00edch t\u0129nh, khi\u1ebfn c\u00e1c h\u1ea1t b\u00e1m d\u00ednh v\u00e0o b\u1ec1 m\u1eb7t kim lo\u1ea1i.<\/p>\n\n\n\n

Thi\u1ebfu ch\u1ea5t h\u1ed7 tr\u1ee3 nghi\u1ec1n:<\/strong> Kh\u00f4ng ch\u1ee9a c\u00e1c ch\u1ea5t ph\u1ee5 gia ch\u1ed1ng d\u00ednh, ph\u00e2n t\u00e1n ho\u1eb7c b\u00f4i tr\u01a1n.<\/p>\n\n\n\n

B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1<\/mark><\/h2>\n\n\n\n

Ch\u00fang ta c\u1ea7n ph\u00e2n bi\u1ec7t xem s\u1ef1 b\u00e1m d\u00ednh l\u00e0 do h\u1ea5p ph\u1ee5 v\u1eadt l\u00fd (l\u1ef1c van der Waals, t\u0129nh \u0111i\u1ec7n), b\u00e1m d\u00ednh h\u00f3a h\u1ecdc (c\u00e1c nh\u00f3m ch\u1ee9c tr\u00ean b\u1ec1 m\u1eb7t) hay do l\u00e0m m\u1ec1m\/tan ch\u1ea3y nhi\u1ec7t. H\u00e3y \u0111\u1eb7t ra ba c\u00e2u h\u1ecfi ch\u1ea9n \u0111o\u00e1n sau:<\/p>\n\n\n\n

Ch\u1ea5t li\u1ec7u l\u00e0 g\u00ec?<\/mark><\/h3>\n\n\n\n

N\u00f3 l\u00e0 ch\u1ea5t v\u00f4 c\u01a1 (v\u00ed d\u1ee5: canxi cacbonat, alumina), ch\u1ea5t h\u1eefu c\u01a1 (v\u00ed d\u1ee5: nh\u1ef1a, s\u00e1p, API) hay ch\u1ea5t h\u1ed7n h\u1ee3p? N\u00f3 c\u00f3 ch\u1ee9a \u0111\u01b0\u1eddng, polyphenol, d\u1ea7u, ch\u1ea5t b\u00e9o, ho\u1eb7c c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 \u0111i\u1ec3m n\u00f3ng ch\u1ea3y th\u1ea5p kh\u00f4ng? <\/p>\n\n\n\n

C\u00e2u h\u1ecfi c\u1ea7n \u0111\u1eb7t ra<\/strong><\/td>T\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3<\/strong><\/td>C\u01a1 ch\u1ebf b\u00e1m d\u00ednh th\u00e0nh t\u01b0\u1eddng ch\u1ee7 \u0111\u1ea1o<\/strong><\/td>Bi\u1ec3u hi\u1ec7n\/D\u1ea5u hi\u1ec7u \u0111i\u1ec3n h\u00ecnh<\/strong><\/td>T\u1eeb kh\u00f3a\/C\u01a1 s\u1edf<\/strong><\/td><\/tr>
Ch\u1ea5t li\u1ec7u l\u00e0 g\u00ec?<\/td>V\u00f4 c\u01a1<\/td>Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u1edbn + h\u1ea5p ph\u1ee5 t\u0129nh \u0111i\u1ec7n 

S\u1ef1 v\u1eadn chuy\u1ec3n h\u01a1i \u1ea9m (l\u1ef1c mao d\u1eabn)<\/td>		B\u1ed9t tr\u00f4ng c\u00f3 v\u1ebb kh\u00f4 nh\u01b0ng l\u1ea1i "m\u1ec1m m\u1ecbn v\u00e0 kh\u00f3 t\u00e1n \u0111\u1ec1u".\u201c 

S\u1ef1 h\u00ecnh th\u00e0nh l\u1edbp b\u00e1nh khi x\u1ea3<\/td>		D50 < 10 \u03bcm

H\u00e0m l\u01b0\u1ee3ng \u1ea9m > 0,1%

\u0110i\u1ec7n tr\u1edf su\u1ea5t cao<\/td><\/tr>
H\u1eefu c\u01a1<\/td>L\u00e0m m\u1ec1m\/n\u00f3ng ch\u1ea3y b\u1eb1ng nhi\u1ec7t (T \u2265 Tg\/Tm) 

S\u1ef1 v\u01b0\u1edbng m\u1eafc nh\u1edbt \u0111\u00e0n h\u1ed3i c\u1ee7a chu\u1ed7i ph\u00e2n t\u1eed<\/td>		Hi\u1ec7n t\u01b0\u1ee3ng d\u00ednh v\u00e0o t\u01b0\u1eddng tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng h\u01a1n sau 30 ph\u00fat ho\u1ea1t \u0111\u1ed9ng. 

