{"id":1854,"date":"2025-08-11T02:39:46","date_gmt":"2025-08-11T02:39:46","guid":{"rendered":"https:\/\/nbaem.com\/?p=1854"},"modified":"2025-08-11T04:00:49","modified_gmt":"2025-08-11T04:00:49","slug":"which-magnets-can-withstand-high-temperatures","status":"publish","type":"post","link":"https:\/\/nbaem.com\/cs\/which-magnets-can-withstand-high-temperatures\/","title":{"rendered":"Pr\u016fvodce, kter\u00e9 magnety vydr\u017e\u00ed vysok\u00e9 teploty"},"content":{"rendered":"<p>Zaj\u00edm\u00e1 v\u00e1s <strong>kter\u00e9 magnety vydr\u017e\u00ed vysok\u00e9 teploty<\/strong> ani\u017e by ztratily svou s\u00edlu? Pokud pracujete s aplikacemi, kde je teplo hlavn\u00edm faktorem\u2014a\u0165 u\u017e v automobilov\u00fdch senzorech, leteck\u00fdch \u0159\u00edzen\u00edch nebo pr\u016fmyslov\u00fdch stroj\u00edch\u2014je v\u00fdb\u011br spr\u00e1vn\u00e9ho <strong>magnet\u016f odoln\u00fdch v\u016f\u010di vysok\u00fdm teplot\u00e1m<\/strong> naprosto kl\u00ed\u010dov\u00fd. Ne v\u0161echny magnety se chovaj\u00ed stejn\u011b p\u0159i zv\u00fd\u0161en\u00ed teploty, a v\u00fdb\u011br \u0161patn\u00e9ho m\u016f\u017ee v\u00e9st k magnetick\u00e9mu selh\u00e1n\u00ed a n\u00e1kladn\u00fdm prostoj\u016fm.<\/p>\n<p>V tomto pr\u016fvodci objev\u00edte rozd\u00edly mezi obl\u00edben\u00fdmi magnety, kter\u00e9 dob\u0159e zvl\u00e1daj\u00ed teplo, nau\u010d\u00edte se, co skute\u010dn\u011b znamenaj\u00ed teplotn\u00ed limity, a z\u00edsk\u00e1te odborn\u00e9 tipy, jak naj\u00edt ide\u00e1ln\u00ed <strong>teplotn\u011b odoln\u00e9 magnetick\u00e9 materi\u00e1ly<\/strong> pro va\u0161e nejn\u00e1ro\u010dn\u011bj\u0161\u00ed prost\u0159ed\u00ed. Nav\u00edc v\u00e1m uk\u00e1\u017eeme, jak NBAEM poskytuje spolehliv\u00e1, na m\u00edru \u0161it\u00e1 \u0159e\u0161en\u00ed, kter\u00e1 udr\u017e\u00ed va\u0161e projekty v chodu i pod tlakem.<\/p>\n<p>Poj\u010fme za\u010d\u00edt!<\/p>\n<h2>Kter\u00e9 magnety vydr\u017e\u00ed vysok\u00e9 teploty<\/h2>\n<h3>Porozum\u011bn\u00ed limit\u016fm teploty magnet\u016f<\/h3>\n<p>Za\u010d\u00edn\u00e1m odd\u011blen\u00edm dvou kl\u00ed\u010dov\u00fdch teplot, kter\u00e9 uvid\u00edte v technick\u00fdch listech, abyste si mohli vybrat spr\u00e1vn\u00e9 odoln\u00e9 magnetick\u00e9 materi\u00e1ly.<\/p>\n<ul>\n<li><strong>teplotu Curie<\/strong> \u2014 to je z\u00e1kladn\u00ed bod, kdy magnet ztr\u00e1c\u00ed sv\u00e9 trval\u00e9 magnetick\u00e9 vlastnosti a st\u00e1v\u00e1 se paramagnetick\u00fdm. Nad teplotou Curie se z\u00e1kladn\u00ed magnetick\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed rozpad\u00e1. V mnoha p\u0159\u00edpadech p\u0159ekro\u010den\u00ed teploty Curie zp\u016fsob\u00ed <strong>trval\u00fd<\/strong> po\u0161kozen\u00ed, proto\u017ee se m\u016f\u017ee zm\u011bnit mikrostruktura a vlastnosti materi\u00e1lu.<\/li>\n<li><strong>Maxim\u00e1ln\u00ed provozn\u00ed teplota<\/strong> \u2014 to je bezpe\u010dn\u00fd pracovn\u00ed limit, kter\u00fd v\u00fdrobci uv\u00e1d\u011bj\u00ed. Je v\u00fdrazn\u011b pod teplotou Curie a ud\u00e1v\u00e1, kde magnet udr\u017e\u00ed p\u0159ijatelnou magnetickou s\u00edlu b\u011bhem norm\u00e1ln\u00edho pou\u017e\u00edv\u00e1n\u00ed. Udr\u017eov\u00e1n\u00ed p\u0159i nebo pod touto teplotou obvykle zaji\u0161\u0165uje <strong>reverzibiln\u00ed<\/strong> ztr\u00e1tu magnetismu: pole zesl\u00e1bne p\u0159i vysok\u00e9 teplot\u011b, ale obnov\u00ed se p\u0159i ochlazen\u00ed.