{"id":62791,"date":"2022-09-26T18:29:04","date_gmt":"2022-09-26T23:29:04","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/is-there-any-truth-to-piezoceramic-sheets-being-really-fragile\/"},"modified":"2025-01-27T06:14:40","modified_gmt":"2025-01-27T11:14:40","slug":"is-there-any-truth-to-piezoceramic-sheets-being-really-fragile","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/is-there-any-truth-to-piezoceramic-sheets-being-really-fragile\/","title":{"rendered":"K\u0159ehkost piezoelektrick\u00fdch f\u00f3li\u00ed: m\u00fdtus \u010di realita?"},"content":{"rendered":"<p>Piezoelektrick\u00e9 folie jsou v mnoha aplikac\u00edch, od senzor\u016f a\u017e po aktu\u00e1tory, st\u00e1le popul\u00e1rn\u011bj\u0161\u00ed.  Nicm\u00e9n\u011b, \u010dast\u00fdm t\u00e9matem diskuze je jejich k\u0159ehkost.  Je tato obava opr\u00e1vn\u011bn\u00e1?  Pod\u00edvejme se bl\u00ed\u017ee na vlastnosti t\u011bchto materi\u00e1l\u016f a na to, co skute\u010dn\u011b znamen\u00e1 jejich &quot;k\u0159ehkost&quot;.<\/p>\n<h3>Mechanick\u00e9 vlastnosti piezoelektrick\u00fdch foli\u00ed<\/h3>\n<p>Piezoelektrick\u00e9 folie, typicky vyroben\u00e9 z materi\u00e1lu jako je PZT (olov\u011bnato-zirkonatan-titani\u010dit\u00fd), vykazuj\u00ed vysokou pevnost v tlaku, ale relativn\u011b n\u00edzkou pevnost v tahu a ohybu.  To je kl\u00ed\u010dov\u00fd faktor, kter\u00fd p\u0159isp\u00edv\u00e1 k vn\u00edm\u00e1n\u00ed jejich k\u0159ehkosti.  Jednodu\u0161e \u0159e\u010deno, snadn\u011bji se zlom\u00ed, kdy\u017e jsou natahov\u00e1ny nebo oh\u00fdb\u00e1ny, ne\u017e kdy\u017e jsou stla\u010deny.  Tato vlastnost je inherentn\u00ed jejich krystalick\u00e9 struktu\u0159e a nelze ji zcela odstranit.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Vlastnost<\/th>\n<th>Typick\u00e1 hodnota<\/th>\n<th>Pozn\u00e1mka<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Pevnost v tlaku<\/td>\n<td>100 &#8211; 200 MPa<\/td>\n<td>Z\u00e1vis\u00ed na konkr\u00e9tn\u00edm slo\u017een\u00ed a v\u00fdrobn\u00edm procesu<\/td>\n<\/tr>\n<tr>\n<td>Pevnost v tahu<\/td>\n<td>20 &#8211; 60 MPa<\/td>\n<td>Podstatn\u011b ni\u017e\u0161\u00ed ne\u017e pevnost v tlaku<\/td>\n<\/tr>\n<tr>\n<td>Modul pru\u017enosti<\/td>\n<td>60 &#8211; 80 GPa<\/td>\n<td>Vy\u0161\u0161\u00ed hodnota indikuje v\u011bt\u0161\u00ed tuhost<\/td>\n<\/tr>\n<tr>\n<td>Tvrdost<\/td>\n<td>5 &#8211; 7 Mohs<\/td>\n<td>Relativn\u00ed m\u011b\u0159\u00edtko odolnosti proti po\u0161kr\u00e1b\u00e1n\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Faktory ovliv\u0148uj\u00edc\u00ed k\u0159ehkost<\/h3>\n<p>Krom\u011b inherentn\u00edch materi\u00e1lov\u00fdch vlastnost\u00ed existuj\u00ed i dal\u0161\u00ed faktory, kter\u00e9 ovliv\u0148uj\u00ed vn\u00edmanou k\u0159ehkost piezoelektrick\u00fdch foli\u00ed.  Nap\u0159\u00edklad zp\u016fsob v\u00fdroby a manipulace s nimi hraje d\u016fle\u017eitou roli.  Nedostate\u010dn\u00e1 ochrana b\u011bhem p\u0159epravy a instalace m\u016f\u017ee v\u00e9st k po\u0161kozen\u00ed.  D\u00e1le, existuj\u00ed rozd\u00edly v kvalit\u011b materi\u00e1l\u016f od r\u016fzn\u00fdch v\u00fdrobc\u016f.  N\u011bkter\u00e9 folie jsou navr\u017eeny pro robustn\u011bj\u0161\u00ed aplikace a vykazuj\u00ed vy\u0161\u0161\u00ed odolnost proti mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed.<\/p>\n<h3>Spr\u00e1vn\u00e1 manipulace a aplikace<\/h3>\n<p>Aby se minimalizovalo riziko po\u0161kozen\u00ed, je nutn\u00e9 dodr\u017eovat doporu\u010den\u00ed v\u00fdrobce ohledn\u011b manipulace a instalace.  