L\u1edbp m\u00e0ng d\u1ea7u ho\u1eb7c m\u00e0ng trong su\u1ed1t

C\u1eb7n b\u1ea9n b\u00ean trong khoang<\/td>		DSC cho th\u1ea5y Tg\/Tm < 80\u00b0C 

Nhi\u1ec7t \u0111\u1ed9 ph\u00f3ng \u0111i\u1ec7n g\u1ea7n v\u1edbi Tg

D\u00f2ng \u0111i\u1ec7n hi\u1ec7n t\u1ea1i t\u0103ng d\u1ea7n theo th\u1eddi gian<\/td><\/tr>
H\u1ec7 th\u1ed1ng t\u1ed5ng h\u1ee3p<\/td>S\u1ef1 k\u1ebft d\u00ednh hi\u1ec7p \u0111\u1ed3ng \u0111a th\u00e0nh ph\u1ea7n (c\u1ee9ng + m\u1ec1m + d\u1ea7u) 

H\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m \u2013 gi\u1ea3i ph\u00f3ng nhi\u1ec7t \u2013 \u0111\u1ed9 b\u00e1m d\u00ednh \u2013 v\u00f2ng ph\u1ea3n h\u1ed3i t\u00edch c\u1ef1c<\/td>		Ban \u0111\u1ea7u b\u00ecnh th\u01b0\u1eddng, nh\u01b0ng nhanh ch\u00f3ng x\u1ea5u \u0111i sau \u0111\u00f3. 

C\u1eb7n c\u00f2n l\u1ea1i c\u00f3 m\u00e0u v\u00e0ng nh\u1ea1t, d\u1ea1ng c\u1ee5c dai v\u00e0 \u1ed5n \u0111\u1ecbnh. 

M\u00f9i kh\u00e9t nh\u1eb9<\/td>		Thay \u0111\u1ed5i m\u00e0u s\u1eafc, \u0111\u1ed9 \u0111\u1ee5c m\u00e0u tr\u1eafng, PEG, c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 \u0111i\u1ec3m n\u00f3ng ch\u1ea3y th\u1ea5p 

H\u00fat \u1ea9m (nh\u1ea1y c\u1ea3m v\u1edbi \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i) 

Ph\u00e2n t\u00edch nhi\u1ec7t tr\u1ecdng l\u01b0\u1ee3ng (TGA) cho th\u1ea5y s\u1ef1 gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

N\u00f3 \u0111ang b\u1ecb k\u1eb9t \u1edf \u0111\u00e2u?<\/mark><\/h3>\n\n\n\n

Th\u00e0nh bu\u1ed3ng nghi\u1ec1n? Tr\u1ee5c khu\u1ea5y? C\u1eeda x\u1ea3? Khu v\u1ef1c l\u01b0\u1edbi l\u1ecdc\/khe h\u1edf? L\u1edbp m\u00e0ng b\u00e1m \u0111\u1ec1u hay ch\u1ec9 t\u00edch t\u1ee5 c\u1ee5c b\u1ed9?<\/p>\n\n\n\n

C\u00e2u h\u1ecfi c\u1ea7n \u0111\u1eb7t ra<\/strong><\/strong><\/td>T\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3<\/strong><\/strong><\/td>C\u01a1 ch\u1ebf b\u00e1m d\u00ednh th\u00e0nh t\u01b0\u1eddng ch\u1ee7 \u0111\u1ea1o<\/strong><\/strong><\/td>Bi\u1ec3u hi\u1ec7n\/D\u1ea5u hi\u1ec7u \u0111i\u1ec3n h\u00ecnh<\/strong><\/strong><\/td>C\u01a1 s\u1edf ph\u00e1n \u0111o\u00e1n ch\u00ednh<\/strong><\/strong><\/td><\/tr>
V\u1ecb tr\u00ed b\u00e1m d\u00ednh<\/td>Th\u00e0nh trong c\u1ee7a xi lanh<\/td>M\u00e1y ly t\u00e2m phun b\u1ed9t + kh\u00f4ng c\u1ea7n c\u1ea1o 

Hi\u1ec7u \u1ee9ng ng\u01b0ng t\u1ee5 tr\u00ean b\u1ec1 m\u1eb7t t\u01b0\u1eddng 

H\u1ea5p ph\u1ee5 tr\u01b0\u1eddng t\u0129nh \u0111i\u1ec7n t\u1eadp trung<\/td>		Th\u00e0nh trong \u0111\u01b0\u1ee3c ph\u1ee7 \u0111\u1ec1u b\u1eb1ng b\u1ed9t. 

