![\"\"](\"https:\/\/www.alpapowder.com\/wp-content\/uploads\/2024\/05\/High-thermal-conductivity-filler.jpg\")
<\/p>\n<\/p>\n
Hi\u1ec7n nay, h\u1ea7u h\u1ebft c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 v\u1eadt li\u1ec7u t\u1ed5ng h\u1ee3p polymer d\u1eabn nhi\u1ec7t \u0111\u1ec1u t\u1eadp trung v\u00e0o nghi\u00ean c\u1ee9u ch\u1ea5t \u0111\u1ed9n c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t cao. \u0110i\u1ec1u n\u00e0y l\u00e0 do vi\u1ec7c c\u1ea3i thi\u1ec7n t\u00ednh d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite ch\u1ee7 y\u1ebfu d\u1ef1a v\u00e0o vai tr\u00f2 c\u1ee7a ch\u1ea5t \u0111\u1ed9n d\u1eabn nhi\u1ec7t. Vi\u1ec7c l\u1ef1a ch\u1ecdn ch\u1ea5t \u0111\u1ed9n l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi t\u00ednh d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u composite, v\u00ec v\u1eady nhi\u1ec1u nh\u00e0 nghi\u00ean c\u1ee9u cam k\u1ebft ph\u00e1t tri\u1ec3n c\u00e1c ch\u1ea5t \u0111\u1ed9n m\u1edbi c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t cao.<\/p>\n
M\u1eb7c d\u00f9 c\u00e1c h\u1ea1t kim lo\u1ea1i v\u00e0 v\u1eadt li\u1ec7u cacbon (nh\u01b0 graphene, \u1ed1ng nano cacbon \u0111\u01a1n v\u00e1ch\/\u0111a v\u00e1ch, v.v.) c\u00f3 \u0111\u1ed9 d\u1eabn nhi\u1ec7t n\u1ed9i t\u1ea1i cao v\u00e0 c\u00f3 l\u1ee3i cho vi\u1ec7c c\u1ea3i thi\u1ec7n t\u00ednh d\u1eabn nhi\u1ec7t c\u1ee7a polyme, nh\u01b0ng c\u00e1c ch\u1ea5t \u0111\u1ed9n n\u00e0y th\u01b0\u1eddng thay \u0111\u1ed5i \u0111\u1ed9 d\u1eabn nhi\u1ec7t \u0111\u1ed3ng th\u1eddi thay \u0111\u1ed5i t\u00ednh ch\u1ea5t d\u1eabn nhi\u1ec7t. N\u00f3 c\u0169ng l\u00e0m thay \u0111\u1ed5i t\u00ednh ch\u1ea5t c\u00e1ch \u0111i\u1ec7n c\u1ee7a polymer, d\u1eabn \u0111\u1ebfn \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n c\u1ef1c cao v\u00e0 h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i cao, kh\u00f4ng th\u1ec3 \u00e1p d\u1ee5ng cho v\u1eadt li\u1ec7u composite g\u1ed1c polymer c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t cao v\u00e0 \u0111\u1eb7c t\u00ednh c\u00e1ch nhi\u1ec7t tuy\u1ec7t v\u1eddi. V\u00ec v\u1eady, l\u0129nh v\u1ef1c c\u00e1ch nhi\u1ec7t \u0111ang ch\u00fa \u00fd nhi\u1ec1u h\u01a1n \u0111\u1ebfn ch\u1ea5t \u0111\u1ed9n g\u1ed1m c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t n\u1ed9i t\u1ea1i c\u1ef1c cao v\u00e0 \u0111\u1eb7c t\u00ednh c\u00e1ch nhi\u1ec7t t\u1ed1t. Cho \u0111\u1ebfn nay, ch\u1ea5t \u0111\u1ed9n g\u1ed1m bao g\u1ed3m alumina, nh\u00f4m nitrit, boron nitrit, magie oxit, cacbua silic, v.v. Trong s\u1ed1 \u0111\u00f3, alumina, nh\u00f4m nitrit v\u00e0 boron nitrit hi\u1ec7n l\u00e0 nh\u1eefng ch\u1ea5t \u0111\u1ed9n g\u1ed1m ch\u00ednh.<\/p>\n
nh\u00f4m<\/p>\n
Alumina th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ecdn l\u00e0m ch\u1ea5t \u0111\u1ed9n do chi ph\u00ed th\u1ea5p h\u01a1n v\u00e0 \u0111i\u1ec7n tr\u1edf su\u1ea5t cao h\u01a1n. M\u1eb7c d\u00f9 \u0111\u1ed9 d\u1eabn nhi\u1ec7t n\u1ed9i t\u1ea1i c\u1ee7a n\u00f3 th\u1ea5p h\u01a1n c\u00e1c h\u1ea1t kh\u00e1c nh\u01b0ng n\u00f3 v\u1eabn \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u00e0 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i. Trong s\u1ed1 \u0111\u00f3, alumina h\u00ecnh c\u1ea7u \u0111\u00e3 tr\u1edf th\u00e0nh ch\u1ea5t \u0111\u1ed9n g\u1ed1m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t do hi\u1ec7u su\u1ea5t chi ph\u00ed c\u1ef1c cao. C\u1ea7n ch\u1ec9 ra r\u1eb1ng, n\u00f3i chung, \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 d\u1eabn nhi\u1ec7t cao h\u01a1n, l\u01b0\u1ee3ng alumina b\u1ed5 sung s\u1ebd cao h\u01a1n v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ea3i thi\u1ec7n b\u1ecb h\u1ea1n ch\u1ebf.<\/p>\n