<\/li>\n<\/ul>\n<p>Reverzibiln\u00ed versus ireverzibiln\u00ed ztr\u00e1ta<\/p>\n<ul>\n<li>Reverzibiln\u00ed ztr\u00e1ta: kr\u00e1tkodob\u00fd pokles toku nebo Br p\u0159i zv\u00fd\u0161en\u00e9 teplot\u011b, kter\u00fd se vr\u00e1t\u00ed p\u0159i ochlazen\u00ed magnetu. Obvykl\u00e9 p\u0159i udr\u017eov\u00e1n\u00ed pod maxim\u00e1ln\u00ed provozn\u00ed teplotou.<\/li>\n<li>Ireverzibiln\u00ed ztr\u00e1ta: trval\u00e9 sn\u00ed\u017een\u00ed magnetizace zp\u016fsoben\u00e9 p\u0159ekro\u010den\u00edm maxim\u00e1ln\u00ed provozn\u00ed teploty, opakovan\u00fdm tepeln\u00fdm cyklov\u00e1n\u00edm, p\u0159eh\u0159\u00e1t\u00edm bl\u00edzko teploty Curie nebo oxidac\u00ed a struktur\u00e1ln\u00edmi zm\u011bnami.<\/li>\n<\/ul>\n<p>Pro\u010d jsou teplotn\u00ed hodnoty d\u016fle\u017eit\u00e9 pro v\u00fdkon a \u017eivotnost<\/p>\n<ul>\n<li>Zv\u00fd\u0161en\u00e1 teplota sni\u017euje magnetickou s\u00edlu (Br a energick\u00fd sou\u010din), co\u017e m\u016f\u017ee ovlivnit to\u010div\u00fd moment, p\u0159esnost senzor\u016f, s\u00edlu dr\u017een\u00ed a \u00fa\u010dinnost motoru.<\/li>\n<li>Tepeln\u00e9 cykly urychluj\u00ed <strong>ireverzibiln\u00ed<\/strong> degeneraci i p\u0159i<\/li>\n<\/ul>\n<h2>Kter\u00e9 magnety mohou vydr\u017eet vysok\u00e9 teploty<\/h2>\n<h3>B\u011b\u017en\u00e9 typy magnet\u016f odoln\u00fdch v\u016f\u010di vysok\u00fdm teplot\u00e1m<\/h3>\n<p>Zde je rychl\u00fd, praktick\u00fd p\u0159ehled magnetu, kter\u00fd pou\u017e\u00edv\u00e1m nebo doporu\u010duji, kdy\u017e je teplo faktorem. Udr\u017euji to stru\u010dn\u00e9, abyste si mohli vybrat spr\u00e1vn\u00fd materi\u00e1l pro pr\u016fmyslov\u00e9, automobilov\u00e9 nebo dom\u00e1c\u00ed pot\u0159eby v \u010cesk\u00e9 republice.<\/p>\n<ul>\n<li>Magnety Alnico\n<ul>\n<li>Maxim\u00e1ln\u00ed provozn\u00ed teplota: asi 540\u00b0C (\u22481004\u00b0F)<\/li>\n<li>V\u00fdhody: velmi stabiln\u00ed tok p\u0159i vysok\u00fdch teplot\u00e1ch, vhodn\u00e9 pro senzory a termostaty.<\/li>\n<li>Slabosti: ni\u017e\u0161\u00ed magnetick\u00e1 energie ne\u017e vz\u00e1cn\u00e9 zeminy, k\u0159ehk\u00e9, m\u016f\u017ee b\u00fdt demagnetizov\u00e1no n\u00e1razem nebo vibracemi.<\/li>\n<li>Pou\u017e\u00edv\u00e1 se, kdy\u017e pot\u0159ebujete vysokou odolnost v\u016f\u010di teplot\u00e1m bez vysok\u00e9 ceny vz\u00e1cn\u00fdch prvk\u016f.<\/li>\n<\/ul>\n<\/li>\n<li>Magnety Samarium Cobalt (SmCo)\n<ul>\n<li>Provozn\u00ed rozsah: p\u0159ibli\u017en\u011b 250\u2013350\u00b0C (\u2248482\u2013662\u00b0F) v z\u00e1vislosti<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Kter\u00e9 magnety odol\u00e1vaj\u00ed vysok\u00fdm teplot\u00e1m<\/h2>\n<h3>Faktory ovliv\u0148uj\u00edc\u00ed v\u00fdkon magnetu p\u0159i vysok\u00fdch teplot\u00e1ch<\/h3>\n<p>Zjednodu\u0161\u00edm to: t\u0159i v\u011bci rozhoduj\u00ed, jak se magnet chov\u00e1 p\u0159i teplot\u011b \u2014 samotn\u00fd materi\u00e1l, fyzik\u00e1ln\u00ed a chemick\u00e9 po\u0161kozen\u00ed teplem a zp\u016fsob, jak\u00fdm je zah\u0159\u00edv\u00e1n a ochlazov\u00e1n.