{"id":113786,"date":"2021-11-12T16:16:17","date_gmt":"2021-11-12T08:16:17","guid":{"rendered":"https:\/\/www.alpapowder.com\/113786\/"},"modified":"2021-11-12T16:16:17","modified_gmt":"2021-11-12T08:16:17","slug":"tinh-nang-va-ung-dung-cua-vi-hat-silicon","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/113786\/","title":{"rendered":"T\u00ednh n\u0103ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a vi h\u1ea1t silicon"},"content":{"rendered":"

B\u1ed9t vi silic \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u1ea1ch anh t\u1ef1 nhi\u00ean (SiO2<\/sub>) ho\u1eb7c th\u1ea1ch anh nung ch\u1ea3y (SiO2 <\/sub>v\u00f4 \u0111\u1ecbnh h\u00ecnh sau khi nung ch\u1ea3y \u1edf nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 l\u00e0m ngu\u1ed9i th\u1ea1ch anh t\u1ef1 nhi\u00ean) sau khi nghi\u1ec1n, nghi\u1ec1n bi (ho\u1eb7c rung, phay tia), tuy\u1ec3n n\u1ed5i, t\u1ea9y r\u1eeda, x\u1eed l\u00fd n\u01b0\u1edbc c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao, vv. B\u1ed9t vi x\u1eed l\u00fd b\u1eb1ng c\u00f4ng ngh\u1ec7 n\u00e0y. B\u1ed9t silica<\/a> l\u00e0 v\u1eadt li\u1ec7u phi kim lo\u1ea1i v\u00f4 c\u01a1 kh\u00f4ng \u0111\u1ed9c, kh\u00f4ng m\u00f9i, kh\u00f4ng g\u00e2y \u00f4 nhi\u1ec5m.<\/p>\n

\"\"<\/p>\n

C\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc<\/h4>\n

1. B\u1ec1 ngo\u00e0i c\u1ee7a b\u1ed9t silica<\/a> l\u00e0 b\u1ed9t m\u00e0u x\u00e1m ho\u1eb7c tr\u1eafng nh\u1ea1t, v\u00e0 \u0111\u1ed9 kh\u00fac x\u1ea1 c\u1ee7a n\u00f3 l\u00e0> 1600 \u00b0 C. M\u1eadt \u0111\u1ed9 kh\u1ed1i: 200 \uff5e 250 kg \/ m3<\/sup>.<\/p>\n

2. \u0110\u1ed9 m\u1ecbn c\u1ee7a silica<\/a> fume: h\u01a1n 80% silica fume c\u00f3 \u0111\u1ed9 m\u1ecbn nh\u1ecf h\u01a1n 1 micron, k\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh l\u00e0 0,1-0,3 micron v\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u00e0 20-28m2<\/sup>\/ g. \u0110\u1ed9 m\u1ecbn v\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang c\u1ee7a n\u00f3 kho\u1ea3ng 80-100 l\u1ea7n so v\u1edbi xi m\u0103ng v\u00e0 50-70 l\u1ea7n so v\u1edbi tro bay. Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn cho b\u1ed9t th\u1ea1ch anh l\u00e0 400 mesh, 800 mesh, 1000 mesh, 1500 mesh v\u00e0 2000 mesh.<\/p>\n

3. H\u00ecnh th\u00e1i h\u1ea1t v\u00e0 c\u1ea5u tr\u00fac pha kho\u00e1ng: Trong qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh silica<\/a> fume, do t\u00e1c d\u1ee5ng c\u1ee7a s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t trong qu\u00e1 tr\u00ecnh chuy\u1ec3n pha h\u00ecnh th\u00e0nh c\u00e1c h\u1ea1t h\u00ecnh c\u1ea7u v\u00f4 \u0111\u1ecbnh h\u00ecnh, b\u1ec1 m\u1eb7t t\u01b0\u01a1ng \u0111\u1ed1i nh\u1eb5n, m\u1ed9t s\u1ed1 c\u00f3 nhi\u1ec1u v\u00f2ng tr\u00f2n. . M\u1ed9t t\u1eadp h\u1ee3p c\u00e1c h\u1ea1t h\u00ecnh c\u1ea7u d\u00ednh v\u00e0o nhau. N\u00f3 l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u tro n\u00fai l\u1eeda c\u00f3 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u1edbn v\u00e0 ho\u1ea1t \u0111\u1ed9ng cao. \u0110\u1ed1i v\u1edbi v\u1eadt li\u1ec7u tr\u1ed9n v\u1edbi kh\u00f3i silica<\/a>, nh\u1eefng qu\u1ea3 c\u1ea7u nh\u1ecf c\u00f3 th\u1ec3 \u0111\u00f3ng vai tr\u00f2 b\u00f4i tr\u01a1n.<\/p>\n

