{"id":50588,"date":"2023-04-21T14:42:11","date_gmt":"2023-04-21T19:42:11","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-does-piezoelectricity-work\/"},"modified":"2025-01-21T07:12:43","modified_gmt":"2025-01-21T12:12:43","slug":"how-does-piezoelectricity-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-does-piezoelectricity-work\/","title":{"rendered":"Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n: C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd k\u1ef3 di\u1ec7u, cho ph\u00e9p 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. \u0110\u00e2y l\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nhi\u1ec1u thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i, t\u1eeb b\u1eadt l\u1eeda gas \u0111\u1ebfn c\u00e1c c\u1ea3m bi\u1ebfn si\u00eau \u00e2m tinh vi. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, t\u1eeb c\u1ea5u tr\u00fac v\u1eadt li\u1ec7u \u0111\u1ebfn \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n.<\/p>\n

C\u1ea5u tr\u00fac tinh th\u1ec3 v\u00e0 s\u1ef1 ph\u00e2n c\u1ef1c \u0111i\u1ec7n<\/h3>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n x\u1ea3y ra trong c\u00e1c v\u1eadt li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac tinh th\u1ec3 kh\u00f4ng \u0111\u1ed1i x\u1ee9ng. \u1ede tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng, c\u00e1c \u0111i\u1ec7n t\u00edch trong tinh th\u1ec3 ph\u00e2n b\u1ed1 \u0111\u1ec1u, d\u1eabn \u0111\u1ebfn t\u1ed5ng \u0111i\u1ec7n t\u00edch b\u1eb1ng kh\u00f4ng. Tuy nhi\u00ean, khi tinh th\u1ec3 b\u1ecb bi\u1ebfn d\u1ea1ng do t\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ef1c b\u00ean ngo\u00e0i (n\u00e9n, k\u00e9o, u\u1ed1n), c\u1ea5u tr\u00fac tinh th\u1ec3 b\u1ecb thay \u0111\u1ed5i, l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng s\u1ef1 ph\u00e2n b\u1ed1 \u0111i\u1ec7n t\u00edch. S\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng n\u00e0y t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u.<\/p>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n thu\u1eadn v\u00e0 ngh\u1ecbch<\/h3>\n

C\u00f3 hai lo\u1ea1i hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n: thu\u1eadn v\u00e0 ngh\u1ecbch. Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n thu\u1eadn m\u00f4 t\u1ea3 vi\u1ec7c t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n b\u1ecb bi\u1ebfn d\u1ea1ng. Ng\u01b0\u1ee3c l\u1ea1i, hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch m\u00f4 t\u1ea3 s\u1ef1 bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u khi \u0111\u1eb7t m\u1ed9t \u0111i\u1ec7n \u00e1p v\u00e0o n\u00f3.<\/p>\n\n\n\n\n\n\n
Hi\u1ec7u \u1ee9ng<\/th>\n\u0110\u1ea7u v\u00e0o<\/th>\n\u0110\u1ea7u ra<\/th>\n<\/tr>\n<\/thead>\n
Thu\u1eadn<\/td>\nL\u1ef1c c\u01a1 h\u1ecdc (n\u00e9n, k\u00e9o, u\u1ed1n)<\/td>\n\u0110i\u1ec7n \u00e1p<\/td>\n<\/tr>\n
Ngh\u1ecbch<\/td>\n\u0110i\u1ec7n \u00e1p<\/td>\nBi\u1ebfn d\u1ea1ng c\u01a1 h\u1ecdc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/h3>\n

C\u00f3 nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u th\u1ec3 hi\u1ec7n t\u00ednh \u00e1p \u0111i\u1ec7n, bao g\u1ed3m c\u1ea3 g\u1ed1m, polymer v\u00e0 composite. M\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n ph\u1ed5 bi\u1ebfn bao g\u1ed3m th\u1ea1ch anh, g\u1ed1m PZT (ch\u00ec zirconate titanate) v\u00e0 PVDF (polyvinylidene fluoride). M\u1ed7i lo\u1ea1i v\u1eadt li\u1ec7u c\u00f3 nh\u1eefng \u0111\u1eb7c t\u00ednh ri\u00eang bi\u1ec7t, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p>\n

\u1ee8ng d\u1ee5ng c\u1ee7a hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n<\/h3>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y \u0111\u1ebfn c\u00f4ng ngh\u1ec7 cao. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n

    \n
  • B\u1eadt l\u1eeda gas:<\/strong> L\u1ef1c t\u00e1c \u0111\u1ed9ng l\u00ean n\u00fat b\u1eadt l\u1eeda l\u00e0m bi\u1ebfn d\u1ea1ng tinh th\u1ec3 \u00e1p \u0111i\u1ec7n, t\u1ea1o ra \u0111i\u1ec7n \u00e1p \u0111\u1ee7 l\u1edbn \u0111\u1ec3 t\u1ea1o tia l\u1eeda \u0111i\u1ec7n.<\/li>\n
  • C\u1ea3m bi\u1ebfn:<\/strong> C\u00e1c c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u00e1p su\u1ea5t, gia t\u1ed1c, v\u00e0 rung \u0111\u1ed9ng. Trong l\u0129nh v\u1ef1c y t\u1ebf, ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e1y si\u00eau \u00e2m. Trong c\u00f4ng nghi\u1ec7p, ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m.<\/li>\n
  • \u0110\u1ed9ng c\u01a1 si\u00eau \u00e2m:<\/strong> S\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch \u0111\u1ec3 t\u1ea1o ra c\u00e1c dao \u0111\u1ed9ng c\u01a1 h\u1ecdc \u1edf t\u1ea7n s\u1ed1 si\u00eau \u00e2m. M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb si\u00eau \u00e2m, v\u00ed d\u1ee5 nh\u01b0 trong l\u0129nh v\u1ef1c l\u00e0m s\u1ea1ch, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 n\u00e0y.<\/li>\n
  • Thi\u1ebft b\u1ecb t\u1ea1o n\u0103ng l\u01b0\u1ee3ng:<\/strong> C\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thu n\u0103ng l\u01b0\u1ee3ng t\u1eeb c\u00e1c ngu\u1ed3n rung \u0111\u1ed9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi ho\u1eb7c s\u00f3ng bi\u1ec3n.<\/li>\n<\/ul>\n

    T\u00f3m l\u1ea1i, hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd th\u00fa v\u1ecb v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng. S\u1ef1 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n m\u1edf ra nhi\u1ec1u kh\u1ea3 n\u0103ng cho vi\u1ec7c ph\u00e1t tri\u1ec3n c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi, \u0111\u00f3ng g\u00f3p v\u00e0o s\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd k\u1ef3 di\u1ec7u, cho ph\u00e9p 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. \u0110\u00e2y l\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nhi\u1ec1u thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i, t\u1eeb b\u1eadt l\u1eeda gas \u0111\u1ebfn c\u00e1c c\u1ea3m bi\u1ebfn si\u00eau \u00e2m tinh vi. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i<\/p>\n","protected":false},"author":1,"featured_media":23762,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-50588","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\/50588","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=50588"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50588\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/23762"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=50588"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=50588"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=50588"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}