{"id":680445,"date":"2024-08-15T18:14:52","date_gmt":"2024-08-15T17:14:52","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=680445"},"modified":"2024-08-15T18:14:52","modified_gmt":"2024-08-15T17:14:52","slug":"phan-tich-nhiet-vi-sai-dta","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/phan-tich-nhiet-vi-sai-dta\/","title":{"rendered":"Ph\u00e2n T\u00edch Nhi\u1ec7t Vi Sai (DTA)"},"content":{"rendered":"<p class=\"sidekick\">Ph\u00e2n T\u00edch Nhi\u1ec7t Vi Sai (DTA): Ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng s\u1ef1 kh\u00e1c bi\u1ec7t nhi\u1ec7t \u0111\u1ed9 gi\u1eefa m\u1eabu v\u00e0 ch\u1ea5t tham chi\u1ebfu \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 chuy\u1ec3n pha v\u00e0 t\u00ednh ch\u1ea5t nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/phan_tich_nhiet_vi_sai_dta.png\" alt=\"Ph\u00e2n T\u00edch Nhi\u1ec7t Vi Sai (DTA)\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Ph\u00e2n T\u00edch Nhi\u1ec7t Vi Sai (DTA)<\/h2>\n<p>Ph\u00e2n T\u00edch Nhi\u1ec7t Vi Sai (DTA &#8211; Differential Thermal Analysis) l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt ph\u00e2n t\u00edch nhi\u1ec7t quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 nghi\u00ean c\u1ee9u c\u00e1c thay \u0111\u1ed5i v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc c\u1ee7a v\u1eadt li\u1ec7u khi ch\u00fang \u0111\u01b0\u1ee3c nung n\u00f3ng ho\u1eb7c l\u00e0m l\u1ea1nh. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y so s\u00e1nh s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa m\u1ed9t m\u1eabu v\u1eadt v\u00e0 m\u1ed9t ch\u1ea5t chu\u1ea9n ho\u1eb7c m\u1eabu \u0111\u1ed1i ch\u1ee9ng khi c\u1ea3 hai \u0111\u01b0\u1ee3c cung c\u1ea5p c\u00f9ng m\u1ed9t nhi\u1ec7t l\u01b0\u1ee3ng.<\/p>\n<h2>Nguy\u00ean l\u00fd Ho\u1ea1t \u0111\u1ed9ng<\/h2>\n<p>Trong DTA, m\u1eabu v\u1eadt c\u1ea7n nghi\u00ean c\u1ee9u v\u00e0 ch\u1ea5t chu\u1ea9n \u0111\u01b0\u1ee3c nung n\u00f3ng d\u01b0\u1edbi c\u00f9ng m\u1ed9t \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9. H\u1ec7 th\u1ed1ng \u0111o s\u1ebd ghi l\u1ea1i s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa m\u1eabu v\u1eadt v\u00e0 ch\u1ea5t chu\u1ea9n. Nh\u1eefng thay \u0111\u1ed5i trong nhi\u1ec7t \u0111\u1ed9 n\u00e0y c\u00f3 th\u1ec3 cho th\u1ea5y c\u00e1c qu\u00e1 tr\u00ecnh nhi\u1ec7t nh\u01b0 n\u00f3ng ch\u1ea3y, k\u1ebft tinh, h\u00f3a h\u01a1i, hay c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc.<\/p>\n<h2>\u1ee8ng d\u1ee5ng c\u1ee7a DTA<\/h2>\n<p><u1><\/p>\n<li><b>Ph\u00e2n t\u00edch v\u1eadt li\u1ec7u:<\/b> DTA gi\u00fap x\u00e1c \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 chuy\u1ec3n pha c\u1ee7a c\u00e1c ch\u1ea5t, bao g\u1ed3m qu\u00e1 tr\u00ecnh n\u00f3ng ch\u1ea3y, \u0111\u00f3ng r\u1eafn, v\u00e0 ph\u00e2n h\u1ee7y nhi\u1ec7t.<\/li>\n<li><b>Nghi\u00ean c\u1ee9u ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc:<\/b> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y gi\u00fap hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1c ph\u1ea3n \u1ee9ng nhi\u1ec7t trong h\u00f3a h\u1ecdc nh\u01b0 s\u1ef1 ph\u00e2n h\u1ee7y, oxi h\u00f3a, v\u00e0 polymerization.<\/li>\n<li><b>\u0110i\u1ec1u tra \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t:<\/b> DTA c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau d\u01b0\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau.<\/li>\n<li><b>Ng\u00e0nh d\u01b0\u1ee3c ph\u1ea9m:<\/b> DTA \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong vi\u1ec7c ki\u1ec3m tra t\u00ednh ch\u1ea5t nhi\u1ec7t c\u1ee7a c\u00e1c h\u1ee3p ch\u1ea5t d\u01b0\u1ee3c ph\u1ea9m, \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a thu\u1ed1c.<\/li>\n<p><\/u1><\/p>\n<h2>C\u1ea5u t\u1ea1o v\u00e0 C\u00e1ch th\u1ef1c hi\u1ec7n<\/h2>\n<p><o1><\/p>\n<li><b>Thi\u1ebft b\u1ecb DTA:<\/b><br \/>\n        <u1><\/p>\n<li>Bu\u1ed3ng nhi\u1ec7t: N\u01a1i m\u00e0 m\u1eabu v\u1eadt v\u00e0 ch\u1ea5t chu\u1ea9n \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0 nung n\u00f3ng.