B\u1ed9t silica<\/a> c\u00f3 th\u1ec3 l\u1ea5p \u0111\u1ea7y c\u00e1c l\u1ed7 r\u1ed7ng gi\u1eefa c\u00e1c h\u1ea1t xi m\u0103ng, \u0111\u1ed3ng th\u1eddi t\u1ea1o gel v\u1edbi s\u1ea3n ph\u1ea9m hydrat h\u00f3a, v\u00e0 ph\u1ea3n \u1ee9ng v\u1edbi v\u1eadt li\u1ec7u ki\u1ec1m magie oxit \u0111\u1ec3 t\u1ea1o th\u00e0nh gel. Trong b\u00ea t\u00f4ng g\u1ed1c xi m\u0103ng, v\u1eefa v\u00e0 v\u1eadt li\u1ec7u \u0111\u00fac ch\u1ecbu l\u1eeda, tr\u1ed9n m\u1ed9t l\u01b0\u1ee3ng silica<\/a> fume th\u00edch h\u1ee3p c\u00f3 th\u1ec3 \u0111\u00f3ng vai tr\u00f2 sau:<\/p>\n

1. C\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 c\u00e1c \u0111\u1eb7c t\u00ednh n\u00e9n, u\u1ed1n, kh\u00f4ng th\u1ea5m n\u01b0\u1edbc, ch\u1ed1ng \u0103n m\u00f2n, va \u0111\u1eadp v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n.<\/p>\n

2. N\u00f3 c\u00f3 ch\u1ee9c n\u0103ng gi\u1eef n\u01b0\u1edbc, ng\u0103n ng\u1eeba s\u1ef1 ph\u00e2n t\u00e1ch v\u00e0 ch\u1ea3y m\u00e1u, v\u00e0 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 l\u1ef1c c\u1ea3n c\u1ee7a b\u01a1m b\u00ea t\u00f4ng.<\/p>\n

3. K\u00e9o d\u00e0i \u0111\u00e1ng k\u1ec3 tu\u1ed5i th\u1ecd c\u1ee7a b\u00ea t\u00f4ng. \u0110\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t nh\u01b0 x\u00f3i m\u00f2n \u00f4 nhi\u1ec5m clorua, x\u00f3i m\u00f2n sunfat, \u0111\u1ed9 \u1ea9m cao th\u00ec \u0111\u1ed9 b\u1ec1n c\u1ee7a b\u00ea t\u00f4ng c\u00f3 th\u1ec3 t\u0103ng l\u00ean g\u1ea5p \u0111\u00f4i, th\u1eadm ch\u00ed g\u1ea5p v\u00e0i l\u1ea7n.<\/p>\n

4. Gi\u1ea3m \u0111\u00e1ng k\u1ec3 tro s\u00e0n c\u1ee7a b\u00ea t\u00f4ng phun v\u00e0 b\u00ea t\u00f4ng \u0111\u00fac, \u0111\u1ed3ng th\u1eddi t\u0103ng \u0111\u1ed9 d\u00e0y c\u1ee7a m\u1ed9t l\u1edbp \u0111\u01b0\u1ee3c phun duy nh\u1ea5t.<\/p>\n

5. N\u00f3 l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n c\u1ea7n thi\u1ebft c\u1ee7a b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao, v\u00e0 b\u00ea t\u00f4ng C150 \u0111\u00e3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong k\u1ef9 thu\u1eadt.<\/p>\n

6. N\u00f3 c\u00f3 t\u00e1c d\u1ee5ng g\u1ea5p kho\u1ea3ng 5 l\u1ea7n xi m\u0103ng. N\u00f3 c\u00f3 th\u1ec3 gi\u1ea3m chi ph\u00ed v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong b\u00ea t\u00f4ng th\u01b0\u1eddng v\u00e0 \u0111\u00fac xi m\u0103ng th\u1ea5p.<\/p>\n