To zahrnuje opatrn\u00e9 zach\u00e1zen\u00ed, pou\u017eit\u00ed vhodn\u00fdch podp\u011br a minimalizaci nap\u011bt\u00ed b\u011bhem mont\u00e1\u017ee.  V n\u011bkter\u00fdch p\u0159\u00edpadech je vhodn\u00e9 pou\u017e\u00edt ochrann\u00e9 vrstvy nebo kompozitn\u00ed materi\u00e1ly, kter\u00e9 zv\u00fd\u0161\u00ed odolnost folie proti po\u0161kozen\u00ed.  Pou\u017eit\u00ed vhodn\u00fdch lepidel je tak\u00e9 kl\u00ed\u010dov\u00e9 pro zaji\u0161t\u011bn\u00ed spr\u00e1vn\u00e9 fixace bez zbyte\u010dn\u00e9ho nap\u011bt\u00ed.<\/p>\n<h3>Aplikace vy\u017eaduj\u00edc\u00ed robustn\u011bj\u0161\u00ed \u0159e\u0161en\u00ed<\/h3>\n<p>V aplikac\u00edch, kde je vy\u017eadov\u00e1na vy\u0161\u0161\u00ed odolnost, se \u010dasto pou\u017e\u00edvaj\u00ed zes\u00edlen\u00e9 konstrukce nebo se vol\u00ed alternativy s lep\u0161\u00edmi mechanick\u00fdmi vlastnostmi.  N\u011bkter\u00e9 aplikace, nap\u0159\u00edklad v ultrazvukov\u00fdch za\u0159\u00edzen\u00edch, mohou vy\u017eadovat pou\u017eit\u00ed kompozitn\u00edch materi\u00e1l\u016f, kter\u00e9 kombinuj\u00ed v\u00fdhody piezoelektrick\u00fdch foli\u00ed s odolnost\u00ed jin\u00fdch materi\u00e1l\u016f.  V takov\u00fdch p\u0159\u00edpadech m\u016f\u017ee b\u00fdt d\u016fle\u017eit\u00e1 spolupr\u00e1ce s dodavateli, jako je nap\u0159\u00edklad Beijing Ultrasonic, pro v\u00fdb\u011br vhodn\u00e9ho \u0159e\u0161en\u00ed.<\/p>\n<p>Z\u00e1v\u011brem, tvrzen\u00ed o k\u0159ehkosti piezoelektrick\u00fdch foli\u00ed je \u010d\u00e1ste\u010dn\u011b pravdiv\u00e9.  Jejich n\u00edzk\u00e1 pevnost v tahu a ohybu je inherentn\u00ed vlastnost\u00ed materi\u00e1lu.  Nicm\u00e9n\u011b, spr\u00e1vn\u00e1 manipulace, v\u00fdb\u011br vhodn\u00e9ho materi\u00e1lu a konstruk\u010dn\u00ed \u0159e\u0161en\u00ed mohou minimalizovat riziko po\u0161kozen\u00ed a umo\u017enit jejich \u00fasp\u011b\u0161n\u00e9 pou\u017eit\u00ed v \u0161irok\u00e9m spektru aplikac\u00ed.  D\u016fle\u017eit\u00e9 je si uv\u011bdomit, \u017ee k\u0159ehkost nen\u00ed absolutn\u00ed vlastnost, ale z\u00e1le\u017e\u00ed na konkr\u00e9tn\u00edch podm\u00ednk\u00e1ch a aplikaci.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Piezoelektrick\u00e9 folie jsou v mnoha aplikac\u00edch, od senzor\u016f a\u017e po aktu\u00e1tory, st\u00e1le popul\u00e1rn\u011bj\u0161\u00ed. Nicm\u00e9n\u011b, \u010dast\u00fdm t\u00e9matem diskuze je jejich k\u0159ehkost. Je tato obava opr\u00e1vn\u011bn\u00e1? Pod\u00edvejme se bl\u00ed\u017ee na vlastnosti t\u011bchto materi\u00e1l\u016f a na to, co skute\u010dn\u011b znamen\u00e1 jejich &quot;k\u0159ehkost&quot;. Mechanick\u00e9 vlastnosti piezoelektrick\u00fdch foli\u00ed Piezoelektrick\u00e9 folie, typicky vyroben\u00e9 z materi\u00e1lu jako je PZT (olov\u011bnato-zirkonatan-titani\u010dit\u00fd), vykazuj\u00ed vysokou<\/p>\n","protected":false},"author":1,"featured_media":4869,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-62791","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\/62791","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=62791"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62791\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/4869"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=62791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=62791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=62791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}