T\u1ea1o th\u00e0nh m\u1ed9t l\u1edbp m\u00e0ng c\u1ee9ng\/dai nh\u01b0 cao su sau khi t\u1eaft m\u00e1y.<\/td>		Ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u. Kh\u00f4ng c\u00f3 \u0111i\u1ec3m t\u00edch t\u1ee5 r\u00f5 r\u00e0ng.<\/td><\/tr>
G\u1ed1c tr\u1ee5c\/c\u00e1nh khu\u1ea5y<\/td>l\u1eafng \u0111\u1ecdng v\u00f9ng ch\u1ebft d\u00f2ng ch\u1ea3y

N\u00e9n khe h\u1edf gi\u1eefa tr\u1ee5c v\u00e0 khoang

S\u1ef1 gia nhi\u1ec7t v\u00e0 l\u00e0m m\u1ec1m c\u1ee5c b\u1ed9 do ma s\u00e1t<\/td>		Kh\u1ed1i u c\u1ee9ng h\u00ecnh v\u00f2ng \u1edf g\u1ed1c th\u00e2n  

M\u00f4-men xo\u1eafn c\u1ee7a m\u00e1y khu\u1ea5y dao \u0111\u1ed9ng <\/td>		T\u00edch t\u1ee5 c\u1ee5c b\u1ed9, \u0111\u1ed1i x\u1ee9ng. Kho\u1ea3ng c\u00e1ch < 2 mm.<\/td><\/tr>
C\u1ed5ng x\u1ea3\/m\u00e0ng l\u1ecdc\/khe h\u1edf<\/td>Gi\u1ea3m v\u1eadn t\u1ed1c d\u00f2ng ch\u1ea3y \u0111\u1ed9t ng\u1ed9t + t\u0103ng th\u1eddi gian l\u01b0u tr\u00fa T

T\u1eafc ngh\u1ebdn do c\u1ea7u n\u1ed1i m\u00e0n h\u00ecnh 

Gia nhi\u1ec7t b\u1eb1ng l\u1ef1c c\u1eaft + n\u00e9n trong khe h\u1edf = thi\u00eau k\u1ebft<\/td>		 X\u1ea3 gi\u00e1n \u0111o\u1ea1n\/k\u1eb9t 

M\u00e0n h\u00ecnh b\u1ecb ch\u1eb7n m\u1ed9t ph\u1ea7n 

C\u00e1c xung \u0111i\u1ec7n hi\u1ec7n t\u1ea1i<\/td>		Hi\u1ec7n t\u01b0\u1ee3ng b\u00e1m d\u00ednh v\u00e0o t\u01b0\u1eddng t\u1eadp trung g\u1ea7n \u1ed5 c\u1eafm. Quan s\u00e1t th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y trong qu\u00e1 tr\u00ecnh ki\u1ec3m tra khi t\u1eaft m\u00e1y.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Khi n\u00e0o th\u00ec n\u00f3 b\u1eaft \u0111\u1ea7u b\u1ecb d\u00ednh?<\/mark><\/h3>\n\n\n\n

Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y x\u1ea3y ra ngay khi kh\u1edfi \u0111\u1ed9ng? Hay sau m\u1ed9t th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng nh\u1ea5t \u0111\u1ecbnh (v\u00ed d\u1ee5: 30 ph\u00fat)? C\u00f3 k\u00e8m theo hi\u1ec7n t\u01b0\u1ee3ng t\u0103ng nhi\u1ec7t \u0111\u1ed9, dao \u0111\u1ed9ng d\u00f2ng \u0111i\u1ec7n ho\u1eb7c x\u1ea3 \u0111i\u1ec7n ch\u1eadm l\u1ea1i kh\u00f4ng?<\/p>\n\n\n\n

C\u00e2u h\u1ecfi c\u1ea7n \u0111\u1eb7t ra<\/strong><\/strong><\/td>T\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3<\/strong><\/strong><\/td>C\u01a1 ch\u1ebf k\u1ebft t\u1ee5 ch\u1ee7 y\u1ebfu<\/strong><\/strong><\/td>Bi\u1ec3u hi\u1ec7n\/D\u1ea5u hi\u1ec7u \u0111i\u1ec3n h\u00ecnh<\/strong><\/strong><\/td>C\u01a1 s\u1edf ph\u00e1n \u0111o\u00e1n ch\u00ednh<\/strong><\/strong><\/td><\/tr>
 Th\u1eddi \u0111i\u1ec3m x\u1ea3y ra<\/td>X\u1ea3y ra ngay l\u1eadp t\u1ee9c khi kh\u1edfi \u0111\u1ed9ng<\/td>\u0110\u1ed9 \u1ea9m\/h\u00e0m l\u01b0\u1ee3ng ban \u0111\u1ea7u c\u1ee7a nguy\u00ean li\u1ec7u th\u00f4 

L\u00e0m n\u00f3ng thi\u1ebft b\u1ecb tr\u01b0\u1edbc ho\u1eb7c c\u1eb7n c\u00f2n s\u00f3t l\u1ea1i t\u1eeb m\u1ebb tr\u01b0\u1edbc 

S\u1ef1 ph\u00f3ng \u0111i\u1ec7n t\u0129nh ban \u0111\u1ea7u<\/td>		Hi\u1ec7n t\u01b0\u1ee3ng v\u00f3n c\u1ee5c nghi\u00eam tr\u1ecdng ngay t\u1eeb m\u1ebb \u0111\u1ea7u ti\u00ean. 