7. Ng\u0103n ch\u1eb7n hi\u1ec7u qu\u1ea3 s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a ph\u1ea3n \u1ee9ng ki\u1ec1m h\u00f3a c\u1ed1t li\u1ec7u b\u00ea t\u00f4ng.<\/p>\n

8. C\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u1eb7t c\u1ee7a v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda \u0111\u00fac. Khi c\u00f9ng t\u1ed3n t\u1ea1i v\u1edbi Al2<\/sub>O3<\/sub>, d\u1ec5 t\u1ea1o th\u00e0nh pha mullit, l\u00e0m t\u0103ng \u0111\u1ed9 b\u1ec1n nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng s\u1ed1c nhi\u1ec7t.<\/p>\n

L\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng<\/h4>\n

1. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong v\u1eefa v\u00e0 b\u00ea t\u00f4ng: nh\u00e0 cao t\u1ea7ng, c\u1ea3ng bi\u1ec3n, h\u1ed3 ch\u1ee9a v\u00e0 \u0111\u1eadp, th\u1ee7y l\u1ee3i, c\u1eeda c\u1ed1ng, \u0111\u01b0\u1eddng s\u1eaft, \u0111\u01b0\u1eddng cao t\u1ed1c, c\u1ea7u, t\u00e0u \u0111i\u1ec7n ng\u1ea7m, \u0111\u01b0\u1eddng h\u1ea7m, \u0111\u01b0\u1eddng b\u0103ng s\u00e2n bay, m\u1eb7t \u0111\u01b0\u1eddng b\u00ea t\u00f4ng v\u00e0 \u0111\u01b0\u1eddng h\u1ea7m m\u1ecf than, v.v.<\/p>\n

2. Trong c\u00f4ng nghi\u1ec7p v\u1eadt li\u1ec7u:<\/p>\n

(1) C\u00e1c ph\u00f4i v\u00e0 ph\u00f4i ch\u1ecbu l\u1eeda xi m\u0103ng th\u1ea5p, hi\u1ec7u su\u1ea5t cao, c\u00f3 tu\u1ed5i th\u1ecd cao g\u1ea5p ba l\u1ea7n so v\u1edbi c\u00e1c lo\u1ea1i \u0111\u00fac th\u00f4ng th\u01b0\u1eddng. \u0110\u1ed9 kh\u00fac x\u1ea1 \u0111\u01b0\u1ee3c t\u0103ng l\u00ean kho\u1ea3ng 100 \u00b0 C, v\u00e0 \u0111\u1ed9 b\u1ec1n nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng s\u1ed1c nhi\u1ec7t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3. \u0110\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong: l\u00f2 luy\u1ec7n c\u1ed1c, luy\u1ec7n gang, luy\u1ec7n th\u00e9p, luy\u1ec7n c\u00e1n th\u00e9p, kim lo\u1ea1i m\u00e0u, th\u1ee7y tinh, g\u1ed1m s\u1ee9 v\u00e0 c\u00e1c ng\u00e0nh s\u1ea3n xu\u1ea5t \u0111i\u1ec7n.<\/p>\n

(2) R\u00e3nh s\u1eaft l\u1edbn v\u00e0 v\u1eadt li\u1ec7u g\u1ea7u m\u00fac, g\u1ea1ch th\u1ea5m kh\u00ed, v\u1eadt li\u1ec7u s\u1eeda ch\u1eefa c\u00f3 v\u1ebft b\u1ea9n, v.v.<\/p>\n

(3) \u1ee8ng d\u1ee5ng thi c\u00f4ng v\u1eadt li\u1ec7u \u0111\u00fac ch\u1ecbu l\u1eeda t\u1ef1 ch\u1ea3y v\u00e0 phun \u01b0\u1edbt kh\u00f4.<\/p>\n

(4) C\u00e1c s\u1ea3n ph\u1ea9m silic cacbua li\u00ean k\u1ebft v\u1edbi oxit (\u0111\u1ed3 \u0111\u1ea1c trong l\u00f2 g\u1ed1m, m\u00e0n ch\u1eafn l\u1eeda, v.v.).<\/p>\n

(5) V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t nh\u1eb9 canxi silicat lo\u1ea1i nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n