<\/p>\n<p>Slo\u017een\u00ed materi\u00e1lu a stabilita dom\u00e9n<\/p>\n<ul>\n<li>R\u016fzn\u00e9 materi\u00e1ly maj\u00ed r\u016fznou tepelnou odolnost. <strong>Vysok\u00e1 teplota<span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/cs\/products\/samarium-cobalt-magnets\/\" target=\"_blank\" rel=\"noopener\"> magnety samarium cobalt<\/a><\/span><\/strong> a <strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/cs\/products\/alnico-magnet\/\" target=\"_blank\" rel=\"noopener\">Magnety Alnico<\/a><\/span> teplotn\u00ed odolnost<\/strong> jsou mnohem lep\u0161\u00ed ne\u017e standardn\u00ed NdFeB.<\/li>\n<li>Hlavn\u00ed my\u0161lenka: magnety maj\u00ed mal\u00e9 zarovnan\u00e9 oblasti (magnetick\u00e9 dom\u00e9ny). Teplo tyto dom\u00e9ny rozh\u00fdb\u00e1v\u00e1. Pokud m\u00e1 materi\u00e1l silnou odolnost v\u016f\u010di tomuto rozh\u00fdb\u00e1v\u00e1n\u00ed (vysok\u00e1 koercivita), zachov\u00e1v\u00e1 si svou s\u00edlu.<\/li>\n<li>Sledujte <strong>teplotn\u00ed hodnocen\u00ed magnetu NdFeB<\/strong> \u2014 oby\u010dejn\u00fd NdFeB ztr\u00e1c\u00ed s\u00edlu rychleji s r\u016fstem teploty. Vy\u0161\u0161\u00ed t\u0159\u00eddy pom\u00e1haj\u00ed, ale st\u00e1le zaost\u00e1vaj\u00ed za SmCo a Alnico.<\/li>\n<\/ul>\n<p>Mechanick\u00fd stres, oxidace a koroze<\/p>\n<ul>\n<li>Teplo roz\u0161i\u0159uje \u010d\u00e1sti a m\u016f\u017ee zp\u016fsobit mechanick\u00fd stres nebo mikrotrhliny, kter\u00e9 sni\u017euj\u00ed magnetick\u00fd v\u00fdkon.<\/li>\n<li>Zv\u00fd\u0161en\u00e9 teploty urychluj\u00ed korozi a oxidaci \u2014 obzvl\u00e1\u0161\u0165 u NdFeB \u2014 co\u017e napad\u00e1 povrch magnetu a sni\u017euje magnetickou \u00fa\u010dinnost.<\/li>\n<li>Povrchov\u00e9 \u00fapravy a materi\u00e1ly odoln\u00e9 v\u016f\u010di korozi jsou d\u016fle\u017eit\u00e9. Nap\u0159\u00edklad SmCo m\u00e1 lep\u0161\u00ed <strong>odolnost v\u016f\u010di korozi a stabilitu<\/strong> ne\u017e mnoho t\u0159\u00edd NdFeB.<\/li>\n<\/ul>\n<p>Tepeln\u00e9 cykly a dlouhodob\u00e9 degradace<\/p>\n<ul>\n<li>Jednotliv\u00e1 hork\u00e1 ud\u00e1lost m\u016f\u017ee b\u00fdt v po\u0159\u00e1dku, ale opakovan\u00e9 oh\u0159\u00edv\u00e1n\u00ed a ochlazov\u00e1n\u00ed (tepeln\u00fd cyklus) \u010dasto zp\u016fsobuje kumulativn\u00ed, n\u011bkdy nevratnou ztr\u00e1tu.<\/li>\n<li>Cykly vytv\u00e1\u0159ej\u00ed nap\u011bt\u00ed, mikrotrhliny a postupn\u00e9 p\u0159izp\u016fsoben\u00ed nebo demagnetizaci dom\u00e9n. I kdy\u017e se maxim\u00e1ln\u00ed provozn\u00ed teplota magnetu zd\u00e1 b\u00fdt bezpe\u010dn\u00e1, \u010dast\u00e9 cykly mohou st\u00e1le sni\u017eovat v\u00fdkon.<\/li>\n<li>Praktick\u00e9 tipy:\n<ul>\n<li>Umo\u017en\u011bte bezpe\u010dnostn\u00ed rezervu pod maxim\u00e1ln\u00ed jmenovitou teplotou.<\/li>\n<li>Vyberte <strong>teplotn\u011b odoln\u00e9 magnetick\u00e9 materi\u00e1ly<\/strong> kdy\u017e va\u0161e konstrukce podstupuje opakovan\u00e9 cykly.<\/li>\n<li>Pou\u017e\u00edvejte ochrann\u00e9 vrstvy a navrhujte tak, aby omezovaly mechanick\u00e9 nap\u011bt\u00ed.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Toto jsou hlavn\u00ed skute\u010dnosti, kter\u00e9 stoj\u00ed za v\u00fdkonem magnet\u016f p\u0159i teple. Pokud stav\u00edte cokoli v \u010cesk\u00e9 republice, od motor\u016f po senzory v pec\u00edch nebo podkapotov\u00e9 komponenty, pl\u00e1nujte materi\u00e1ly, ochranu a cykly od za\u010d\u00e1tku.<\/p>\n<h2>Kter\u00e9 magnety mohou vydr\u017eet vysok\u00e9 teploty<\/h2>\n<h3>Aplikace vy\u017eaduj\u00edc\u00ed magnety s vysokou teplotn\u00ed odolnost\u00ed<\/h3>\n<p>Vn\u00edm\u00e1m tyto b\u011b\u017en\u00e9 p\u0159\u00edpady pou\u017eit\u00ed v \u010cesk\u00e9 republice, kde je d\u016fle\u017eit\u00e1 odolnost magnetick\u00fdch materi\u00e1l\u016f v\u016f\u010di teplu. Dr\u017e\u00edm to praktick\u00e9, abyste v\u011bd\u011bli, co vybrat pro ka\u017edou situaci.