Kh\u1ea3 n\u0103ng ch\u1ea3y c\u1ee7a b\u1ed9t k\u00e9m (g\u00f3c ngh\u1ec9 > 50\u00b0)<\/td>		X\u1ea3y ra ngay l\u1eadp t\u1ee9c 

\u0110\u1ed9c l\u1eadp v\u1edbi th\u1eddi gian ch\u1ea1y  <\/td><\/tr>
Xu\u1ea5t hi\u1ec7n sau 20-60 ph\u00fat k\u1ec3 t\u1eeb khi ph\u1eabu thu\u1eadt.<\/td>Nhi\u1ec7t \u0111\u1ed9 t\u0103ng g\u1ea7n b\u1eb1ng Tg\/Tm 

H\u01a1i \u1ea9m b\u00ean trong c\u01a1 th\u1ec3 di chuy\u1ec3n ra b\u1ec1 m\u1eb7t do nhi\u1ec7t \u0111\u1ed9. 

S\u1ef1 suy gi\u1ea3m c\u00e1c ch\u1ea5t ph\u1ee5 gia d\u1ec5 bay h\u01a1i<\/td>		D\u00f2ng \u0111i\u1ec7n ban \u0111\u1ea7u gi\u1ea3m (\u0111\u1ed9 m\u1ecbn) sau \u0111\u00f3 t\u0103ng (s\u1ef1 k\u1ebft t\u1ee5). 

Nhi\u1ec7t \u0111\u1ed9 x\u1ea3 li\u00ean t\u1ee5c t\u0103ng 

Hi\u1ec7n t\u01b0\u1ee3ng v\u00f3n c\u1ee5c x\u1ea3y ra kh\u00f4ng li\u00ean t\u1ee5c\/ho\u1eb7c tr\u1edf n\u00ean t\u1ed3i t\u1ec7 h\u01a1n theo th\u1eddi gian.<\/td>		S\u1ef1 xu\u1ea5t hi\u1ec7n mu\u1ed9n 

C\u00f3 m\u1ed1i t\u01b0\u01a1ng quan ch\u1eb7t ch\u1ebd v\u1edbi s\u1ef1 gia t\u0103ng nhi\u1ec7t \u0111\u1ed9.<\/td><\/tr>
K\u00e8m theo \u0111\u00f3 l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng t\u0103ng nhi\u1ec7t \u0111\u1ed9, dao \u0111\u1ed9ng d\u00f2ng \u0111i\u1ec7n v\u00e0 gi\u1ea3m t\u1ed1c \u0111\u1ed9 ph\u00f3ng \u0111i\u1ec7n.<\/td>H\u1ec7 th\u1ed1ng m\u1ea5t ki\u1ec3m so\u00e1t. L\u1edbp b\u00e1nh g\u00e2y ra t\u1ea3i tr\u1ecdng kh\u00f4ng \u0111\u1ec1u. 

M\u1ea5t kh\u1ea3 n\u0103ng ch\u1ea3y (t\u1ef7 l\u1ec7 Hausner > 1,4)<\/td>		Ngu\u1ed3n \u0111i\u1ec7n c\u1ee7a m\u00e1y ch\u1ee7 bi\u1ebfn \u0111\u1ed9ng m\u1ea1nh.

T\u1ed1c \u0111\u1ed9 x\u1ea3 gi\u1ea3m m\u1ea1nh 

Qu\u00e1 nhi\u1ec7t c\u1ee5c b\u1ed9 (\u0111o nhi\u1ec7t \u0111\u1ed9 b\u1eb1ng tia h\u1ed3ng ngo\u1ea1i)<\/td>		Nhi\u1ec1u th\u00f4ng s\u1ed1 b\u1ea5t th\u01b0\u1eddng \u0111\u1ed3ng th\u1eddi

T\u00edn hi\u1ec7u b\u1ea5t \u1ed5n h\u1ec7 th\u1ed1ng<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \n
  1. <\/li>\n<\/ol>\n\n\n\n

    B\u01b0\u1edbc 3: Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/mark><\/h2>\n\n\n\n

