{"id":699502,"date":"2024-10-31T11:26:43","date_gmt":"2024-10-31T10:26:43","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=699502"},"modified":"2024-10-31T11:26:43","modified_gmt":"2024-10-31T10:26:43","slug":"kha-nang-chiu-soc-nhiet-cua-vat-lieu","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/kha-nang-chiu-soc-nhiet-cua-vat-lieu\/","title":{"rendered":"Kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ed1c nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u"},"content":{"rendered":"<p class=\"sidekick\">Kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ed1c nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u: T\u00ecm hi\u1ec3u c\u00e1ch c\u00e1c v\u1eadt li\u1ec7u \u0111\u1ed1i ph\u00f3 v\u1edbi thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed9t ng\u1ed9t v\u00e0 \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/kha_nang_chiu_soc_nhiet_cua_vat_lieu.png\" alt=\"Kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ed1c nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Kh\u1ea3 N\u0103ng Ch\u1ecbu S\u1ed1c Nhi\u1ec7t c\u1ee7a V\u1eadt Li\u1ec7u<\/h2>\n<p>Kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ed1c nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u l\u00e0 m\u1ed9t t\u00ednh ch\u1ea5t quan tr\u1ecdng trong ng\u00e0nh nhi\u1ec7t k\u1ef9 thu\u1eadt. N\u00f3 ch\u1ec9 ra kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u ch\u1ed1ng ch\u1ecbu s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed9t ng\u1ed9t m\u00e0 kh\u00f4ng b\u1ecb h\u01b0 h\u1ecfng ho\u1eb7c gi\u1ea3m hi\u1ec7u su\u1ea5t. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p n\u01a1i m\u00e0 c\u00e1c v\u1eadt li\u1ec7u th\u01b0\u1eddng ph\u1ea3i ch\u1ecbu c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t kh\u1eafc nghi\u1ec7t.<\/p>\n<h2>S\u1ed1c Nhi\u1ec7t l\u00e0 g\u00ec?<\/h2>\n<p>S\u1ed1c nhi\u1ec7t x\u1ea3y ra khi m\u1ed9t v\u1eadt li\u1ec7u ph\u1ea3i tr\u1ea3i qua m\u1ed9t s\u1ef1 thay \u0111\u1ed5i nhanh ch\u00f3ng v\u1ec1 nhi\u1ec7t \u0111\u1ed9. V\u00ed d\u1ee5, khi m\u1ed9t v\u1eadt li\u1ec7u \u0111ang \u1edf nhi\u1ec7t \u0111\u1ed9 cao b\u1ecb l\u00e0m m\u00e1t nhanh ch\u00f3ng ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i, khi m\u1ed9t v\u1eadt li\u1ec7u \u0111ang \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p b\u1ecb nung n\u00f3ng \u0111\u1ed9t ng\u1ed9t. Nh\u1eefng thay \u0111\u1ed5i n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra \u1ee9ng su\u1ea5t nhi\u1ec7t b\u00ean trong v\u1eadt li\u1ec7u, d\u1eabn \u0111\u1ebfn n\u1ee9t v\u1ee1 ho\u1eb7c bi\u1ebfn d\u1ea1ng.<\/p>\n<h2>Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn Kh\u1ea3 N\u0103ng Ch\u1ecbu S\u1ed1c Nhi\u1ec7t<\/h2>\n<p><u1><\/p>\n<li><b>H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t:<\/b> V\u1eadt li\u1ec7u c\u00f3 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t cao s\u1ebd thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc nhi\u1ec1u h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, d\u1ec5 g\u00e2y ra \u1ee9ng su\u1ea5t nhi\u1ec7t cao h\u01a1n.<\/li>\n<li><b>\u0110\u1ed9 d\u1eabn nhi\u1ec7t:<\/b> V\u1eadt li\u1ec7u c\u00f3 \u0111\u1ed9 d\u1eabn nhi\u1ec7t cao s\u1ebd d\u1ec5 d\u00e0ng ph\u00e2n t\u00e1n nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u, gi\u1ea3m thi\u1ec3u s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a v\u1eadt li\u1ec7u.