{"id":50628,"date":"2023-04-21T14:39:27","date_gmt":"2023-04-21T19:39:27","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-does-piezo-work\/"},"modified":"2025-01-21T07:12:37","modified_gmt":"2025-01-21T12:12:37","slug":"how-does-piezo-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-does-piezo-work\/","title":{"rendered":"Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n: Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng"},"content":{"rendered":"

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, hay c\u00f2n g\u1ecdi l\u00e0 piezoelectric effect, l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd \u0111\u1eb7c bi\u1ec7t x\u1ea3y ra \u1edf m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh. Ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng khi \u0111\u1eb7t d\u01b0\u1edbi m\u1ed9t \u0111i\u1ec7n tr\u01b0\u1eddng. Kh\u1ea3 n\u0103ng k\u1ef3 di\u1ec7u n\u00e0y \u0111\u00e3 m\u1edf ra c\u00e1nh c\u1eeda cho v\u00f4 s\u1ed1 \u1ee9ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng hi\u1ec7n \u0111\u1ea1i, t\u1eeb nh\u1eefng thi\u1ebft b\u1ecb quen thu\u1ed9c h\u00e0ng ng\u00e0y \u0111\u1ebfn nh\u1eefng c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn trong y h\u1ecdc v\u00e0 c\u00f4ng nghi\u1ec7p. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o t\u00ecm hi\u1ec3u nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n.<\/p>\n

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

B\u1ea3n ch\u1ea5t c\u1ee7a hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n n\u1eb1m \u1edf c\u1ea5u tr\u00fac tinh th\u1ec3 \u0111\u1eb7c bi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u. C\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng c\u00f3 c\u1ea5u tr\u00fac tinh th\u1ec3 kh\u00f4ng \u0111\u1ed1i x\u1ee9ng, d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e2n c\u1ef1c \u0111i\u1ec7n b\u00ean trong. Khi kh\u00f4ng c\u00f3 ngo\u1ea1i l\u1ef1c t\u00e1c \u0111\u1ed9ng, c\u00e1c \u0111i\u1ec7n t\u00edch n\u00e0y t\u1ef1 c\u00e2n b\u1eb1ng v\u00e0 kh\u00f4ng t\u1ea1o ra \u0111i\u1ec7n \u00e1p b\u00ean ngo\u00e0i.<\/p>\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a \u00e1p l\u1ef1c c\u01a1 h\u1ecdc<\/h3>\n

Khi m\u1ed9t l\u1ef1c c\u01a1 h\u1ecdc t\u00e1c \u0111\u1ed9ng l\u00ean v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, c\u1ea5u tr\u00fac tinh th\u1ec3 b\u1ecb bi\u1ebfn d\u1ea1ng. S\u1ef1 bi\u1ebfn d\u1ea1ng n\u00e0y l\u00e0m thay \u0111\u1ed5i s\u1ef1 ph\u00e2n c\u1ef1c b\u00ean trong, khi\u1ebfn cho s\u1ef1 c\u00e2n b\u1eb1ng \u0111i\u1ec7n t\u00edch b\u1ecb ph\u00e1 v\u1ee1. K\u1ebft qu\u1ea3 l\u00e0 xu\u1ea5t hi\u1ec7n m\u1ed9t \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. \u0110i\u1ec7n \u00e1p n\u00e0y t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi \u00e1p l\u1ef1c t\u00e1c \u0111\u1ed9ng.<\/p>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch<\/h3>\n

Ng\u01b0\u1ee3c l\u1ea1i v\u1edbi hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp, hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch x\u1ea3y ra khi \u0111\u1eb7t v\u1eadt li\u1ec7u d\u01b0\u1edbi m\u1ed9t \u0111i\u1ec7n tr\u01b0\u1eddng. \u0110i\u1ec7n tr\u01b0\u1eddng n\u00e0y t\u00e1c \u0111\u1ed9ng l\u00ean c\u00e1c \u0111i\u1ec7n t\u00edch trong c\u1ea5u tr\u00fac tinh th\u1ec3, g\u00e2y ra s\u1ef1 thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u. V\u1eadt li\u1ec7u s\u1ebd gi\u00e3n n\u1edf ho\u1eb7c co l\u1ea1i t\u00f9y thu\u1ed9c v\u00e0o chi\u1ec1u c\u1ee7a \u0111i\u1ec7n tr\u01b0\u1eddng.<\/p>\n

