{"id":54582,"date":"2022-07-20T08:55:24","date_gmt":"2022-07-20T13:55:24","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/piezo-ceramics-how-to-explain-thepyroelectric-effect\/"},"modified":"2025-01-21T07:25:39","modified_gmt":"2025-01-21T12:25:39","slug":"piezo-ceramics-how-to-explain-thepyroelectric-effect","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/piezo-ceramics-how-to-explain-thepyroelectric-effect\/","title":{"rendered":"Gi\u1ea3i th\u00edch Hi\u1ec7u \u1ee9ng Nhi\u1ec7t \u0111i\u1ec7n trong G\u1ed1m Piezo"},"content":{"rendered":"

G\u1ed1m \u00e1p \u0111i\u1ec7n, m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u g\u1ed1m \u0111\u1eb7c bi\u1ec7t c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, c\u0169ng th\u1ec3 hi\u1ec7n m\u1ed9t hi\u1ec7u \u1ee9ng th\u00fa v\u1ecb kh\u00e1c g\u1ecdi l\u00e0 hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n. Hi\u1ec7u \u1ee9ng n\u00e0y cho ph\u00e9p v\u1eadt li\u1ec7u t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a n\u00f3 thay \u0111\u1ed5i. V\u1eady hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n trong g\u1ed1m \u00e1p \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u01a1 ch\u1ebf \u0111\u1eb1ng sau hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y.<\/p>\n

C\u1ea5u tr\u00fac tinh th\u1ec3 v\u00e0 ph\u00e2n c\u1ef1c t\u1ef1 ph\u00e1t<\/h3>\n

G\u1ed1m \u00e1p \u0111i\u1ec7n, v\u00ed d\u1ee5 nh\u01b0 Lead Zirconate Titanate (PZT), s\u1edf h\u1eefu c\u1ea5u tr\u00fac tinh th\u1ec3 kh\u00f4ng \u0111\u1ed1i x\u1ee9ng. \u1ede nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, c\u1ea5u tr\u00fac n\u00e0y th\u1ec3 hi\u1ec7n s\u1ef1 ph\u00e2n c\u1ef1c t\u1ef1 ph\u00e1t, ngh\u0129a l\u00e0 c\u00e1c \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng v\u00e0 \u00e2m trong tinh th\u1ec3 b\u1ecb l\u1ec7ch kh\u1ecfi trung t\u00e2m, t\u1ea1o ra m\u1ed9t momen l\u01b0\u1ee1ng c\u1ef1c \u0111i\u1ec7n. Momen n\u00e0y t\u1ed3n t\u1ea1i ngay c\u1ea3 khi kh\u00f4ng c\u00f3 tr\u01b0\u1eddng \u0111i\u1ec7n b\u00ean ngo\u00e0i.<\/p>\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 l\u00ean ph\u00e2n c\u1ef1c<\/h3>\n

Khi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a g\u1ed1m \u00e1p \u0111i\u1ec7n thay \u0111\u1ed5i, c\u1ea5u tr\u00fac tinh th\u1ec3 c\u0169ng gi\u00e3n n\u1edf ho\u1eb7c co l\u1ea1i. S\u1ef1 thay \u0111\u1ed5i n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 ph\u00e2n c\u1ef1c t\u1ef1 ph\u00e1t. Khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng, dao \u0111\u1ed9ng nhi\u1ec7t c\u1ee7a c\u00e1c nguy\u00ean t\u1eed m\u1ea1nh h\u01a1n, l\u00e0m gi\u1ea3m s\u1ef1 ph\u00e2n c\u1ef1c t\u1ef1 ph\u00e1t. Ng\u01b0\u1ee3c l\u1ea1i, khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, dao \u0111\u1ed9ng nhi\u1ec7t y\u1ebfu \u0111i, v\u00e0 s\u1ef1 ph\u00e2n c\u1ef1c t\u1ef1 ph\u00e1t t\u0103ng l\u00ean.<\/p>\n

