{"id":57276,"date":"2023-04-25T14:43:59","date_gmt":"2023-04-25T19:43:59","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-the-best-piezoelectric-material\/"},"modified":"2025-01-27T06:17:24","modified_gmt":"2025-01-27T11:17:24","slug":"what-is-the-best-piezoelectric-material","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/what-is-the-best-piezoelectric-material\/","title":{"rendered":"Nejlep\u0161\u00ed piezoelektrick\u00fd materi\u00e1l: Kompletn\u00ed pr\u016fvodce"},"content":{"rendered":"<p>Nejlep\u0161\u00ed piezoelektrick\u00fd materi\u00e1l je ot\u00e1zka bez jednozna\u010dn\u00e9 odpov\u011bdi, jeliko\u017e optim\u00e1ln\u00ed volba z\u00e1vis\u00ed na specifick\u00e9 aplikaci.  R\u016fzn\u00e9 materi\u00e1ly vykazuj\u00ed r\u016fzn\u00e9 vlastnosti, jako je piezoelektrick\u00fd koeficient, mechanick\u00e1 pevnost, Curieova teplota a dielektrick\u00e1 konstanta.  V\u00fdb\u011br spr\u00e1vn\u00e9ho materi\u00e1lu je proto kompromisem mezi po\u017eadovan\u00fdmi vlastnostmi a omezen\u00edmi dan\u00e9 aplikace.<\/p>\n<p>Piezoelektrick\u00fd koeficient a jeho v\u00fdznam<\/p>\n<p>Piezoelektrick\u00fd koeficient ud\u00e1v\u00e1, jak efektivn\u011b materi\u00e1l p\u0159ev\u00e1d\u00ed mechanickou energii na energii elektrickou a naopak.  Vy\u0161\u0161\u00ed koeficient obecn\u011b znamen\u00e1 lep\u0161\u00ed v\u00fdkon.  Mnoho materi\u00e1l\u016f vykazuje v\u00fdznamn\u00fd piezoelektrick\u00fd efekt, ale jejich vhodnost pro konkr\u00e9tn\u00ed pou\u017eit\u00ed se li\u0161\u00ed.  Nap\u0159\u00edklad pro generov\u00e1n\u00ed vysok\u00e9ho nap\u011bt\u00ed jsou vhodn\u00e9 materi\u00e1ly s vysok\u00fdm koeficientem, zat\u00edmco pro aplikace vy\u017eaduj\u00edc\u00ed vysokou mechanickou odolnost jsou kl\u00ed\u010dov\u00e9 jin\u00e9 vlastnosti.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Materi\u00e1l<\/th>\n<th>Piezoelektrick\u00fd koeficient (pC\/N)<\/th>\n<th>Curieova teplota (\u00b0C)<\/th>\n<th>Mechanick\u00e1 pevnost<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>K\u0159emen (SiO2)<\/td>\n<td>2.3<\/td>\n<td>573<\/td>\n<td>Vysok\u00e1<\/td>\n<\/tr>\n<tr>\n<td>PZT (Pb(Zr,Ti)O3)<\/td>\n<td>150-700<\/td>\n<td>300-350<\/td>\n<td>St\u0159edn\u00ed<\/td>\n<\/tr>\n<tr>\n<td>BaTiO3<\/td>\n<td>190<\/td>\n<td>120<\/td>\n<td>St\u0159edn\u00ed<\/td>\n<\/tr>\n<tr>\n<td>ZnO<\/td>\n<td>10-100<\/td>\n<td>200-250<\/td>\n<td>St\u0159edn\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Vliv Curieovy teploty<\/p>\n<p>Curieova teplota je kritick\u00e1 teplota, nad kterou materi\u00e1l ztr\u00e1c\u00ed sv\u00e9 piezoelektrick\u00e9 vlastnosti.  Pro aplikace v extr\u00e9mn\u00edch teplot\u00e1ch je nutn\u00e9 zvolit materi\u00e1l s vysokou Curieovou teplotou.  