<\/p>\n<ul>\n<li>Automobilov\u00fd pr\u016fmysl\n<ul>\n<li><strong>Senzory podkapoty<\/strong>, HVAC pohony a <strong>motorov\u00e9 sou\u010d\u00e1sti<\/strong> v hybridn\u00edch a EV pohonech \u010del\u00ed trval\u00e9mu teplu. O\u010dek\u00e1vejte teploty od 120\u00b0C do 200\u00b0C v n\u011bkter\u00fdch z\u00f3n\u00e1ch\u2014vyberte <strong>magnety s vysokou teplotn\u00ed odolnost\u00ed na samarium-kobalt<\/strong> or <strong>Alnico magnety s teplotn\u00ed odolnost\u00ed<\/strong> t\u0159\u00eddy nad standardn\u00ed NdFeB.<\/li>\n<li>Prostory bl\u00edzko v\u00fdfuku nebo turba vy\u017eaduj\u00ed speci\u00e1ln\u00ed tepelnou a korozn\u00ed ochranu.<\/li>\n<\/ul>\n<\/li>\n<li>Leteck\u00fd pr\u016fmysl a obrana\n<ul>\n<li>Senzory \u0159\u00edzen\u00ed letu, pohony a instrumentace v hork\u00fdch prost\u0159ed\u00edch pot\u0159ebuj\u00ed stabiln\u00ed magnetick\u00fd v\u00fdkon za tepla a vibrac\u00ed. <strong>SmCo<\/strong> je b\u011b\u017en\u00fd pro sv\u00e9 <strong>magnetick\u00e9 vlastnosti p\u0159i vysok\u00e9 teplot\u011b<\/strong> a odolnost v\u016f\u010di korozi. Termick\u00e9 cykly a hmotnostn\u00ed omezen\u00ed jsou zde velmi d\u016fle\u017eit\u00e9.<\/li>\n<\/ul>\n<\/li>\n<li>Pr\u016fmyslov\u00e9 stroje\n<ul>\n<li>Elektrick\u00e9 motory, gener\u00e1tory a za\u0159\u00edzen\u00ed pro vysokoteplotn\u00ed zpracov\u00e1n\u00ed (pec, pece, linky na tepeln\u00e9 zpracov\u00e1n\u00ed) vy\u017eaduj\u00ed <strong>pr\u016fmyslov\u00e9 magnety odoln\u00e9 v\u016f\u010di teplu<\/strong>. Doporu\u010duji materi\u00e1ly s jasn\u00fdmi <strong>teplotn\u00edmi limity magnet\u016f<\/strong> a vysokou koercivitou pro odolnost v\u016f\u010di demagnetizaci p\u0159i tepeln\u00fdch \u0161pi\u010dk\u00e1ch.<\/li>\n<\/ul>\n<\/li>\n<li>Elektronika vystaven\u00e1 teplu\n<ul>\n<li>Senzory uvnit\u0159 pec\u00ed, komer\u010dn\u00ed kuchy\u0148sk\u00e9 za\u0159\u00edzen\u00ed a n\u011bkter\u00e9 spot\u0159ebi\u010de mus\u00ed sn\u00e9st opakovan\u00e9 zah\u0159\u00edv\u00e1n\u00ed. Pro opakovan\u00e9 cykly zvolte magnety s ozna\u010den\u00edm pro o\u010dek\u00e1van\u00fd vrchol a cykly \u2014<strong>teplotn\u00ed hodnocen\u00ed magnetu NdFeB<\/strong> je vhodn\u00e9 pro ni\u017e\u0161\u00ed teploty, ale vyhn\u011bte se pro trval\u00e9 &gt;150\u2013200\u00b0C.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Hlavn\u00ed rychl\u00e9 tipy<\/p>\n<ul>\n<li>Pro &gt;200\u00b0C: zva\u017ete <strong>samarium-kobaltov\u00e9<\/strong> or <strong>Alnico<\/strong>.<\/li>\n<li>Pro cenov\u011b citliv\u00e9, st\u0159edn\u00ed teploty: <strong>keramick\u00e9 ferritov\u00e9 magnety<\/strong> funguj\u00ed a\u017e do cca 250\u00b0C v nen\u00e1ro\u010dn\u00fdch aplikac\u00edch s pevnost\u00ed.<\/li>\n<li>Dbejte na tepeln\u00fd cyklus, oxidaci a mechanick\u00fd stres \u2014 v\u0161echny sni\u017euj\u00ed \u017eivotnost, i kdy\u017e se statick\u00e9 teplotn\u00ed hodnocen\u00ed magnetu zd\u00e1 b\u00fdt v po\u0159\u00e1dku.