{"id":43772,"date":"2023-04-26T01:25:52","date_gmt":"2023-04-26T06:25:52","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-piezoelectricity\/"},"modified":"2025-01-21T07:28:59","modified_gmt":"2025-01-21T12:28:59","slug":"what-is-piezoelectricity","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-is-piezoelectricity\/","title":{"rendered":"Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n: Kh\u00e1m ph\u00e1 ngu\u1ed3n \u0111i\u1ec7n t\u1eeb \u00e1p l\u1ef1c"},"content":{"rendered":"

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n 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, cho ph\u00e9p ch\u00fang 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. N\u00f3i c\u00e1ch kh\u00e1c, khi \u00e1p l\u1ef1c c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng l\u00ean v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd t\u1ea1o ra \u0111i\u1ec7n t\u00edch. Ng\u01b0\u1ee3c l\u1ea1i, khi m\u1ed9t \u0111i\u1ec7n tr\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng l\u00ean v\u1eadt li\u1ec7u n\u00e0y, n\u00f3 s\u1ebd bi\u1ebfn d\u1ea1ng ho\u1eb7c thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc. Kh\u00e1m ph\u00e1 n\u00e0y \u0111\u00e3 m\u1edf ra c\u00e1nh c\u1eeda cho v\u00f4 s\u1ed1 \u1ee9ng d\u1ee5ng trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y v\u00e0 c\u00e1c l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 cao.<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n<\/h3>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n xu\u1ea5t ph\u00e1t t\u1eeb c\u1ea5u tr\u00fac tinh th\u1ec3 b\u1ea5t \u0111\u1ed1i x\u1ee9ng c\u1ee7a v\u1eadt li\u1ec7u. Khi v\u1eadt li\u1ec7u b\u1ecb n\u00e9n ho\u1eb7c k\u00e9o gi\u00e3n, s\u1ef1 thay \u0111\u1ed5i n\u00e0y l\u00e0m l\u1ec7ch t\u00e2m \u0111i\u1ec7n t\u00edch b\u00ean trong c\u1ea5u tr\u00fac tinh th\u1ec3, t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n tr\u01b0\u1eddng v\u00e0 do \u0111\u00f3 t\u1ea1o ra \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp. Ng\u01b0\u1ee3c l\u1ea1i, khi m\u1ed9t \u0111i\u1ec7n tr\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng, n\u00f3 l\u00e0m thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng c\u1ee7a c\u1ea5u tr\u00fac tinh th\u1ec3, g\u00e2y ra s\u1ef1 gi\u00e3n n\u1edf ho\u1eb7c co l\u1ea1i c\u1ee7a v\u1eadt li\u1ec7u. \u0110\u00e2y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch.<\/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 v\u00e0 v\u1eadt li\u1ec7u nh\u00e2n t\u1ea1o.<\/p>\n\n\n\n\n\n\n\n\n
Lo\u1ea1i v\u1eadt li\u1ec7u<\/th>\nV\u00ed d\u1ee5<\/th>\n\u01afu \u0111i\u1ec3m<\/th>\nNh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n<\/tr>\n<\/thead>\n
G\u1ed1m \u00e1p \u0111i\u1ec7n<\/td>\nPZT (Lead Zirconate Titanate)<\/td>\nHi\u1ec7u su\u1ea5t cao, gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd<\/td>\nCh\u1ee9a ch\u00ec (c\u00f3 h\u1ea1i cho m\u00f4i tr\u01b0\u1eddng)<\/td>\n<\/tr>\n
Tinh th\u1ec3<\/td>\nTh\u1ea1ch anh<\/td>\n\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh cao<\/td>\nHi\u1ec7u su\u1ea5t th\u1ea5p h\u01a1n g\u1ed1m<\/td>\n<\/tr>\n
Polymer<\/td>\nPVDF (Polyvinylidene Fluoride)<\/td>\nLinh ho\u1ea1t, nh\u1eb9<\/td>\nHi\u1ec7u su\u1ea5t th\u1ea5p h\u01a1n g\u1ed1m v\u00e0 tinh th\u1ec3<\/td>\n<\/tr>\n
Composite<\/td>\nK\u1ebft h\u1ee3p g\u1ed1m v\u00e0 polymer<\/td>\nK\u1ebft h\u1ee3p \u01b0u \u0111i\u1ec3m c\u1ee7a c\u1ea3 hai<\/td>\nQu\u00e1 tr\u00ecnh ch\u1ebf t\u1ea1o ph\u1ee9c t\u1ea1p<\/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 c\u00f3 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed h\u00e0ng ng\u00e0y \u0111\u1ebfn c\u00e1c c\u00f4ng ngh\u1ec7 y t\u1ebf v\u00e0 c\u00f4ng nghi\u1ec7p ti\u00ean ti\u1ebfn. M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n