    Ch\u00fang t\u00f4i \u0111\u1ec1 xu\u1ea5t \u201cPh\u01b0\u01a1ng ph\u00e1p \u201d4M1E\u201d<\/strong> \u0110\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ed9t c\u00e1ch c\u00f3 h\u1ec7 th\u1ed1ng: V\u1eadt li\u1ec7u, M\u00e1y m\u00f3c, Ph\u01b0\u01a1ng ph\u00e1p, M\u00f4i tr\u01b0\u1eddng<\/strong> (v\u1eadt li\u1ec7u m\u00e0i), v\u00e0 M\u00f4i tr\u01b0\u1eddng<\/strong>. M\u1eb7c d\u00f9 chi ti\u1ebft, \u0111\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1ng tin c\u1eady nh\u1ea5t khi vi\u1ec7c x\u00e1c \u0111\u1ecbnh tr\u1ef1c ti\u1ebfp g\u1eb7p kh\u00f3 kh\u0103n, \u0111\u1ea3m b\u1ea3o kh\u00f4ng b\u1ecf s\u00f3t b\u1ea5t k\u1ef3 nguy\u00ean nh\u00e2n ti\u1ec1m \u1ea9n n\u00e0o.<\/p>\n\n\n\n

    K\u00edch th\u01b0\u1edbc<\/strong><\/th>C\u00e1c y\u1ebfu t\u1ed1 c\u00f3 th\u1ec3<\/strong><\/th>\u0110i\u1ec3m ki\u1ec3m tra<\/strong><\/th><\/tr><\/thead>
    V\u1eadt li\u1ec7u<\/strong><\/td>H\u00e0m l\u01b0\u1ee3ng \u1ea9m cao, k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ecbn, di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u1edbn, \u0111i\u1ec3m h\u00f3a m\u1ec1m th\u1ea5p, t\u00edch \u0111i\u1ec7n t\u0129nh m\u1ea1nh.<\/td>\u0110o \u0111\u1ed9 \u1ea9m (Karl Fischer), \u0111o nhi\u1ec7t l\u01b0\u1ee3ng k\u1ebf vi sai (DSC) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m n\u00f3ng ch\u1ea3y\/Tg, \u0111i\u1ec7n th\u1ebf Zeta ho\u1eb7c \u0111i\u1ec7n tr\u1edf su\u1ea5t.<\/td><\/tr>
    M\u00e1y m\u00f3c<\/strong><\/td>Th\u00e0nh trong th\u00f4 r\u00e1p, kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac c\u1ea1o th\u00e0nh, kh\u1ea3 n\u0103ng l\u00e0m m\u00e1t kh\u00f4ng \u0111\u1ee7, \u0111\u1ed9 m\u00e0i m\u00f2n trung b\u00ecnh<\/td>Ki\u1ec3m tra ch\u1ea5t li\u1ec7u l\u00f3t, lo\u1ea1i b\u1ed9 ph\u1eadn khu\u1ea5y, xem \u00e1o kho\u00e1c c\u00f3 s\u1eed d\u1ee5ng m\u00f4i ch\u1ea5t l\u00e0m m\u00e1t hay kh\u00f4ng.<\/td><\/tr>
    Ph\u01b0\u01a1ng ph\u00e1p<\/strong><\/td>T\u1ed1c \u0111\u1ed9 quay qu\u00e1 cao, t\u1ef7 l\u1ec7 n\u1ea1p kh\u00f4ng ph\u00f9 h\u1ee3p, v\u1eadn h\u00e0nh li\u00ean t\u1ee5c trong th\u1eddi gian d\u00e0i.<\/td>Ghi l\u1ea1i \u0111\u01b0\u1eddng cong c\u00f4ng su\u1ea5t, t\u1ed1c \u0111\u1ed9 t\u0103ng nhi\u1ec7t \u0111\u1ed9, s\u1ef1 thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc h\u1ea1t th\u1ea3i ra.<\/td><\/tr>
    Ch\u1ea5t li\u1ec7u nghi\u1ec1n<\/strong><\/td>K\u00edch th\u01b0\u1edbc kh\u00f4ng ph\u00f9 h\u1ee3p, v\u1eadt li\u1ec7u d\u1ec5 b\u1ecb h\u1ea5p ph\u1ee5, \u00f4 nhi\u1ec5m b\u1ec1 m\u1eb7t<\/td>Ki\u1ec3m tra xem v\u1eadt li\u1ec7u l\u1ecdc c\u00f3 b\u1ecb v\u00f3n c\u1ee5c, c\u1ea7n v\u1ec7 sinh ho\u1eb7c thay th\u1ebf kh\u00f4ng, c\u00f3 c\u1ea7n thi\u1ebft kh\u00f4ng.<\/td><\/tr>
    M\u00f4i tr\u01b0\u1eddng<\/strong><\/td>\u0110\u1ed9 \u1ea9m cao, t\u00edch t\u1ee5 t\u0129nh \u0111i\u1ec7n, thi\u1ebfu kh\u00ed tr\u01a1.<\/td>Theo d\u00f5i \u0111\u1ed9 \u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i trong x\u01b0\u1edfng, \u0111i\u1ec7n tr\u1edf n\u1ed1i \u0111\u1ea5t c\u1ee7a thi\u1ebft b\u1ecb, v\u00e0 vi\u1ec7c c\u00f3 s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 b\u1eb1ng kh\u00ed tr\u01a1 hay kh\u00f4ng (theo Vi\u1ec7n Nghi\u00ean c\u1ee9u Khoa h\u1ecdc).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    B\u01b0\u1edbc 4: Tri\u1ec3n khai c\u00e1c gi\u1ea3i ph\u00e1p t\u1eeb \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ebfn ph\u1ee9c t\u1ea1p nh\u1ea5t<\/mark><\/h2>\n\n\n\n

