{"id":679644,"date":"2024-10-23T06:31:03","date_gmt":"2024-10-23T05:31:03","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=679644"},"modified":"2024-10-23T06:31:03","modified_gmt":"2024-10-23T05:31:03","slug":"cac-dac-tinh-nhiet-cua-vat-lieu-sieu-dan-moi-la-gi","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/cac-dac-tinh-nhiet-cua-vat-lieu-sieu-dan-moi-la-gi\/","title":{"rendered":"C\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi l\u00e0 g\u00ec"},"content":{"rendered":"<p class=\"sidekick\">C\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi: c\u00e1ch ch\u00fang ho\u1ea1t \u0111\u1ed9ng, \u01b0u \u0111i\u1ec3m, v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/cac_dac_tinh_nhiet_cua_vat_lieu_sieu_dan_moi_la_gi.png\" alt=\"C\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi l\u00e0 g\u00ec\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>C\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi l\u00e0 g\u00ec?<\/h2>\n<p>V\u1eadt li\u1ec7u si\u00eau d\u1eabn l\u00e0 nh\u1eefng v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n m\u00e0 kh\u00f4ng g\u1eb7p ph\u1ea3i s\u1ef1 c\u1ea3n tr\u1edf (kh\u00e1ng \u0111i\u1ec7n) khi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u00fang gi\u1ea3m d\u01b0\u1edbi m\u1ed9t nhi\u1ec7t \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh g\u1ecdi l\u00e0 nhi\u1ec7t \u0111\u1ed9 t\u1edbi h\u1ea1n (T<sub>c<\/sub>). Nh\u1eefng v\u1eadt li\u1ec7u n\u00e0y c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 y h\u1ecdc, \u0111i\u1ec7n t\u1eed v\u00e0 n\u0103ng l\u01b0\u1ee3ng.<\/p>\n<p>C\u00e1c v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi \u0111ang \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n kh\u00f4ng ch\u1ec9 v\u00ec kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n m\u00e0 c\u00f2n v\u00ec c\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u00e1ng ch\u00fa \u00fd. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u0111\u1eb7c t\u00ednh quan tr\u1ecdng c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u n\u00e0y:<\/p>\n<ul>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9 t\u1edbi h\u1ea1n (T<sub>c<\/sub>):<\/strong> \u0110\u00e2y l\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00e0 t\u1ea1i \u0111\u00f3 v\u1eadt li\u1ec7u chuy\u1ec3n t\u1eeb tr\u1ea1ng th\u00e1i d\u1eabn \u0111i\u1ec7n b\u00ecnh th\u01b0\u1eddng sang tr\u1ea1ng th\u00e1i si\u00eau d\u1eabn. V\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi th\u01b0\u1eddng c\u00f3 T<sub>c<\/sub> cao h\u01a1n so v\u1edbi c\u00e1c v\u1eadt li\u1ec7u c\u0169, l\u00e0m cho ch\u00fang d\u1ec5 s\u1eed d\u1ee5ng h\u01a1n trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao:<\/strong> M\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi c\u00f3 kh\u1ea3 n\u0103ng ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n nhi\u1ec1u so v\u1edbi v\u1eadt li\u1ec7u si\u00eau d\u1eabn truy\u1ec1n th\u1ed1ng nh\u01b0 Nb-Ti (Niobium-Titanium) ho\u1eb7c Pb (Ch\u00ec). \u0110i\u1ec1u n\u00e0y m\u1edf ra c\u01a1 h\u1ed9i cho c\u00e1c \u1ee9ng d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng c\u1ef1c k\u1ef3 kh\u1eafc nghi\u1ec7t.<\/li>\n<li><strong>\u0110\u1ed9 d\u1eabn nhi\u1ec7t:<\/strong> V\u1eadt li\u1ec7u si\u00eau d\u1eabn th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 d\u1eabn nhi\u1ec7t th\u1ea5p \u1edf tr\u1ea1ng th\u00e1i b\u00ecnh th\u01b0\u1eddng nh\u01b0ng l\u1ea1i d\u1eabn \u0111i\u1ec7n m\u00e0 kh\u00f4ng m\u1ea5t n\u0103ng l\u01b0\u1ee3ng (kh\u00f4ng t\u1ea1o ra nhi\u1ec7t) khi \u1edf tr\u1ea1ng th\u00e1i si\u00eau d\u1eabn.<\/li>\n<li><strong>\u0110\u1ed9 d\u1eabn \u0111i\u1ec7n:<\/strong> Khi \u1edf tr\u1ea1ng th\u00e1i si\u00eau d\u1eabn, \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n c\u1ee7a v\u1eadt li\u1ec7u \u0111\u1ea1t m\u1ee9c v\u00f4 h\u1ea1n, ngh\u0129a l\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 suy gi\u1ea3m \u0111i\u1ec7n n\u0103ng khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua.<\/li>\n<li><strong>Hi\u1ec7u su\u1ea5t nhi\u1ec7t Peltier:<\/strong> M\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi c\u00f3 hi\u1ec7u su\u1ea5t nhi\u1ec7t Peltier cao, ngh\u0129a l\u00e0 ch\u00fang c\u00f3 th\u1ec3 t\u1ea1o ra ho\u1eb7c h\u1ea5p th\u1ee5 nhi\u1ec7t m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 khi c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua.<\/li>\n<\/ul>\n<p>B\u00ean c\u1ea1nh \u0111\u00f3, c\u00e1c v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c c\u1ea7n \u0111\u01b0\u1ee3c ti\u1ebfp t\u1ee5c nghi\u00ean c\u1ee9u:<\/p>\n<ol>\n<li><strong>Kh\u1ea3 n\u0103ng gia c\u00f4ng:<\/strong> Vi\u1ec7c s\u1ea3n xu\u1ea5t v\u00e0 gia c\u00f4ng c\u00e1c v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi \u0111\u00f2i h\u1ecfi c\u00f4ng ngh\u1ec7 cao v\u00e0 k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p.<\/li>\n<li><strong>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t:<\/strong> V\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra v\u1ec1 s\u1ef1 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u00fang ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 trong th\u1eddi gian d\u00e0i.<\/li>\n<li><strong>Gi\u00e1 th\u00e0nh:<\/strong> Chi ph\u00ed s\u1ea3n xu\u1ea5t c\u00e1c v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi th\u01b0\u1eddng kh\u00e1 cao, l\u00e0m h\u1ea1n ch\u1ebf s\u1ef1 ph\u1ed5 bi\u1ebfn v\u00e0 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i.<\/li>\n<\/ol>\n<p>Nh\u00ecn chung, nghi\u00ean c\u1ee9u v\u1ec1 c\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi \u0111ang m\u1edf ra nh\u1eefng c\u01a1 h\u1ed9i v\u00e0 th\u00e1ch th\u1ee9c quan tr\u1ecdng cho ng\u00e0nh khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt. N\u1ebfu v\u01b0\u1ee3t qua \u0111\u01b0\u1ee3c nh\u1eefng th\u00e1ch th\u1ee9c hi\u1ec7n t\u1ea1i, c\u00e1c v\u1eadt li\u1ec7u n\u00e0y s\u1ebd mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch \u0111\u1ed9t ph\u00e1 cho c\u00e1c c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u si\u00eau d\u1eabn m\u1edbi: c\u00e1ch ch\u00fang ho\u1ea1t \u0111\u1ed9ng, \u01b0u \u0111i\u1ec3m, v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i.<\/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 Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u si\u00eau 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