{"id":55498,"date":"2022-05-20T11:10:43","date_gmt":"2022-05-20T16:10:43","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/is-there-a-possibility-of-using-piezoceramic-actuators-at-cryogenic-temperatures\/"},"modified":"2025-01-21T07:25:16","modified_gmt":"2025-01-21T12:25:16","slug":"is-there-a-possibility-of-using-piezoceramic-actuators-at-cryogenic-temperatures","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/is-there-a-possibility-of-using-piezoceramic-actuators-at-cryogenic-temperatures\/","title":{"rendered":"Kh\u1ea3 n\u0103ng \u00e1p d\u1ee5ng g\u1ed1m \u00e1p \u0111i\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f4ng l\u1ea1nh"},"content":{"rendered":"

Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb truy\u1ec1n \u0111\u1ed9ng \u00e1p \u0111i\u1ec7n (piezoceramic actuators) \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f4ng l\u1ea1nh (cryogenic temperatures) l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c nghi\u00ean c\u1ee9u \u0111ang \u0111\u01b0\u1ee3c quan t\u00e2m, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng v\u0169 tr\u1ee5, y t\u1ebf v\u00e0 khoa h\u1ecdc v\u1eadt li\u1ec7u. M\u1eb7c d\u00f9 piezoceramic c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m nh\u01b0 k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn, \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 \u0111\u00e1p \u1ee9ng nhanh, nh\u01b0ng hi\u1ec7u su\u1ea5t c\u1ee7a ch\u00fang \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p l\u1ea1i \u0111\u1eb7t ra nhi\u1ec1u th\u00e1ch th\u1ee9c.<\/p>\n

Hi\u1ec7u su\u1ea5t c\u1ee7a Piezoceramic \u1edf Nhi\u1ec7t \u0111\u1ed9 Th\u1ea5p<\/h3>\n

\u1ede nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3. H\u1ec7 s\u1ed1 \u00e1p \u0111i\u1ec7n (d), h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i (\u03b5) v\u00e0 \u0111i\u1ec7n tr\u1edf su\u1ea5t (\u03c1) \u0111\u1ec1u b\u1ecb \u1ea3nh h\u01b0\u1edfng. Th\u00f4ng th\u01b0\u1eddng, h\u1ec7 s\u1ed1 \u00e1p \u0111i\u1ec7n gi\u1ea3m khi nhi\u1ec7t \u0111\u1ed9 gi\u1ea3m, d\u1eabn \u0111\u1ebfn hi\u1ec7u su\u1ea5t truy\u1ec1n \u0111\u1ed9ng k\u00e9m h\u01a1n.<\/p>\n

Th\u00e1ch th\u1ee9c v\u00e0 Gi\u1ea3i ph\u00e1p<\/h3>\n

M\u1ed9t th\u00e1ch th\u1ee9c quan tr\u1ecdng l\u00e0 s\u1ef1 gi\u1ea3m \u0111\u00e1ng k\u1ec3 c\u1ee7a \u0111\u1ed9 nh\u1ea1y \u00e1p \u0111i\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f4ng l\u1ea1nh. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u1ea7n ph\u1ea3i \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p cao h\u01a1n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00f9ng m\u1ed9t m\u1ee9c \u0111\u1ed9 d\u1ecbch chuy\u1ec3n. Th\u00eam v\u00e0o \u0111\u00f3, s\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t c\u1ee7a nhi\u1ec7t \u0111\u1ed9 c\u00f3 th\u1ec3 g\u00e2y ra \u1ee9ng su\u1ea5t nhi\u1ec7t, d\u1eabn \u0111\u1ebfn n\u1ee9t g\u00e3y ho\u1eb7c h\u1ecfng h\u00f3c v\u1eadt li\u1ec7u. \u0110\u1ec3 kh\u1eafc ph\u1ee5c nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111ang t\u00ecm ki\u1ebfm c\u00e1c v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n m\u1edbi v\u1edbi hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. Vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a thi\u1ebft b\u1ecb truy\u1ec1n \u0111\u1ed9ng c\u0169ng l\u00e0 m\u1ed9t h\u01b0\u1edbng ti\u1ebfp c\u1eadn quan tr\u1ecdng.<\/p>\n

