{"id":675625,"date":"2024-10-12T01:03:32","date_gmt":"2024-10-12T00:03:32","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=675625"},"modified":"2024-10-12T01:03:32","modified_gmt":"2024-10-12T00:03:32","slug":"anh-huong-cua-su-chuyen-pha-den-tinh-chat-cua-vat-lieu","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/anh-huong-cua-su-chuyen-pha-den-tinh-chat-cua-vat-lieu\/","title":{"rendered":"\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 chuy\u1ec3n pha \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u"},"content":{"rendered":"<p class=\"sidekick\">\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 chuy\u1ec3n pha \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u: T\u00ecm hi\u1ec3u c\u00e1ch bi\u1ebfn \u0111\u1ed5i pha l\u00e0m thay \u0111\u1ed5i \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc, nhi\u1ec7t h\u1ecdc v\u00e0 \u0111i\u1ec7n c\u1ee7a v\u1eadt li\u1ec7u<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/anh_huong_cua_su_chuyen_pha_den_tinh_chat_cua_vat_lieu.png\" alt=\"\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 chuy\u1ec3n pha \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 chuy\u1ec3n pha \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u<\/h2>\n<p>Trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, s\u1ef1 chuy\u1ec3n pha c\u1ee7a v\u1eadt li\u1ec7u \u0111\u00f3ng vai tr\u00f2 r\u1ea5t quan tr\u1ecdng. S\u1ef1 chuy\u1ec3n pha kh\u00f4ng ch\u1ec9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u00ecnh th\u00e1i m\u00e0 c\u00f2n \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, nhi\u1ec7t h\u1ecdc v\u00e0 \u0111i\u1ec7n t\u1eeb c\u1ee7a v\u1eadt li\u1ec7u. D\u01b0\u1edbi \u0111\u00e2y, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 c\u00e1c d\u1ea1ng chuy\u1ec3n pha ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch ch\u00fang t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<h3>S\u1ef1 chuy\u1ec3n pha l\u00e0 g\u00ec?<\/h3>\n<p>S\u1ef1 chuy\u1ec3n pha l\u00e0 qu\u00e1 tr\u00ecnh m\u00e0 v\u1eadt li\u1ec7u chuy\u1ec3n \u0111\u1ed5i t\u1eeb m\u1ed9t d\u1ea1ng pha (ho\u1eb7c tr\u1ea1ng th\u00e1i v\u1eadt l\u00fd) sang m\u1ed9t d\u1ea1ng pha kh\u00e1c. C\u00e1c d\u1ea1ng pha ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<p><u1><\/p>\n<li>R\u1eafn<\/li>\n<li>L\u1ecfng<\/li>\n<li>Kh\u00ed<\/li>\n<li>Plasma<\/li>\n<p><\/u1><\/p>\n<p>V\u00ed d\u1ee5 d\u1ec5 hi\u1ec3u nh\u1ea5t v\u1ec1 s\u1ef1 chuy\u1ec3n pha l\u00e0 s\u1ef1 tan ch\u1ea3y c\u1ee7a b\u0103ng th\u00e0nh n\u01b0\u1edbc ho\u1eb7c s\u1ef1 bay h\u01a1i c\u1ee7a n\u01b0\u1edbc th\u00e0nh h\u01a1i.<\/p>\n<h3>C\u00e1c d\u1ea1ng chuy\u1ec3n pha quan tr\u1ecdng<\/h3>\n<h4>1. Chuy\u1ec3n t\u1eeb r\u1eafn sang l\u1ecfng<\/h4>\n<p>Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &#8220;n\u00f3ng ch\u1ea3y&#8221;. Khi m\u1ed9t v\u1eadt li\u1ec7u r\u1eafn nh\u01b0 kim lo\u1ea1i \u0111\u01b0\u1ee3c nung n\u00f3ng t\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y c\u1ee7a n\u00f3, c\u00e1c li\u00ean k\u1ebft trong c\u1ea5u tr\u00fac r\u1eafn b\u1ecb ph\u00e1 v\u1ee1, cho ph\u00e9p c\u00e1c ph\u00e2n t\u1eed di chuy\u1ec3n t\u1ef1 do h\u01a1n v\u00e0 chuy\u1ec3n sang tr\u1ea1ng th\u00e1i l\u1ecfng.<\/p>\n<h4>2. Chuy\u1ec3n t\u1eeb l\u1ecfng sang kh\u00ed<\/h4>\n<p>Qu\u00e1 tr\u00ecnh n\u00e0y x\u1ea3y ra khi l\u1ecfng \u0111\u1ea1t \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 s\u00f4i, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &#8220;bay h\u01a1i&#8221;. C\u00e1c ph\u00e2n t\u1eed trong ch\u1ea5t l\u1ecfng c\u00f3 \u0111\u1ee7 n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec3 v\u01b0\u1ee3t qua l\u1ef1c h\u1ea5p d\u1eabn gi\u1eefa ch\u00fang, chuy\u1ec3n sang tr\u1ea1ng th\u00e1i kh\u00ed.