Nh\u00f4m nitrat (AlN)<\/p>\n
So v\u1edbi c\u00e1c ch\u1ea5t \u0111\u1ed9n c\u00e1ch nhi\u1ec7t d\u1eabn nhi\u1ec7t kh\u00e1c, h\u1ea1t nh\u00f4m nitrit c\u00f3 \u0111\u1ed9 d\u1eabn nhi\u1ec7t cao (\u0111\u1ed9 d\u1eabn nhi\u1ec7t l\u00fd thuy\u1ebft l\u00e0 320W\u00b7m-1 K-1), \u0111i\u1ec7n tr\u1edf su\u1ea5t cao (\u0111i\u1ec7n tr\u1edf su\u1ea5t l\u1edbn h\u01a1n 1014\u03a9m), h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i th\u1ea5p v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u r\u1ed9ng r\u00e3i do m\u1ed9t lo\u1ea1t c\u00e1c \u0111\u1eb7c t\u00ednh tuy\u1ec7t v\u1eddi nh\u01b0 t\u1ed5n th\u1ea5t \u0111i\u1ec7n m\u00f4i, h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t th\u1ea5p (4,4 \u00d7 10-6K-1, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 silicon<\/a>) v\u00e0 kh\u00f4ng \u0111\u1ed9c h\u1ea1i, v\u00e0 \u0111\u00e3 tr\u1edf th\u00e0nh ch\u1ea5t \u0111\u1ed9n l\u00fd t\u01b0\u1edfng cho v\u1eadt li\u1ec7u composite d\u1eabn nhi\u1ec7t.<\/p>\n Nitrua boron l\u1ee5c gi\u00e1c<\/p>\n Boron nitrit l\u1ee5c gi\u00e1c hi\u1ec7n l\u00e0 ch\u1ea5t \u0111\u1ed9n g\u1ed1m ph\u1ed5 bi\u1ebfn nh\u1ea5t, ch\u1ee7 y\u1ebfu l\u00e0 do boron nitrit l\u1ee5c gi\u00e1c kh\u00f4ng ch\u1ec9 c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t cao (\u0111\u1ed9 d\u1eabn nhi\u1ec7t l\u00fd thuy\u1ebft 600 W\/m\u00b7K) m\u00e0 c\u00f2n c\u00f3 \u0111\u1eb7c t\u00ednh c\u00e1ch \u0111i\u1ec7n tuy\u1ec7t v\u1eddi. Boron nitrit l\u1ee5c gi\u00e1c (h-BN) c\u00f3 c\u1ea5u tr\u00fac l\u1ee5c gi\u00e1c \u0111a l\u1edbp t\u01b0\u01a1ng t\u1ef1 nh\u01b0 than ch\u00ec. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5u tr\u00fac c\u1ee7a n\u00f3 so v\u1edbi graphene ch\u1ee7 y\u1ebfu l\u00e0 \u1edf ch\u1ed7 c\u00e1c nguy\u00ean t\u1eed nit\u01a1 v\u00e0 nguy\u00ean t\u1eed boron \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp xen k\u1ebd nhau. C\u1ea5u tr\u00fac boron nitride h\u00ecnh l\u1ee5c gi\u00e1c n\u00e0y t\u1ea1o ra nit\u01a1. Li\u00ean k\u1ebft c\u1ed9ng h\u00f3a tr\u1ecb SP2 m\u1ea1nh m\u1ebd gi\u1eefa c\u00e1c nguy\u00ean t\u1eed v\u00e0 nguy\u00ean t\u1eed boron mang l\u1ea1i cho boron nitride kh\u1ea3 n\u0103ng d\u1eabn nhi\u1ec7t tuy\u1ec7t v\u1eddi. Ngo\u00e0i t\u00ednh d\u1eabn nhi\u1ec7t cao, boron nitride c\u00f2n c\u00f3 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t t\u1ed1t, t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc m\u1ea1nh, kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a v\u00e0 ch\u1ed1ng \u0103n m\u00f2n.<\/p>\n","protected":false},"excerpt":{"rendered":" Hi\u1ec7n nay, h\u1ea7u h\u1ebft c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 v\u1eadt li\u1ec7u composite polyme d\u1eabn nhi\u1ec7t \u0111\u1ec1u t\u1eadp trung v\u00e0o nghi\u00ean c\u1ee9u ch\u1ea5t \u0111\u1ed9n c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t cao.<\/p>\n","protected":false},"author":7,"featured_media":132048,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[428],"tags":[],"class_list":["post-132083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc-cong-ty"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/132083"}],"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\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=132083"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/132083\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/132048"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=132083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=132083"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=132083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}