<\/li>\n<\/ul>\n<h2>Kter\u00e9 magnety odol\u00e1vaj\u00ed vysok\u00fdm teplot\u00e1m \u0159e\u0161en\u00ed NBAEM<\/h2>\n<p>Pom\u00e1h\u00e1me z\u00e1kazn\u00edk\u016fm z \u010cesk\u00e9 republiky vyb\u00edrat odoln\u00e9 magnetick\u00e9 materi\u00e1ly, kter\u00e9 skute\u010dn\u011b funguj\u00ed v praxi. N\u00ed\u017ee je jasn\u00fd p\u0159ehled na\u0161eho sortimentu, zak\u00e1zkov\u00fdch mo\u017enost\u00ed, kontrol kvality a re\u00e1ln\u00fdch p\u0159\u00edklad\u016f, abyste mohli sladit teplotn\u00ed limity s va\u0161\u00edm projektem.<\/p>\n<h3>Sortiment produkt\u016f a dostupn\u00e9 materi\u00e1ly<\/h3>\n<p>Skladem m\u00e1me a vyr\u00e1b\u00edme b\u011b\u017en\u00e9 magnety odoln\u00e9 v\u016f\u010di vysok\u00fdm teplot\u00e1m:<\/p>\n<ul>\n<li>Samarium-kobalt (Vysokotepeln\u00e9 samarium-kobaltov\u00e9 magnety) \u2014 stabiln\u00ed a odoln\u00e9 proti korozi a\u017e p\u0159ibli\u017en\u011b 250\u2013350\u00b0C. Nejlep\u0161\u00ed tam, kde mus\u00ed magnetick\u00fd v\u00fdkon z\u016fstat stabiln\u00ed.<\/li>\n<li>Alnico (Alnico magnety odoln\u00e9 v\u016f\u010di teplot\u00e1m) \u2014 zvl\u00e1daj\u00ed velmi vysok\u00e9 teploty (a\u017e p\u0159ibli\u017en\u011b 540\u00b0C), ale maj\u00ed ni\u017e\u0161\u00ed coercivitu; vhodn\u00e9 pro senzory a jednoduch\u00e9 motory.<\/li>\n<li>Vysokotepeln\u00e9 NdFeB (NdFeB magnety s teplotn\u00edm hodnocen\u00edm) \u2014 dostupn\u00e9 ve t\u0159\u00edd\u00e1ch s hodnocen\u00edm a\u017e p\u0159ibli\u017en\u011b 200\u00b0C pro kompaktn\u00ed vysokov\u00fdkonn\u00e9 pot\u0159eby; vyhn\u011bte se tam, kde teploty p\u0159ekra\u010duj\u00ed hodnocen\u00ed.<\/li>\n<li>Keramick\u00fd ferrit (keramick\u00e9 ferritov\u00e9 magnety) \u2014 cenov\u011b dostupn\u00e9, st\u0159edn\u00ed odolnost v\u016f\u010di teplu a\u017e p\u0159ibli\u017en\u011b 250\u00b0C.<\/li>\n<\/ul>\n<h3>Zak\u00e1zkov\u00e1 magnetick\u00e1 \u0159e\u0161en\u00ed pro va\u0161e prost\u0159ed\u00ed<\/h3>\n<p>Navrhujeme magnety tak, aby odpov\u00eddaly skute\u010dn\u00fdm provozn\u00edm podm\u00ednk\u00e1m:<\/p>\n<ul>\n<li>Uve\u010fte maxim\u00e1ln\u00ed provozn\u00ed teplotu, tepeln\u00e9 cykly a prost\u0159ed\u00ed (vlhkost, korozivn\u00ed l\u00e1tky).<\/li>\n<li>Vyberte materi\u00e1l, t\u0159\u00eddu a povrchovou \u00fapravu (nikl, epoxid, speci\u00e1ln\u00ed povrchov\u00e9 pokovov\u00e1n\u00ed) pro odolnost v\u016f\u010di oxidaci a korozi.<\/li>\n<li>Poskytujeme vlastn\u00ed tvary, velikosti a sestavy pro t\u011bsn\u00e9 geometrie v motorech, senzorech nebo pec\u00edch.<\/li>\n<li>Nab\u00edz\u00edme prototypy a vzorkov\u00e9 s\u00e9rie, abyste mohli ov\u011b\u0159it v\u00fdkon p\u0159ed plnou v\u00fdrobou.<\/li>\n<\/ul>\n<h3>Kontrola kvality zam\u011b\u0159en\u00e1 na tepelnou spolehlivost<\/h3>\n<p>Testujeme dlouhodob\u00fd magnetick\u00fd v\u00fdkon p\u0159i teplot\u011b:<\/p>\n<ul>\n<li>Testy tepeln\u00e9ho cyklu a kontrola stability p\u0159i zv\u00fd\u0161en\u00e9 teplot\u011b.<\/li>\n<li>M\u011b\u0159en\u00ed toku p\u0159i teplot\u011b a po ochlazen\u00ed pro detekci reverzibiln\u00edch vs. ireverzibiln\u00edch ztr\u00e1t \u2014 Testov\u00e1n\u00ed mechanick\u00e9ho nap\u011bt\u00ed, kontrola rozm\u011br\u016f a p\u0159ilnavosti povrchov\u00e9 \u00fapravy.<\/li>\n<li>Environment\u00e1ln\u00ed testy, nap\u0159\u00edklad soln\u00fd spray na po\u017e\u00e1d\u00e1n\u00ed pro \u010d\u00e1sti n\u00e1chyln\u00e9 ke korozi.<\/li>\n<li>Podpora dokumentace pro shodu s materi\u00e1lov\u00fdmi normami (RoHS\/REACH) a inspek\u010dn\u00ed zpr\u00e1vy pro spln\u011bn\u00ed po\u017eadavk\u016f dodavatelsk\u00e9ho \u0159et\u011bzce.