<\/p>\n<h4>3. Chuy\u1ec3n t\u1eeb r\u1eafn sang kh\u00ed<\/h4>\n<p>Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 &#8220;th\u0103ng hoa&#8221;. M\u1ed9t v\u00ed d\u1ee5 n\u1ed5i b\u1eadt l\u00e0 s\u1ef1 chuy\u1ec3n pha c\u1ee7a b\u0103ng kh\u00f4 (carbon dioxide r\u1eafn) tr\u1ef1c ti\u1ebfp th\u00e0nh kh\u00ed m\u00e0 kh\u00f4ng qua tr\u1ea1ng th\u00e1i l\u1ecfng.<\/p>\n<h3>\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 chuy\u1ec3n pha \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u<\/h3>\n<p>S\u1ef1 chuy\u1ec3n pha c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u1ea3nh h\u01b0\u1edfng ch\u00ednh:<\/p>\n<ul>\n<li><b>T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc:<\/b> Kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c v\u00e0 d\u1ebbo dai c\u1ee7a v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 thay \u0111\u1ed5i l\u1edbn trong qu\u00e1 tr\u00ecnh chuy\u1ec3n pha. V\u00ed d\u1ee5, khi kim lo\u1ea1i n\u00f3ng ch\u1ea3y, n\u00f3 d\u1ec5 d\u00e0ng b\u1ecb bi\u1ebfn d\u1ea1ng h\u01a1n so v\u1edbi tr\u1ea1ng th\u00e1i r\u1eafn.<\/li>\n<li><b>T\u00ednh ch\u1ea5t nhi\u1ec7t:<\/b> Nhi\u1ec7t dung (heat capacity) v\u00e0 h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u c\u0169ng c\u00f3 th\u1ec3 thay \u0111\u1ed5i. V\u00ed d\u1ee5, n\u01b0\u1edbc c\u00f3 h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t cao h\u01a1n nhi\u1ec1u khi \u1edf tr\u1ea1ng th\u00e1i l\u1ecfng so v\u1edbi khi \u1edf tr\u1ea1ng th\u00e1i r\u1eafn (b\u0103ng).<\/li>\n<li><b>T\u00ednh ch\u1ea5t \u0111i\u1ec7n t\u1eeb:<\/b> M\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u thay \u0111\u1ed5i t\u00ednh ch\u1ea5t \u0111i\u1ec7n v\u00e0 t\u1eeb c\u1ee7a ch\u00fang khi chuy\u1ec3n pha. V\u00ed d\u1ee5, nhi\u1ec7t \u0111i\u1ec7n tr\u1edf c\u1ee7a kim lo\u1ea1i thay \u0111\u1ed5i khi ch\u00fang chuy\u1ec3n t\u1eeb r\u1eafn sang l\u1ecfng.<\/li>\n<\/ul>\n<h3>\u1ee8ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a s\u1ef1 chuy\u1ec3n pha<\/h3>\n<p>Hi\u1ec3u v\u00e0 ki\u1ec3m so\u00e1t s\u1ef1 chuy\u1ec3n pha c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt v\u00e0 c\u00f4ng nghi\u1ec7p:<\/p>\n<ol>\n<li><b>S\u1ea3n xu\u1ea5t v\u1eadt li\u1ec7u:<\/b> Luy\u1ec7n kim v\u00e0 ch\u1ebf t\u1ea1o b\u00e1n d\u1eabn \u0111\u1ec1u y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c nhi\u1ec7t \u0111\u1ed9 v\u00e0 tr\u1ea1ng th\u00e1i pha c\u1ee7a v\u1eadt li\u1ec7u.<\/li>\n<li><b>Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t:<\/b> S\u1ef1 chuy\u1ec3n pha c\u1ee7a ch\u1ea5t l\u00e0m m\u00e1t (nh\u01b0 Freon) trong h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed gi\u00fap h\u1ea5p thu nhi\u1ec7t hi\u1ec7u qu\u1ea3.<\/li>\n<li><b>L\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng:<\/b> C\u00e1c h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t th\u01b0\u1eddng s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u chuy\u1ec3n pha (PCM) \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 ph\u00e1t l\u1ea1i nhi\u1ec7t.<\/li>\n<\/ol>\n<p>Hi\u1ec3u bi\u1ebft v\u1ec1 s\u1ef1 chuy\u1ec3n pha v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ebfn t\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 n\u00e2ng cao hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt. Ch\u00ednh v\u00ec th\u1ebf, nghi\u00ean c\u1ee9u v\u1ec1 s\u1ef1 chuy\u1ec3n pha ti\u1ebfp t\u1ee5c l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 chuy\u1ec3n pha \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u: T\u00ecm hi\u1ec3u c\u00e1ch bi\u1ebfn \u0111\u1ed5i pha l\u00e0m thay \u0111\u1ed5i \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc, nhi\u1ec7t h\u1ecdc v\u00e0 \u0111i\u1ec7n c\u1ee7a v\u1eadt li\u1ec7u<\/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>\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 chuy\u1ec3n pha \u0111\u1ebfn t\u00ednh ch\u1ea5t 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