C\u00e1c lo\u1ea1i 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 v\u1eadt li\u1ec7u t\u1ef1 nhi\u00ean nh\u01b0 th\u1ea1ch anh v\u00e0 g\u1ed1m \u00e1p \u0111i\u1ec7n nh\u00e2n t\u1ea1o nh\u01b0 PZT (lead zirconate titanate).<\/p>\n\n\n\n\n\n\n\n
Lo\u1ea1i v\u1eadt li\u1ec7u<\/th>\n\u01afu \u0111i\u1ec3m<\/th>\nNh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n<\/tr>\n<\/thead>\n
Th\u1ea1ch anh<\/td>\n\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh cao<\/td>\nHi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n y\u1ebfu<\/td>\n<\/tr>\n
G\u1ed1m PZT<\/td>\nHi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n m\u1ea1nh<\/td>\n\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00e9m h\u01a1n th\u1ea1ch anh<\/td>\n<\/tr>\n
PVDF (Polyvinylidene fluoride)<\/td>\nLinh ho\u1ea1t, d\u1ec5 ch\u1ebf t\u1ea1o<\/td>\nHi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n y\u1ebfu h\u01a1n PZT<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\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. V\u00ed d\u1ee5, trong c\u00e1c c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t, c\u1ea3m bi\u1ebfn gia t\u1ed1c, \u0111\u1ea7u \u0111\u00e1nh l\u1eeda c\u1ee7a b\u1eadt l\u1eeda, m\u00e1y si\u00eau \u00e2m, v.v… Trong l\u0129nh v\u1ef1c y t\u1ebf, hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft b\u1ecb si\u00eau \u00e2m ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng kh\u00e1c bao g\u1ed3m m\u00e1y in kim, thi\u1ebft b\u1ecb t\u1ea1o s\u00f3ng si\u00eau \u00e2m \u0111\u1ec3 l\u00e0m s\u1ea1ch, v\u00e0 th\u1eadm ch\u00ed c\u1ea3 trong vi\u1ec7c thu n\u0103ng l\u01b0\u1ee3ng t\u1eeb rung \u0111\u1ed9ng.<\/p>\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\u00e0 h\u1eefu \u00edch. 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 mang l\u1ea1i nhi\u1ec1u \u1ee9ng d\u1ee5ng \u0111a d\u1ea1ng v\u00e0 ti\u1ec1m n\u0103ng ph\u00e1t tri\u1ec3n trong t\u01b0\u01a1ng lai v\u1eabn c\u00f2n r\u1ea5t l\u1edbn. Vi\u1ec7c nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n m\u1edbi v\u1edbi hi\u1ec7u su\u1ea5t cao h\u01a1n v\u00e0 chi ph\u00ed th\u1ea5p h\u01a1n s\u1ebd ti\u1ebfp t\u1ee5c m\u1edf ra nh\u1eefng c\u00e1nh c\u1eeda m\u1edbi cho c\u00f4ng ngh\u1ec7 v\u00e0 cu\u1ed9c s\u1ed1ng con ng\u01b0\u1eddi.<\/p>\n","protected":false},"excerpt":{"rendered":"

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, hay c\u00f2n g\u1ecdi l\u00e0 piezoelectric effect, l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd \u0111\u1eb7c bi\u1ec7t x\u1ea3y ra \u1edf m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh. Ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a \u00e1p l\u1ef1c c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng khi \u0111\u1eb7t d\u01b0\u1edbi m\u1ed9t<\/p>\n","protected":false},"author":1,"featured_media":23776,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-50628","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\/50628","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=50628"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50628\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/23776"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=50628"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=50628"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=50628"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}