<\/li>\n<\/ul>\n<h3>P\u0159\u00edpadov\u00e9 studie a praktick\u00e9 p\u0159\u00edklady<\/h3>\n<ul>\n<li>Automobilov\u00fd senzor: Nahrazen\u00ed standardn\u00edho NdFeB magnetu za SmCo pro senzor pod kapotou s teplotou 180\u2013220\u00b0C. V\u00fdsledek: stabiln\u00ed v\u00fdstup, m\u00e9n\u011b poruch v poli.<\/li>\n<li>Pr\u016fmyslov\u00fd sp\u00edna\u010d trouby: Pou\u017eit\u00ed Alnico pro vysokoteplotn\u00ed pohon pracuj\u00edc\u00ed bl\u00edzko 350\u00b0C \u2014 jednoduch\u00e9, spolehliv\u00e9 magnetick\u00e9 dr\u017een\u00ed bez slo\u017eit\u00e9ho chlazen\u00ed.<\/li>\n<li>Mal\u00fd vysokoteplotn\u00ed motor: Dodal vysokoteplotn\u00ed t\u0159\u00eddu NdFeB s speci\u00e1ln\u00edm povrchem a ov\u011b\u0159en\u00edm tepeln\u00e9ho cyklu pro dopravn\u00edk s provozem do 180\u00b0C.<\/li>\n<\/ul>\n<p>Pokud pot\u0159ebujete pomoc s v\u00fdb\u011brem mezi odolnost\u00ed magnet\u016f Alnico v\u016f\u010di teplot\u00e1m, vysokoteplotn\u00edmi samarium-kobaltov\u00fdmi magnety nebo mo\u017enostmi teplotn\u00edho hodnocen\u00ed NdFeB magnet\u016f pro aplikaci v \u010cesk\u00e9 republice, spo\u010d\u00edt\u00e1me to, vytvo\u0159\u00edme prototyp a otestujeme, aby magnet, kter\u00fd si vyberete, vydr\u017eel tam, kde je pot\u0159eba.<\/p>\n<h2>Kter\u00e9 magnety odol\u00e1vaj\u00ed vysok\u00fdm teplot\u00e1m<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/high-temperature_magnet_selection_sGV.webp\" alt=\"v\u00fdb\u011br vysokoteplotn\u00edch magnet\u016f\" \/><\/p>\n<h3>Tipy pro v\u00fdb\u011br spr\u00e1vn\u00e9ho magnetu pro aplikace s vysokou teplotou<\/h3>\n<p>Udr\u017euji to stru\u010dn\u00e9 a praktick\u00e9, abyste mohli rychle ud\u011blat spr\u00e1vnou volbu.<\/p>\n<ul>\n<li><strong>Za\u010dn\u011bte s re\u00e1lnou maxim\u00e1ln\u00ed teplotou<\/strong>\n<ul>\n<li>Zn\u00e1te teplotu nep\u0159etr\u017eit\u00e9ho provozu, kr\u00e1tk\u00e9 \u0161pi\u010dky a bezpe\u010dnostn\u00ed rezervu (obvykle +20\u201350\u00b0C).<\/li>\n<li>Pamatujte na Curieovu teplotu: vyberte magnet, jeho\u017e Curieova bod a provozn\u00ed reten\u010dn\u00ed vlastnosti jsou dob\u0159e nad va\u0161\u00edm maximem.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Myslete na tepeln\u00e9 cykly, nikoliv jen na maxim\u00e1ln\u00ed teplotu<\/strong>\n<ul>\n<li>Opakovan\u00e9 oh\u0159evy\/chlazen\u00ed zp\u016fsobuj\u00ed dlouhodob\u011bj\u0161\u00ed ztr\u00e1ty ne\u017e jedna \u0161pi\u010dka.<\/li>\n<li>Vyberte materi\u00e1ly zn\u00e1m\u00e9 svou stabilitou p\u0159i tepeln\u00fdch cyklech (nap\u0159\u00edklad vysokoteplotn\u00ed samarium-kobaltov\u00e9 magnety oproti NdFeB pro mnoho cykl\u016f).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Zkontrolujte udr\u017een\u00ed magnetick\u00e9 s\u00edly nap\u0159\u00ed\u010d va\u0161\u00edm rozsahem<\/strong>\n<ul>\n<li>Po\u017eadujte od dodavatele BH k\u0159ivky nebo \u00fadaje o teplotn\u00edm koeficientu.<\/li>\n<li>Porovnejte o\u010dek\u00e1vanou procentu\u00e1ln\u00ed ztr\u00e1tu toku p\u0159i va\u0161\u00ed maxim\u00e1ln\u00ed teplot\u011b \u2014 r\u016fzn\u00e9 t\u0159\u00eddy se chovaj\u00ed velmi odli\u0161n\u011b.<\/li>\n<\/ul>\n<\/li>\n<li><strong>P\u0159izp\u016fsobte materi\u00e1l prost\u0159ed\u00ed a zat\u00ed\u017een\u00ed<\/strong>\n<ul>\n<li>Koroze nebo oxidace? Vyberte odoln\u00e9 materi\u00e1ly proti korozi nebo pou\u017eijte vhodn\u00e9 povlaky.