{"id":59237,"date":"2023-04-22T00:03:50","date_gmt":"2023-04-22T05:03:50","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-make-piezoelectric-transducer\/"},"modified":"2025-01-27T06:11:21","modified_gmt":"2025-01-27T11:11:21","slug":"how-to-make-piezoelectric-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-make-piezoelectric-transducer\/","title":{"rendered":"V\u00fdroba piezoelektrick\u00e9ho sn\u00edma\u010de: Praktick\u00fd n\u00e1vod"},"content":{"rendered":"<p>Piezoelektrick\u00e9 transduc\u00e9ry jsou fascinuj\u00edc\u00ed za\u0159\u00edzen\u00ed, kter\u00e1 dok\u00e1\u017e\u00ed p\u0159ev\u00e1d\u011bt mechanickou energii na elektrickou a naopak.  Tento proces je zalo\u017een na piezoelektrick\u00e9m efektu, objeven\u00e9m v roce 1880 bratry Curie.  V\u00fdroba t\u011bchto transduktor\u016f, a\u0165 u\u017e pro ultrazvukov\u00e9 aplikace nebo jin\u00e9 \u00fa\u010dely, je komplexn\u00ed proces zahrnuj\u00edc\u00ed pe\u010dliv\u00fd v\u00fdb\u011br materi\u00e1l\u016f a precizn\u00ed v\u00fdrobn\u00ed techniky. Tento \u010dl\u00e1nek podrobn\u011b prozkoum\u00e1 r\u016fzn\u00e9 aspekty v\u00fdroby piezoelektrick\u00fdch transduktor\u016f.<\/p>\n<p>V\u00fdb\u011br piezoelektrick\u00e9ho materi\u00e1lu<\/p>\n<p>Nejd\u016fle\u017eit\u011bj\u0161\u00ed sou\u010d\u00e1st\u00ed piezoelektrick\u00e9ho transduktoru je samotn\u00fd piezoelektrick\u00fd materi\u00e1l.  Jeho vlastnosti, jako je piezoelektrick\u00fd koeficient, dielektrick\u00e1 konstanta a mechanick\u00e1 pevnost, v\u00fdznamn\u011b ovliv\u0148uj\u00ed v\u00fdkon transduktoru.  Mezi nej\u010dast\u011bji pou\u017e\u00edvan\u00e9 materi\u00e1ly pat\u0159\u00ed keramika na b\u00e1zi olovnat\u00e9ho zirkonitanu titani\u010dit\u00e9ho (PZT), kter\u00e1 vykazuje vysok\u00fd piezoelektrick\u00fd koeficient a dobrou mechanickou stabilitu.  Dal\u0161\u00edmi mo\u017enostmi jsou nap\u0159\u00edklad kvarc, turmal\u00edn nebo n\u011bkter\u00e9 polymern\u00ed materi\u00e1ly, ale tyto materi\u00e1ly \u010dasto vykazuj\u00ed ni\u017e\u0161\u00ed \u00fa\u010dinnost.<\/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>Dielektrick\u00e1 konstanta<\/th>\n<th>Mechanick\u00e1 pevnost<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>PZT<\/td>\n<td>200 &#8211; 700<\/td>\n<td>1000 &#8211; 4000<\/td>\n<td>Vysok\u00e1<\/td>\n<\/tr>\n<tr>\n<td>Kvarc<\/td>\n<td>2 &#8211; 3<\/td>\n<td>4 &#8211; 7<\/td>\n<td>Vysok\u00e1<\/td>\n<\/tr>\n<tr>\n<td>Turmal\u00edn<\/td>\n<td>1 &#8211; 10<\/td>\n<td>5 &#8211; 8<\/td>\n<td>St\u0159edn\u00ed<\/td>\n<\/tr>\n<tr>\n<td>PVDF (polymer)<\/td>\n<td>10 &#8211; 30<\/td>\n<td>10 &#8211; 12<\/td>\n<td>N\u00edzk\u00e1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>P\u0159\u00edprava materi\u00e1lu a tvarov\u00e1n\u00ed<\/p>\n<p>Po v\u00fdb\u011bru vhodn\u00e9ho materi\u00e1lu je nutn\u00e9 jej p\u0159ipravit pro tvarov\u00e1n\u00ed.  To zahrnuje procesy jako mlet\u00ed, m\u00edch\u00e1n\u00ed s pojivy a lisov\u00e1n\u00ed do po\u017eadovan\u00e9ho tvaru.  Pro v\u00fdrobu komplexn\u00edch tvar\u016f se \u010dasto pou\u017e\u00edv\u00e1 technologie pr\u00e1\u0161kov\u00e9ho metalurgie nebo metoda tape casting.  U n\u011bkter\u00fdch aplikac\u00ed, nap\u0159\u00edklad u piezoelektrick\u00fdch film\u016f, se pou\u017e\u00edvaj\u00ed tenkovrstv\u00e9 technologie jako sputtering nebo sol-gel procesy.  Kvalita p\u0159\u00edpravy materi\u00e1lu siln\u011b ovliv\u0148uje kone\u010dn\u00e9 vlastnosti transduktoru.