K\u0159emen nap\u0159\u00edklad m\u00e1 vysokou Curieovu teplotu, co\u017e z n\u011bj \u010din\u00ed vhodn\u00fd materi\u00e1l pro aplikace v vysok\u00fdch teplot\u00e1ch, av\u0161ak jeho piezoelektrick\u00fd koeficient je relativn\u011b n\u00edzk\u00fd.<\/p>\n<p>Mechanick\u00e1 pevnost a dal\u0161\u00ed faktory<\/p>\n<p>Krom\u011b piezoelektrick\u00e9ho koeficientu a Curieovy teploty je t\u0159eba zv\u00e1\u017eit i dal\u0161\u00ed faktory, jako je mechanick\u00e1 pevnost, dielektrick\u00e1 konstanta a hustota materi\u00e1lu.  N\u011bkter\u00e9 materi\u00e1ly jsou k\u0159ehk\u00e9 a n\u00e1chyln\u00e9 k po\u0161kozen\u00ed, zat\u00edmco jin\u00e9 vykazuj\u00ed vysokou mechanickou odolnost.  Volba materi\u00e1lu z\u00e1vis\u00ed na po\u017eadavc\u00edch aplikace a okoln\u00edch podm\u00ednk\u00e1ch.  Nap\u0159\u00edklad pro aplikace s vysokou frekvenc\u00ed, jako jsou n\u011bkter\u00e9 ultrazvukov\u00e9 senzory (nap\u0159. od Beijing Ultrasonic), je kl\u00ed\u010dov\u00e1 vysok\u00e1 rezonan\u010dn\u00ed frekvence, kter\u00e1 souvis\u00ed s rozm\u011bry a vlastnostmi materi\u00e1lu.<\/p>\n<p>Z\u00e1v\u011br<\/p>\n<p>Neexistuje jeden &quot;nejlep\u0161\u00ed&quot; piezoelektrick\u00fd materi\u00e1l.  Optim\u00e1ln\u00ed volba z\u00e1vis\u00ed na specifick\u00fdch po\u017eadavc\u00edch aplikace, jako jsou po\u017eadovan\u00fd piezoelektrick\u00fd koeficient, Curieova teplota, mechanick\u00e1 pevnost a dal\u0161\u00ed vlastnosti.  D\u016fkladn\u00e1 anal\u00fdza t\u011bchto faktor\u016f je nezbytn\u00e1 pro v\u00fdb\u011br materi\u00e1lu, kter\u00fd spln\u00ed v\u0161echny po\u017eadavky a zajist\u00ed optim\u00e1ln\u00ed v\u00fdkon.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nejlep\u0161\u00ed piezoelektrick\u00fd materi\u00e1l je ot\u00e1zka bez jednozna\u010dn\u00e9 odpov\u011bdi, jeliko\u017e optim\u00e1ln\u00ed volba z\u00e1vis\u00ed na specifick\u00e9 aplikaci. R\u016fzn\u00e9 materi\u00e1ly vykazuj\u00ed r\u016fzn\u00e9 vlastnosti, jako je piezoelektrick\u00fd koeficient, mechanick\u00e1 pevnost, Curieova teplota a dielektrick\u00e1 konstanta. V\u00fdb\u011br spr\u00e1vn\u00e9ho materi\u00e1lu je proto kompromisem mezi po\u017eadovan\u00fdmi vlastnostmi a omezen\u00edmi dan\u00e9 aplikace. Piezoelektrick\u00fd koeficient a jeho v\u00fdznam Piezoelektrick\u00fd koeficient ud\u00e1v\u00e1, jak efektivn\u011b materi\u00e1l<\/p>\n","protected":false},"author":1,"featured_media":23771,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-57276","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/57276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/comments?post=57276"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/57276\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/23771"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=57276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=57276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=57276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}