<\/li>\n<li>Mechanick\u00fd stres nebo vibrace? Zva\u017ete odoln\u011bj\u0161\u00ed materi\u00e1ly a pevn\u00e9 upevn\u011bn\u00ed.<\/li>\n<li>Obvykl\u00e9 kompromisy: Alnico magnety maj\u00ed vysokou teplotn\u00ed odolnost, ale ni\u017e\u0161\u00ed coercivitu; teplotn\u00ed hodnocen\u00ed NdFeB se li\u0161\u00ed podle t\u0159\u00eddy a m\u016f\u017ee vy\u017eadovat ochranu; keramick\u00e9 ferrity a SmCo nab\u00edzej\u00ed dobrou odolnost v\u016f\u010di teplu a stabilitu.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Pe\u010dliv\u011b pl\u00e1nujte povlaky a kryty<\/strong>\n<ul>\n<li>Mnoho ochrann\u00fdch povlak\u016f selh\u00e1v\u00e1 p\u0159i vysok\u00fdch teplot\u00e1ch. Zva\u017ete nerezov\u00e9 kryty nebo t\u011bsn\u011bn\u00ed s vysokou teplotn\u00ed odolnost\u00ed m\u00edsto standardn\u00edho povlaku.<\/li>\n<li>Pro potravin\u00e1\u0159sk\u00e9 pece, motory nebo za\u0159\u00edzen\u00ed na palub\u011b lod\u00ed na trhu v \u010cesk\u00e9 republice se zeptejte na povrchov\u00e9 \u00fapravy NSF nebo leteck\u00e9 t\u0159\u00eddy, kde je to pot\u0159eba.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Pracujte s dodavatelem, kter\u00fd prov\u00e1d\u00ed testov\u00e1n\u00ed a prototypov\u00e1n\u00ed<\/strong>\n<ul>\n<li>Doporu\u010duji spolupr\u00e1ci s partnerem jako NBAEM pro:\n<ul>\n<li>v\u00fdb\u011br materi\u00e1l\u016f (SmCo, Alnico, vysokoteplotn\u00ed NdFeB, ferrit)<\/li>\n<li>zak\u00e1zkov\u00e9 t\u0159\u00eddy a geometrie<\/li>\n<li>testov\u00e1n\u00ed tepeln\u00fdch cykl\u016f a vysokoteplotn\u00edho v\u00fdkonu<\/li>\n<li>malov\u00fdroba prototyp\u016f a kontrola kvality v\u00fdroby<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>Rychl\u00fd kontroln\u00ed seznam p\u0159ed n\u00e1kupem<\/strong>\n<ul>\n<li>Maxim\u00e1ln\u00ed provozn\u00ed teplota a \u0161pi\u010dky<\/li>\n<li>O\u010dek\u00e1van\u00fd po\u010det tepeln\u00fdch cykl\u016f<\/li>\n<li>Po\u017eadovan\u00fd procentu\u00e1ln\u00ed z\u00e1chyt taveniny p\u0159i teplot\u011b<\/li>\n<li>Korozivn\u00ed nebo oxida\u010dn\u00ed prost\u0159ed\u00ed<\/li>\n<li>Mechanick\u00e9 zat\u00ed\u017een\u00ed a zp\u016fsob upevn\u011bn\u00ed<\/li>\n<li>Pot\u0159eba povrchov\u00e9 \u00fapravy nebo pouzdra pro vysok\u00e9 teploty<\/li>\n<li>Po\u017e\u00e1dejte dodavatele o testovac\u00ed data a vzorky<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Budouc\u00ed trendy v magnetech s vysokou teplotn\u00ed odolnost\u00ed<\/h2>\n<p>Sleduji n\u011bkolik jasn\u00fdch trend\u016f, kter\u00e9 jsou d\u016fle\u017eit\u00e9 pro z\u00e1kazn\u00edky v \u010cesk\u00e9 republice, kte\u0159\u00ed pot\u0159ebuj\u00ed tepeln\u011b odoln\u00e9 magnetick\u00e9 materi\u00e1ly v re\u00e1ln\u00e9m prost\u0159ed\u00ed.<\/p>\n<ul>\n<li>Pokro\u010dil\u00e1 technologie vz\u00e1cn\u00fdch zemin magnet\u016f\n<ul>\n<li><strong>Difuze na hranic\u00edch zrn a koercivita NdFeB<\/strong> zv\u00fd\u0161it teplotn\u00ed odolnost magnet\u016f NdFeB bez velk\u00e9 ztr\u00e1ty pevnosti. To znamen\u00e1, \u017ee n\u011bkter\u00e9 t\u0159\u00eddy NdFeB lze pou\u017e\u00edvat bl\u00ed\u017ee k 200\u00b0C s lep\u0161\u00ed retenc\u00ed<\/li>\n<li><strong>Vylep\u0161en\u00ed SmCo<\/strong> zam\u011b\u0159it se na je\u0161t\u011b lep\u0161\u00ed tepelnou stabilitu pro prost\u0159ed\u00ed p\u0159i 250\u2013350\u00b0C.