(6) \u0110\u0129a \u0111\u1ea9y mullite corundum \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho l\u00f2 s\u1ee9 \u0111i\u1ec7n.<\/p>\n

(7) V\u1eadt li\u1ec7u v\u00e0 s\u1ea3n ph\u1ea9m ch\u1ecbu m\u00e0i m\u00f2n \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n

(8) Corundum v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m g\u1ed1m s\u1ee9.<\/p>\n

(9) S\u1ea3n ph\u1ea9m k\u1ebft h\u1ee3p Sialon.<\/p>\n

Hi\u1ec7n nay, ngo\u00e0i vi\u1ec7c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda \u0111\u00fac, n\u00f3 c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda nung ch\u1ea3y v\u00e0 nung k\u1ebft.<\/p>\n

3. V\u1eadt li\u1ec7u \u1ed1p t\u01b0\u1eddng v\u00e0 v\u1eadt li\u1ec7u \u1ed1p t\u01b0\u1eddng m\u1edbi:<\/p>\n

(1) V\u1eefa polyme, v\u1eefa c\u00e1ch nhi\u1ec7t v\u00e0 ch\u1ea5t t\u1ea1o b\u1ec1 m\u1eb7t \u0111\u1ec3 c\u00e1ch nhi\u1ec7t t\u01b0\u1eddng.<\/p>\n

(2) V\u1eadt li\u1ec7u ch\u1ed1ng th\u1ea5m polyme g\u1ed1c xi m\u0103ng.<\/p>\n

(3) V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t c\u1ed1t li\u1ec7u nh\u1eb9, b\u00ea t\u00f4ng v\u00e0 s\u1ea3n ph\u1ea9m ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

(4) B\u1ed9t tr\u00e9t gia c\u00f4ng x\u00e2y t\u01b0\u1eddng n\u1ed9i ngo\u1ea1i th\u1ea5t.<\/p>\n

4. C\u00e1c m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng kh\u00e1c:<\/p>\n

(1) Nguy\u00ean li\u1ec7u c\u1ee7a g\u1ea1ch silicat.<\/p>\n

(2) S\u1ea3n xu\u1ea5t th\u1ee7y tinh.<\/p>\n

(3) D\u00f9ng l\u00e0m v\u1eadt li\u1ec7u c\u1ee7ng c\u1ed1 c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1. V\u00ec th\u00e0nh ph\u1ea7n c\u1ee7a n\u00f3 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 mu\u1ed9i than tr\u1eafng \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p pha kh\u00ed. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t v\u1eadt li\u1ec7u l\u1ea5p \u0111\u1ea7y v\u00e0 gia c\u1ed1 trong c\u00e1c v\u1eadt li\u1ec7u polyme nh\u01b0 cao su, nh\u1ef1a th\u00f4ng, s\u01a1n, s\u01a1n, polyester kh\u00f4ng b\u00e3o h\u00f2a, v.v.<\/p>\n

(4) \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t ch\u1ed1ng \u0111\u00f3ng c\u1ee5c trong ng\u00e0nh ph\u00e2n b\u00f3n.<\/p>\n

 <\/p>\n

Ngu\u1ed3n b\u00e0i vi\u1ebft: China Powder Network<\/p>\n","protected":false},"excerpt":{"rendered":"

B\u1ed9t vi silic \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u1ea1ch anh t\u1ef1 nhi\u00ean (SiO2) ho\u1eb7c th\u1ea1ch anh nung ch\u1ea3y (SiO2 v\u00f4 \u0111\u1ecbnh h\u00ecnh sau khi nung ch\u1ea3y \u1edf nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 l\u00e0m ngu\u1ed9i th\u1ea1ch anh t\u1ef1 nhi\u00ean) sau khi nghi\u1ec1n, nghi\u1ec1n bi (ho\u1eb7c rung, phay tia), tuy\u1ec3n n\u1ed5i, t\u1ea9y r\u1eeda, x\u1eed l\u00fd n\u01b0\u1edbc c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao, vv.<\/p>\n","protected":false},"author":6,"featured_media":110858,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[830],"tags":[1123,1125,1127,1124,1126],"class_list":["post-113786","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","tag-bot-silicon","tag-dac-diem-cua-bot-silica","tag-silica-vi","tag-thach-anh","tag-ung-dung-bot-silicon"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/113786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=113786"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/113786\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/110858"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=113786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=113786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=113786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}