<\/p>\n<p>Polarizace a metalizace<\/p>\n<p>Kl\u00ed\u010dov\u00fdm krokem v procesu v\u00fdroby je polarizace piezoelektrick\u00e9ho materi\u00e1lu.  To se prov\u00e1d\u00ed aplikac\u00ed siln\u00e9ho elektrick\u00e9ho pole p\u0159i vysok\u00e9 teplot\u011b, kter\u00e1 uspo\u0159\u00e1d\u00e1 dip\u00f3ly v materi\u00e1lu a tak indukuje piezoelektrick\u00fd efekt.  Po polarizaci se na povrch materi\u00e1lu nan\u00e1\u0161\u00ed kovov\u00e9 elektrody, obvykle pomoc\u00ed napa\u0159ov\u00e1n\u00ed nebo st\u0159\u00edk\u00e1n\u00ed.  Elektrody zaji\u0161\u0165uj\u00ed elektrick\u00e9 p\u0159ipojen\u00ed k transduktoru a ovliv\u0148uj\u00ed jeho impedanci.<\/p>\n<p>Zkompletov\u00e1n\u00ed a testov\u00e1n\u00ed<\/p>\n<p>Po metalizaci se piezoelektrick\u00fd element montuje do kone\u010dn\u00e9ho pouzdra, \u010dasto s dal\u0161\u00edmi komponentami jako jsou akustick\u00e9 impedance-lad\u00edc\u00ed vrstvy, ochrann\u00e9 kryty nebo mechanick\u00e9 upevn\u011bn\u00ed.  Kone\u010dn\u00fd transduktor se d\u016fkladn\u011b testuje na jeho frekven\u010dn\u00ed odezvu, citlivost a dal\u0161\u00ed parametry.  P\u0159esn\u00e1 kontrola t\u011bchto parametr\u016f je nezbytn\u00e1 pro zaji\u0161t\u011bn\u00ed kvality a spolehlivosti transduktoru.  V n\u011bkter\u00fdch p\u0159\u00edpadech, zejm\u00e9na u ultrazvukov\u00fdch aplikac\u00ed, je d\u016fle\u017eit\u00e9 kalibrovat transduktor s pomoc\u00ed speci\u00e1ln\u00edho vybaven\u00ed.<\/p>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee v\u00fdroba piezoelektrick\u00fdch transduktor\u016f je sofistikovan\u00fd proces, kter\u00fd vy\u017eaduje hlubok\u00e9 znalosti materi\u00e1lov\u00fdch v\u011bd a v\u00fdrobn\u00edch technologi\u00ed.  P\u0159esn\u00fd v\u00fdb\u011br materi\u00e1lu, pe\u010dliv\u00e1 p\u0159\u00edprava a precizn\u00ed zpracov\u00e1n\u00ed jsou kl\u00ed\u010dov\u00e9 pro dosa\u017een\u00ed po\u017eadovan\u00fdch vlastnost\u00ed a vysok\u00e9 kvality kone\u010dn\u00e9ho produktu.  Rozmanitost aplikac\u00ed piezoelektrick\u00fdch transduktor\u016f od ultrazvukov\u00e9ho zobrazov\u00e1n\u00ed po senzory s\u00edly sv\u011bd\u010d\u00ed o jejich v\u00fdznamu v modern\u00ed technologii.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Piezoelektrick\u00e9 transduc\u00e9ry jsou fascinuj\u00edc\u00ed za\u0159\u00edzen\u00ed, kter\u00e1 dok\u00e1\u017e\u00ed p\u0159ev\u00e1d\u011bt mechanickou energii na elektrickou a naopak. Tento proces je zalo\u017een na piezoelektrick\u00e9m efektu, objeven\u00e9m v roce 1880 bratry Curie. V\u00fdroba t\u011bchto transduktor\u016f, a\u0165 u\u017e pro ultrazvukov\u00e9 aplikace nebo jin\u00e9 \u00fa\u010dely, je komplexn\u00ed proces zahrnuj\u00edc\u00ed pe\u010dliv\u00fd v\u00fdb\u011br materi\u00e1l\u016f a precizn\u00ed v\u00fdrobn\u00ed techniky. Tento \u010dl\u00e1nek podrobn\u011b prozkoum\u00e1 r\u016fzn\u00e9 aspekty<\/p>\n","protected":false},"author":1,"featured_media":19409,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-59237","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\/59237","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=59237"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/59237\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19409"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=59237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=59237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=59237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}