<\/li>\n<\/ul>\n<\/li>\n<li>Nov\u00e9 materi\u00e1ly a kompozity\n<ul>\n<li>V\u00fdzkum v oblasti <strong>refraktern\u00edch magnetick\u00fdch slitin a spojovan\u00fdch kompozit\u016f<\/strong> c\u00edl\u00ed na posunut\u00ed provozn\u00edch teplot nad sou\u010dasn\u00e9 limity p\u0159i zachov\u00e1n\u00ed odolnosti v\u016f\u010di korozi.<\/li>\n<\/ul>\n<\/li>\n<li>Lep\u0161\u00ed t\u011bsn\u011bn\u00ed a uz\u00e1v\u011bry\n<ul>\n<li><strong>Vylep\u0161en\u00e9 povlaky (keramick\u00e9, niklov\u00e9, hermetick\u00e9 t\u011bsn\u011bn\u00ed)<\/strong> sn\u00ed\u017een\u00ed oxidace a tepeln\u00e9ho rozkladu, co\u017e je kl\u00ed\u010dov\u00e9 pro dlouhodobou spolehlivost v troub\u00e1ch, motorov\u00fdch prostor\u00e1ch a pr\u016fmyslov\u00fdch tepeln\u00fdch procesech.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Pokroky ve v\u00fdrob\u011b<\/p>\n<ul>\n<li><strong>P\u0159\u00eddavn\u00e9 v\u00fdroba a hork\u00e9 lisov\u00e1n\u00ed<\/strong> umo\u017e\u0148uje n\u00e1m vytv\u00e1\u0159et slo\u017eit\u00e9 tvary a optimalizovan\u00e9 mikrostruktury, kter\u00e9 vydr\u017e\u00ed p\u0159i tepeln\u00e9m cyklen\u00ed. To pom\u00e1h\u00e1 motorem a senzory v letectv\u00ed a elektromobilech.<\/li>\n<li>Bl\u00ed\u017ee ke zdroji zpracov\u00e1n\u00ed vz\u00e1cn\u00fdch zemin v \u010cesk\u00e9 republice tak\u00e9 zlep\u0161uje stabilitu pro vysokoteplotn\u00ed samarium-kobaltov\u00e9 magnety a speci\u00e1ln\u00ed t\u0159\u00eddy NdFeB.<\/li>\n<li>Testov\u00e1n\u00ed a zam\u011b\u0159en\u00ed na \u017eivotnost\n<ul>\n<li>O\u010dek\u00e1vejte p\u0159\u00edsn\u011bj\u0161\u00ed urychlen\u00e9 testy tepeln\u00fdch cykl\u016f a standardizovan\u00e9 hodnocen\u00ed, aby in\u017een\u00fd\u0159i v\u011bd\u011bli, jak budou magnety fungovat b\u011bhem let, nikoliv jen p\u0159i jedn\u00e9 teplot\u011b.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Pokud navrhujete pro teplo, tyto trendy znamenaj\u00ed v\u00edce mo\u017enost\u00ed: vy\u0161\u0161\u00ed v\u00fdkon p\u0159i vysok\u00fdch teplot\u00e1ch, lep\u0161\u00ed povlaky a chyt\u0159ej\u0161\u00ed v\u00fdrobu, kter\u00e1 odpov\u00edd\u00e1 pot\u0159eb\u00e1m pr\u016fmyslu v \u010cesk\u00e9 republice.<\/p>","protected":false},"excerpt":{"rendered":"<p>Kter\u00e9 magnety vydr\u017e\u00ed vysok\u00e9 teploty? Nau\u010dte se, jak\u00e9 magnety Alnico, SmCo, NdFeB a ferrit zvl\u00e1daj\u00ed teploty a\u017e do 540\u00b0C, viz \u0159e\u0161en\u00ed NBAEM<\/p>","protected":false},"author":1,"featured_media":1853,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1854","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/high-temperature_permanent_Qeh.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1854","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/comments?post=1854"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1854\/revisions"}],"predecessor-version":[{"id":1859,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1854\/revisions\/1859"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/media\/1853"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/media?parent=1854"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/categories?post=1854"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/tags?post=1854"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}