    \u01afu ti\u00ean c\u00e1c h\u00e0nh \u0111\u1ed9ng d\u1ef1a tr\u00ean chi ph\u00ed, hi\u1ec7u qu\u1ea3 v\u00e0 t\u00ednh kh\u1ea3 thi. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 chi\u1ebfn l\u01b0\u1ee3c theo t\u1eebng c\u1ea5p \u0111\u1ed9:<\/p>\n\n\n\n

    C\u00e1c bi\u1ec7n ph\u00e1p can thi\u1ec7p nhanh ch\u00f3ng<\/mark><\/h3>\n\n\n\n

    N\u1ebfu \u0111\u1ed9 \u1ea9m >0,2%, h\u00e3y l\u00e0m kh\u00f4 nguy\u00ean li\u1ec7u ngay l\u1eadp t\u1ee9c.<\/p>\n\n\n\n

    Th\u00eam c\u00e1c ch\u1ea5t tr\u1ee3 gi\u00fap vi l\u01b0\u1ee3ng (v\u00ed d\u1ee5: silica hun kh\u00f3i k\u1ef5 n\u01b0\u1edbc 0,2% ho\u1eb7c stearat).<\/p>\n\n\n\n

    Gi\u1ea3m t\u1ed1c \u0111\u1ed9 c\u1ea5p li\u1ec7u \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 nhi\u1ec7t c\u1ee5c b\u1ed9.<\/p>\n\n\n\n

    Ki\u1ec3m tra v\u00e0 \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch \u0111\u1ec3 tri\u1ec7t ti\u00eau t\u0129nh \u0111i\u1ec7n.<\/p>\n\n\n\n

    T\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh<\/mark><\/h3>\n\n\n\n

    \u0110i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 quay v\u00e0 t\u1ef7 l\u1ec7 \u0111\u1ed5 \u0111\u1ea7y \u0111\u1ec3 t\u00ecm ra ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng \u201chi\u1ec7u qu\u1ea3 nh\u01b0ng kh\u00f4ng qu\u00e1 n\u00f3ng\u201d.<\/p>\n\n\n\n

    \u00c1p d\u1ee5ng ch\u1ebf \u0111\u1ed9 v\u1eadn h\u00e0nh gi\u00e1n \u0111o\u1ea1n v\u1edbi h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t b\u1eb1ng kh\u00f4ng kh\u00ed\/n\u01b0\u1edbc \u0111\u1ec3 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 bu\u1ed3ng \u1edf m\u1ee9c cao. < (Nhi\u1ec7t \u0111\u1ed9 chuy\u1ec3n pha th\u1ee7y tinh Tg c\u1ee7a v\u1eadt li\u1ec7u \u2013 20\u00b0C)<\/strong>.<\/p>\n\n\n\n

    Chuy\u1ec3n sang m\u00f4i tr\u01b0\u1eddng kh\u00ed tr\u01a1 (v\u00ed d\u1ee5: N\u2082) \u0111\u1ec3 ng\u0103n ch\u1eb7n qu\u00e1 tr\u00ecnh oxy h\u00f3a, lo\u1ea1i b\u1ecf h\u01a1i \u1ea9m v\u00e0 x\u1ea3 t\u0129nh \u0111i\u1ec7n.<\/p>\n\n\n\n

    N\u00e2ng c\u1ea5p thi\u1ebft b\u1ecb v\u00e0 c\u00f4ng th\u1ee9c<\/mark><\/h3>\n\n\n\n

    Thay th\u1ebf l\u1edbp l\u00f3t b\u00ean trong b\u1eb1ng c\u00e1c l\u1edbp ph\u1ee7 ch\u1ed1ng m\u00e0i m\u00f2n b\u1eb1ng PTFE, zirconia ho\u1eb7c polymer.<\/p>\n\n\n\n