L\u1ef1a ch\u1ecdn V\u1eadt li\u1ec7u Piezoceramic<\/h3>\n

Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1ed9t s\u1ed1 lo\u1ea1i v\u1eadt li\u1ec7u piezoceramic th\u1ec3 hi\u1ec7n t\u00ednh \u1ed5n \u0111\u1ecbnh t\u1ed1t h\u01a1n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p so v\u1edbi c\u00e1c lo\u1ea1i kh\u00e1c.<\/p>\n\n\n\n\n\n\n\n
V\u1eadt li\u1ec7u<\/th>\nNhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng (K)<\/th>\nH\u1ec7 s\u1ed1 \u00e1p \u0111i\u1ec7n (pC\/N) \u1edf 77K<\/th>\n<\/tr>\n<\/thead>\n
PZT<\/td>\n>77<\/td>\nGi\u1ea3m \u0111\u00e1ng k\u1ec3<\/td>\n<\/tr>\n
PMN-PT<\/td>\n>77<\/td>\nT\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh<\/td>\n<\/tr>\n
PLZT<\/td>\n>77<\/td>\nT\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ee8ng d\u1ee5ng Ti\u1ec1m n\u0103ng<\/h3>\n

M\u1eb7c d\u00f9 c\u00f2n nhi\u1ec1u th\u00e1ch th\u1ee9c, ti\u1ec1m n\u0103ng \u1ee9ng d\u1ee5ng c\u1ee7a piezoceramic actuators \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f4ng l\u1ea1nh r\u1ea5t l\u1edbn. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft b\u1ecb vi ph\u1eabu, k\u00ednh thi\u00ean v\u0103n v\u0169 tr\u1ee5, v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng c\u1ea3m bi\u1ebfn ho\u1ea1t \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng c\u1ef1c l\u1ea1nh. V\u00ed d\u1ee5, trong k\u00ednh thi\u00ean v\u0103n v\u0169 tr\u1ee5, c\u00e1c thi\u1ebft b\u1ecb truy\u1ec1n \u0111\u1ed9ng \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ch\u00ednh x\u00e1c v\u1ecb tr\u00ed c\u1ee7a g\u01b0\u01a1ng.<\/p>\n

K\u1ebft lu\u1eadn<\/h3>\n

S\u1eed d\u1ee5ng piezoceramic actuators \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f4ng l\u1ea1nh l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c \u0111\u1ea7y h\u1ee9a h\u1eb9n nh\u01b0ng c\u0169ng \u0111\u1ea7y th\u00e1ch th\u1ee9c. Vi\u1ec7c nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c v\u1eadt li\u1ec7u m\u1edbi, k\u1ebft h\u1ee3p v\u1edbi c\u00e1c k\u1ef9 thu\u1eadt thi\u1ebft k\u1ebf t\u1ed1i \u01b0u, s\u1ebd m\u1edf ra c\u00e1nh c\u1eeda cho nhi\u1ec1u \u1ee9ng d\u1ee5ng \u0111\u1ed9t ph\u00e1 trong t\u01b0\u01a1ng lai. S\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 h\u00e0nh vi c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 khai th\u00e1c t\u1ed1i \u0111a ti\u1ec1m n\u0103ng c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y.<\/p>\n","protected":false},"excerpt":{"rendered":"

Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb truy\u1ec1n \u0111\u1ed9ng \u00e1p \u0111i\u1ec7n (piezoceramic actuators) \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f4ng l\u1ea1nh (cryogenic temperatures) l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c nghi\u00ean c\u1ee9u \u0111ang \u0111\u01b0\u1ee3c quan t\u00e2m, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng v\u0169 tr\u1ee5, y t\u1ebf v\u00e0 khoa h\u1ecdc v\u1eadt li\u1ec7u. M\u1eb7c d\u00f9 piezoceramic c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m nh\u01b0 k\u00edch th\u01b0\u1edbc nh\u1ecf<\/p>\n","protected":false},"author":1,"featured_media":587,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-55498","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\/55498","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=55498"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/55498\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/587"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=55498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=55498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=55498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}