C\u01a1 ch\u1ebf t\u1ea1o ra \u0111i\u1ec7n \u00e1p<\/h3>\n

S\u1ef1 thay \u0111\u1ed5i trong ph\u00e2n c\u1ef1c t\u1ef1 ph\u00e1t do nhi\u1ec7t \u0111\u1ed9 g\u00e2y ra t\u1ea1o n\u00ean m\u1ed9t d\u00f2ng \u0111i\u1ec7n tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. \u0110\u00e2y ch\u00ednh l\u00e0 hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n. \u0110i\u1ec7n \u00e1p t\u1ea1o ra t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 v\u00e0 h\u1ec7 s\u1ed1 nhi\u1ec7t \u0111i\u1ec7n c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n

\u1ee8ng d\u1ee5ng c\u1ee7a hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n<\/h3>\n

Hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n trong g\u1ed1m \u00e1p \u0111i\u1ec7n c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf, bao g\u1ed3m:<\/p>\n\n\n\n\n\n\n\n
\u1ee8ng d\u1ee5ng<\/th>\nM\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
C\u1ea3m bi\u1ebfn h\u1ed3ng ngo\u1ea1i<\/td>\nD\u00f9ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n b\u1ee9c x\u1ea1 h\u1ed3ng ngo\u1ea1i, \u1ee9ng d\u1ee5ng trong camera nhi\u1ec7t, h\u1ec7 th\u1ed1ng an ninh.<\/td>\n<\/tr>\n
C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9<\/td>\n\u0110o l\u01b0\u1eddng s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 trong m\u00f4i tr\u01b0\u1eddng.<\/td>\n<\/tr>\n
Thu n\u0103ng l\u01b0\u1ee3ng<\/td>\nChuy\u1ec3n \u0111\u1ed5i nhi\u1ec7t n\u0103ng th\u00e0nh \u0111i\u1ec7n n\u0103ng.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

So s\u00e1nh hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n v\u00e0 \u00e1p \u0111i\u1ec7n<\/h3>\n\n\n\n\n\n\n\n
\u0110\u1eb7c \u0111i\u1ec3m<\/th>\nHi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n<\/th>\nHi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n<\/th>\n<\/tr>\n<\/thead>\n
Ngu\u1ed3n k\u00edch th\u00edch<\/td>\nThay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9<\/td>\nL\u1ef1c c\u01a1 h\u1ecdc<\/td>\n<\/tr>\n
\u0110\u1ea7u ra<\/td>\n\u0110i\u1ec7n \u00e1p<\/td>\n\u0110i\u1ec7n \u00e1p<\/td>\n<\/tr>\n
\u1ee8ng d\u1ee5ng<\/td>\nC\u1ea3m bi\u1ebfn h\u1ed3ng ngo\u1ea1i, c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9<\/td>\n\u0110\u1ea7u d\u00f2 si\u00eau \u00e2m, m\u00e1y ph\u00e1t \u0111i\u1ec7n \u00e1p \u0111i\u1ec7n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n trong g\u1ed1m \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd th\u00fa v\u1ecb v\u00e0 h\u1eefu \u00edch. S\u1ef1 bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 th\u00e0nh \u0111i\u1ec7n \u00e1p m\u1edf ra nhi\u1ec1u kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c nhau, t\u1eeb c\u1ea3m bi\u1ebfn \u0111\u1ebfn thu n\u0103ng l\u01b0\u1ee3ng. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u01a1 ch\u1ebf \u0111\u1eb1ng sau hi\u1ec7u \u1ee9ng n\u00e0y s\u1ebd gi\u00fap ch\u00fang ta khai th\u00e1c t\u1ed1i \u0111a ti\u1ec1m n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u g\u1ed1m \u00e1p \u0111i\u1ec7n trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"

G\u1ed1m \u00e1p \u0111i\u1ec7n, m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u g\u1ed1m \u0111\u1eb7c bi\u1ec7t c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, c\u0169ng th\u1ec3 hi\u1ec7n m\u1ed9t hi\u1ec7u \u1ee9ng th\u00fa v\u1ecb kh\u00e1c g\u1ecdi l\u00e0 hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n. Hi\u1ec7u \u1ee9ng n\u00e0y cho ph\u00e9p v\u1eadt li\u1ec7u t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi nhi\u1ec7t \u0111\u1ed9<\/p>\n","protected":false},"author":1,"featured_media":543,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-54582","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/54582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=54582"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/54582\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/543"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=54582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=54582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=54582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}