    L\u1eafp \u0111\u1eb7t c\u00e1c thi\u1ebft b\u1ecb khu\u1ea5y c\u1ea1o th\u00e0nh (v\u00ed d\u1ee5: r\u00f4to ki\u1ec3u neo v\u1edbi c\u00e1nh qu\u1ea1t linh ho\u1ea1t).<\/p>\n\n\n\n

    T\u00edch h\u1ee3p th\u1ed5i ng\u01b0\u1ee3c xung ho\u1eb7c th\u1ed5i kh\u00ed t\u1eeb \u0111\u00e1y \u0111\u1ec3 ch\u1ee7 \u0111\u1ed9ng lo\u1ea1i b\u1ecf c\u1eb7n b\u00e1m tr\u00ean th\u00e0nh t\u01b0\u1eddng.<\/p>\n\n\n\n

    Ph\u00e1t tri\u1ec3n c\u00e1c c\u00f4ng th\u1ee9c ch\u1ea5t tr\u1ee3 m\u00e0i chuy\u00ean d\u1ee5ng (v\u00ed d\u1ee5: ch\u1ee9a c\u00e1c ch\u1ea5t ch\u1ed1ng d\u00ednh g\u1ed1c silicon).<\/p>\n\n\n\n

    Thi\u1ebft k\u1ebf l\u1ea1i quy tr\u00ecnh<\/mark><\/h3>\n\n\n\n

    \u0110\u00e1nh gi\u00e1 t\u00ednh kh\u1ea3 thi c\u1ee7a qu\u00e1 tr\u00ecnh nghi\u1ec1n \u01b0\u1edbt. N\u1ebfu ph\u00f9 h\u1ee3p, ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n \u01b0\u1edbt k\u1ebft h\u1ee3p s\u1ea5y phun c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m chi ph\u00ed h\u01a1n.<\/p>\n\n\n\n

    Tr\u01b0\u1edbc khi nghi\u1ec1n, c\u1ea7n t\u1ea1o vi\u00ean nh\u1ecf \u0111\u1ec3 t\u1ea1o th\u00e0nh b\u1ed9t m\u1ecbn th\u00e0nh c\u00e1c vi c\u1ea7u, gi\u00fap gi\u1ea3m \u0111\u1ed9 d\u00ednh ban \u0111\u1ea7u.<\/p>\n\n\n\n

    B\u01b0\u1edbc 5: X\u00e1c minh v\u00e0 l\u1eb7p l\u1ea1i<\/mark><\/h2>\n\n\n\n

    Vi\u1ec7c ki\u1ec3m tra x\u00e1c th\u1ef1c v\u00f2ng k\u00edn l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft sau b\u1ea5t k\u1ef3 \u0111i\u1ec1u ch\u1ec9nh n\u00e0o.<\/strong><\/p>\n\n\n\n

    C\u00e1c ch\u1ec9 s\u1ed1 ng\u1eafn h\u1ea1n:<\/strong> Hi\u1ec7n t\u01b0\u1ee3ng t\u00edch t\u1ee5 c\u1eb7n c\u00f3 gi\u1ea3m kh\u00f4ng? Qu\u00e1 tr\u00ecnh x\u1ea3 c\u00f3 di\u1ec5n ra su\u00f4n s\u1ebb kh\u00f4ng? D\u00f2ng \u0111i\u1ec7n c\u00f3 \u1ed5n \u0111\u1ecbnh kh\u00f4ng?<\/p>\n\n\n\n

    C\u00e1c ch\u1ec9 s\u1ed1 gi\u1eefa k\u1ef3:<\/strong> S\u1ea3n ph\u1ea9m c\u00f3 \u0111\u1ea1t D50, di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang v\u00e0 kh\u1ea3 n\u0103ng ch\u1ea3y (t\u1ef7 l\u1ec7 Hausner) nh\u01b0 mong mu\u1ed1n kh\u00f4ng?<\/p>\n\n\n\n

    C\u00e1c ch\u1ec9 s\u1ed1 d\u00e0i h\u1ea1n:<\/strong> Chu k\u1ef3 b\u1ea3o tr\u00ec thi\u1ebft b\u1ecb c\u00f3 \u0111\u01b0\u1ee3c k\u00e9o d\u00e0i h\u01a1n kh\u00f4ng? \u0110\u1ed9 \u0111\u1ed3ng nh\u1ea5t c\u1ee7a l\u00f4 s\u1ea3n ph\u1ea9m c\u00f3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n kh\u00f4ng?<\/p>\n\n\n\n