<\/li>\n<li>C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9: \u0110o nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u1eabu v\u00e0 ch\u1ea5t chu\u1ea9n.<\/li>\n<li>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n: \u0110i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9 v\u00e0 ghi nh\u1eadn d\u1eef li\u1ec7u ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9.<\/li>\n<p>        <\/u1>\n    <\/li>\n<li><b>Quy tr\u00ecnh th\u1ef1c hi\u1ec7n:<\/b><br \/>\n        <u1><\/p>\n<li>Chu\u1ea9n b\u1ecb m\u1eabu v\u1eadt v\u00e0 ch\u1ea5t chu\u1ea9n v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng t\u01b0\u01a1ng \u0111\u1ed3ng.<\/li>\n<li>\u0110\u1eb7t m\u1eabu v\u1eadt v\u00e0 ch\u1ea5t chu\u1ea9n v\u00e0o bu\u1ed3ng nhi\u1ec7t.<\/li>\n<li>N\u00e2ng d\u1ea7n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a bu\u1ed3ng nhi\u1ec7t theo quy tr\u00ecnh \u0111\u1ecbnh tr\u01b0\u1edbc.<\/li>\n<li>Ghi l\u1ea1i s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa m\u1eabu v\u00e0 ch\u1ea5t chu\u1ea9n trong su\u1ed1t qu\u00e1 tr\u00ecnh nung n\u00f3ng.<\/li>\n<li>Ph\u00e2n t\u00edch \u0111\u1ed3 th\u1ecb nhi\u1ec7t \u0111\u1ed9 v\u00e0 th\u1eddi gian \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c qu\u00e1 tr\u00ecnh v\u00e0 ph\u1ea3n \u1ee9ng nhi\u1ec7t x\u1ea3y ra.<\/li>\n<p>        <\/u1>\n    <\/li>\n<p><\/o1><\/p>\n<h2>Ph\u00e9p t\u00ednh li\u00ean quan<\/h2>\n<p>Tr\u01b0\u1edbc ti\u00ean, gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 (\\(T\\)) v\u00e0 nhi\u1ec7t \u0111\u1ed9 ch\u00eanh l\u1ec7ch (\\(\\Delta T\\)) gi\u1eefa m\u1eabu v\u1eadt v\u00e0 ch\u1ea5t chu\u1ea9n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. N\u1ebfu \\(T_m\\) l\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u1eabu v\u00e0 \\(T_c\\) l\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u1ea5t chu\u1ea9n, th\u00ec:<\/p>\n<p>\\(\\Delta T = T_m &#8211; T_c\\)<\/p>\n<p>Vi\u1ec7c ph\u00e2n t\u00edch \\(\\Delta T\\) theo th\u1eddi gian ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 s\u1ebd cung c\u1ea5p th\u00f4ng tin v\u1ec1 qu\u00e1 tr\u00ecnh nhi\u1ec7t di\u1ec5n ra trong m\u1eabu v\u1eadt. V\u00ed d\u1ee5, m\u1ed9t \u0111\u1ec9nh tr\u00ean \u0111\u1ed3 th\u1ecb DTA c\u00f3 th\u1ec3 ch\u1ec9 ra s\u1ef1 n\u00f3ng ch\u1ea3y, trong khi m\u1ed9t \u0111\u00e1y c\u00f3 th\u1ec3 ch\u1ec9 ra s\u1ef1 k\u1ebft tinh.<\/p>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>DTA l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, gi\u00fap ch\u00fang ta hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 t\u00ednh ch\u1ea5t nhi\u1ec7t v\u00e0 c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc c\u1ee7a v\u1eadt li\u1ec7u. N\u00f3 c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n v\u1eadt li\u1ec7u m\u1edbi, c\u0169ng nh\u01b0 trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p t\u1eeb d\u01b0\u1ee3c ph\u1ea9m \u0111\u1ebfn ch\u1ebf t\u1ea1o kim lo\u1ea1i. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng DTA, ch\u00fang ta c\u00f3 th\u1ec3 \u0111\u01b0a ra nh\u1eefng quy\u1ebft \u0111\u1ecbnh ch\u00ednh x\u00e1c h\u01a1n trong thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t c\u00e1c s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 b\u1ec1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ph\u00e2n T\u00edch Nhi\u1ec7t Vi Sai (DTA): Ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng s\u1ef1 kh\u00e1c bi\u1ec7t nhi\u1ec7t \u0111\u1ed9 gi\u1eefa m\u1eabu v\u00e0 ch\u1ea5t tham chi\u1ebfu \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 chuy\u1ec3n pha v\u00e0 t\u00ednh ch\u1ea5t nhi\u1ec7t 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 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