<\/li>\n<li><b>S\u1ee9c b\u1ec1n v\u00e0 \u0111\u1ed9 gi\u00f2n:<\/b> V\u1eadt li\u1ec7u c\u00f3 s\u1ee9c b\u1ec1n cao v\u00e0 \u0111\u1ed9 gi\u00f2n th\u1ea5p s\u1ebd \u00edt b\u1ecb n\u1ee9t v\u1ee1 khi ch\u1ecbu \u1ee9ng su\u1ea5t nhi\u1ec7t.<\/li>\n<p><\/u1><\/p>\n<h2>Ph\u01b0\u01a1ng Tr\u00ecnh Li\u00ean Quan<\/h2>\n<p>M\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng tr\u00ecnh c\u01a1 b\u1ea3n \u0111\u1ec3 t\u00ednh to\u00e1n \u1ee9ng su\u1ea5t nhi\u1ec7t (\u03c3) trong v\u1eadt li\u1ec7u l\u00e0:<\/p>\n<p>\n\\(<br \/>\n\u03c3 = E * \u03b1 * \u0394T<br \/>\n\\)\n<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><o1><\/p>\n<li>\u03c3: \u1ee8ng su\u1ea5t nhi\u1ec7t<\/li>\n<li>E: M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i c\u1ee7a v\u1eadt li\u1ec7u<\/li>\n<li>\u03b1: H\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u<\/li>\n<li>\u0394T: S\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9<\/li>\n<p><\/o1><\/p>\n<h2>\u1ee8ng D\u1ee5ng Th\u1ef1c Ti\u1ec5n<\/h2>\n<p>Kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ed1c nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u l\u00e0 r\u1ea5t quan tr\u1ecdng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0:<\/p>\n<p><u1><\/p>\n<li><b>C\u00f4ng nghi\u1ec7p h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5:<\/b> C\u00e1c v\u1eadt li\u1ec7u trong t\u00e0u v\u0169 tr\u1ee5 ph\u1ea3i ch\u1ecbu \u0111\u1ef1ng s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 t\u1eeb m\u00f4i tr\u01b0\u1eddng kh\u00f4ng gian l\u1ea1nh gi\u00e1 \u0111\u1ebfn s\u1ee9c n\u00f3ng khi quay tr\u1edf l\u1ea1i kh\u00ed quy\u1ec3n Tr\u00e1i \u0110\u1ea5t.<\/li>\n<li><b>C\u00f4ng nghi\u1ec7p \u00f4 t\u00f4:<\/b> C\u00e1c b\u1ed9 ph\u1eadn \u0111\u1ed9ng c\u01a1 th\u01b0\u1eddng ph\u1ea3i ch\u1ecbu s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 nhanh ch\u00f3ng khi ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li><b>C\u00f4ng nghi\u1ec7p n\u0103ng l\u01b0\u1ee3ng:<\/b> C\u00e1c \u1ed1ng d\u1eabn h\u01a1i v\u00e0 l\u00f2 ph\u1ea3n \u1ee9ng trong nh\u00e0 m\u00e1y \u0111i\u1ec7n c\u0169ng c\u1ea7n v\u1eadt li\u1ec7u v\u1edbi kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ed1c nhi\u1ec7t cao \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 hi\u1ec7u su\u1ea5t.<\/li>\n<p><\/u1><\/p>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ed1c nhi\u1ec7t l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 l\u1ef1a ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t k\u1ef9 thu\u1eadt. Hi\u1ec3u r\u00f5 v\u1ec1 t\u00ednh ch\u1ea5t n\u00e0y gi\u00fap c\u00e1c k\u1ef9 s\u01b0 v\u00e0 nh\u00e0 nghi\u00ean c\u1ee9u t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf v\u00e0 ch\u1ecdn l\u1ef1a v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p, \u0111\u1ea3m b\u1ea3o s\u1ef1 ho\u1ea1t \u0111\u1ed9ng an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kh\u1ea3 n\u0103ng ch\u1ecbu s\u1ed1c nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u: T\u00ecm hi\u1ec3u c\u00e1ch c\u00e1c v\u1eadt li\u1ec7u \u0111\u1ed1i ph\u00f3 v\u1edbi thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed9t ng\u1ed9t v\u00e0 \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the 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