    \n
  • \u0110\u1ea7u d\u00f2 si\u00eau \u00e2m:<\/strong> Trong l\u0129nh v\u1ef1c y t\u1ebf, hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m cho m\u1ee5c \u0111\u00edch ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh. C\u00e1c \u0111\u1ea7u d\u00f2 si\u00eau \u00e2m s\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ngh\u1ecbch \u0111\u1ec3 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m v\u00e0 hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp \u0111\u1ec3 nh\u1eadn t\u00edn hi\u1ec7u ph\u1ea3n x\u1ea1.<\/li>\n
  • M\u1ed3i l\u1eeda:<\/strong> Trong b\u1eadt l\u1eeda ga, l\u1ef1c c\u01a1 h\u1ecdc t\u00e1c \u0111\u1ed9ng l\u00ean tinh th\u1ec3 \u00e1p \u0111i\u1ec7n t\u1ea1o ra tia l\u1eeda \u0111i\u1ec7n \u0111\u1ec3 \u0111\u1ed1t ch\u00e1y kh\u00ed gas.<\/li>\n
  • C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t:<\/strong> Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u00e1p su\u1ea5t trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t l\u1ed1p xe.<\/li>\n
  • \u0110\u1ed9ng c\u01a1 \u00e1p \u0111i\u1ec7n:<\/strong> C\u00e1c \u0111\u1ed9ng c\u01a1 \u00e1p \u0111i\u1ec7n nh\u1ecf g\u1ecdn v\u00e0 ch\u00ednh x\u00e1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 \u1ed5 \u0111\u0129a c\u1ee9ng v\u00e0 m\u00e1y \u1ea3nh.<\/li>\n
  • B\u1ed9 t\u1ea1o dao \u0111\u1ed9ng:<\/strong> Tinh th\u1ec3 th\u1ea1ch anh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u1ed3ng h\u1ed3 v\u00e0 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00e1c \u0111\u1ec3 t\u1ea1o ra t\u00edn hi\u1ec7u dao \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh.<\/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 quan tr\u1ecdng v\u1edbi kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng gi\u1eefa d\u1ea1ng c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n. S\u1ef1 \u0111a d\u1ea1ng v\u1ec1 v\u1eadt li\u1ec7u v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3 \u0111\u00e3 v\u00e0 \u0111ang \u0111\u00f3ng g\u00f3p \u0111\u00e1ng k\u1ec3 v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a khoa h\u1ecdc c\u00f4ng ngh\u1ec7 v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c s\u1ed1ng con ng\u01b0\u1eddi. T\u1eeb c\u00e1c thi\u1ebft b\u1ecb y t\u1ebf c\u1ee9u s\u1ed1ng \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p ti\u00ean ti\u1ebfn, hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n ti\u1ebfp t\u1ee5c kh\u1eb3ng \u0111\u1ecbnh vai tr\u00f2 thi\u1ebft y\u1ebfu c\u1ee7a m\u00ecnh trong th\u1ebf gi\u1edbi hi\u1ec7n \u0111\u1ea1i.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n 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, cho ph\u00e9p ch\u00fang 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. N\u00f3i c\u00e1ch kh\u00e1c, khi \u00e1p l\u1ef1c c\u01a1 h\u1ecdc \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng l\u00ean v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd<\/p>\n","protected":false},"author":1,"featured_media":1247,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-43772","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\/43772","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=43772"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/43772\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/1247"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=43772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=43772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=43772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}