    Ch\u00fang t\u00f4i khuy\u00ean b\u1ea1n n\u00ean gi\u1eef m\u1ed9t nh\u1eadt k\u00fd qu\u00e1 tr\u00ecnh nghi\u1ec1n<\/strong> Ghi l\u1ea1i \u0111\u1ed9 \u1ea9m c\u1ee7a nguy\u00ean li\u1ec7u \u0111\u1ea7u v\u00e0o, nhi\u1ec7t \u0111\u1ed9\/\u0111\u1ed9 \u1ea9m m\u00f4i tr\u01b0\u1eddng xung quanh, d\u00f2ng \u0111i\u1ec7n \u0111\u1ed9ng c\u01a1 ch\u00ednh, nhi\u1ec7t \u0111\u1ed9 \u0111\u1ea7u ra, lo\u1ea1i\/li\u1ec1u l\u01b0\u1ee3ng ch\u1ea5t h\u1ed7 tr\u1ee3 v\u00e0 \u0111i\u1ec3m t\u00edch t\u1ee5 \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a d\u1ef1a tr\u00ean d\u1eef li\u1ec7u.<\/p>\n\n\n\n

    Ph\u1ea7n k\u1ebft lu\u1eadn<\/mark><\/h2>\n\n\n\n

    Trong k\u1ef9 thu\u1eadt b\u1ed9t, hi\u1ec7n t\u01b0\u1ee3ng b\u00e1m d\u00ednh v\u00e0o th\u00e0nh th\u01b0\u1eddng bi\u1ec3u hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng s\u1ef1 thay \u0111\u1ed5i m\u1ea1nh m\u1ebd v\u1ec1 c\u00e1c t\u00ednh ch\u1ea5t l\u00fd h\u00f3a c\u1ee7a v\u1eadt li\u1ec7u khi b\u1ecb \u0111\u1ea9y \u0111\u1ebfn gi\u1edbi h\u1ea1n nghi\u1ec1n. \u0110i\u1ec1u n\u00e0y b\u00e1o hi\u1ec7u r\u1eb1ng v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 \u0111ang ti\u1ebfn g\u1ea7n \u0111\u1ebfn gi\u1edbi h\u1ea1n x\u1eed l\u00fd k\u1ef9 thu\u1eadt c\u1ee7a n\u00f3. <\/p>\n\n\n\n

    Th\u00e1ch th\u1ee9c n\u00e0y th\u00fac \u0111\u1ea9y ch\u00fang ta ph\u1ea3i \u0111\u00e1nh gi\u00e1 l\u1ea1i c\u00e1c y\u00eau c\u1ea7u thi\u1ebft k\u1ebf s\u1ea3n ph\u1ea9m (v\u00ed d\u1ee5: D97 < 5\u03bcm c\u00f3 th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft kh\u00f4ng?) ho\u1eb7c xem x\u00e9t thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i b\u1ec1 m\u1eb7t c\u1ee7a b\u1ed9t (th\u00f4ng qua ph\u1ee7 ho\u1eb7c bi\u1ebfn \u0111\u1ed5i) thay v\u00ec ch\u1ec9 t\u1eadp trung theo \u0111u\u1ed5i k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ecbn h\u01a1n.<\/p>\n\n\n\n

    B\u1ed9t s\u1eed thi<\/mark><\/h2>\n\n\n\n

    B\u1ed9t s\u1eed thi<\/a> C\u00f4ng ty ch\u00fang t\u00f4i chuy\u00ean v\u1ec1 c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn b\u1ed9t m\u1ecbn cho ng\u00e0nh kho\u00e1ng s\u1ea3n, h\u00f3a ch\u1ea5t, th\u1ef1c ph\u1ea9m, d\u01b0\u1ee3c ph\u1ea9m, v.v. \u0110\u1ed9i ng\u0169 c\u1ee7a ch\u00fang t\u00f4i c\u00f3 h\u01a1n 20 n\u0103m kinh nghi\u1ec7m trong ch\u1ebf bi\u1ebfn c\u00e1c lo\u1ea1i b\u1ed9t kh\u00e1c nhau. Ch\u00fang t\u00f4i l\u00e0 nh\u00e0 cung c\u1ea5p chuy\u00ean nghi\u1ec7p c\u00e1c d\u1ef1 \u00e1n ch\u1ebf bi\u1ebfn b\u1ed9t, \u0111\u1eb7c bi\u1ec7t l\u00e0 nghi\u1ec1n b\u1ed9t, ph\u00e2n lo\u1ea1i b\u1ed9t, ph\u00e2n t\u00e1n b\u1ed9t, x\u1eed l\u00fd b\u1ec1 m\u1eb7t b\u1ed9t v\u00e0 t\u00e1i ch\u1ebf ch\u1ea5t th\u1ea3i. Ch\u00fang t\u00f4i cung c\u1ea5p d\u1ecbch v\u1ee5 t\u01b0 v\u1ea5n, th\u1eed nghi\u1ec7m, thi\u1ebft k\u1ebf d\u1ef1 \u00e1n, m\u00e1y m\u00f3c, v\u1eadn h\u00e0nh th\u1eed v\u00e0 \u0111\u00e0o t\u1ea1o.<\/p>\n\n\n\n

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