{"id":254,"date":"2024-05-09T23:57:20","date_gmt":"2024-05-09T15:57:20","guid":{"rendered":"https:\/\/boronnitrideceramic.com\/?p=254"},"modified":"2024-05-09T23:57:20","modified_gmt":"2024-05-09T15:57:20","slug":"keramika-z-nitridu-boru-a-jeji-rozmanite-aplikace","status":"publish","type":"post","link":"https:\/\/boronnitrideceramic.com\/cs\/boron-nitride-ceramic-and-its-many-applications\/","title":{"rendered":"Keramika z nitridu b\u00f3ru a jej\u00ed \u010detn\u00e9 aplikace"},"content":{"rendered":"<p>Obrobiteln\u00e1 keramika z nitridu b\u00f3ru je ide\u00e1ln\u00ed volbou materi\u00e1lu, pokud hled\u00e1te elektrickou izolaci a tepelnou vodivost spolu s v\u00fdjime\u010dnou pevnost\u00ed a odolnost\u00ed proti opot\u0159eben\u00ed - d\u00edky tomu je vhodn\u00e1 i pro \u0159ezn\u00e9 n\u00e1stroje.<\/p>\n<p>\u0160estihrann\u00fd nitrid b\u00f3ru m\u00e1 cibulovitou strukturu s vrstvami, kter\u00e9 vykazuj\u00ed r\u016fzn\u00e9 \u00fahly zkroucen\u00ed v rovin\u011b, co\u017e z tohoto materi\u00e1lu \u010din\u00ed jeden z nejtvrd\u0161\u00edch dostupn\u00fdch materi\u00e1l\u016f.<\/p>\n<h2>Charakteristika<\/h2>\n<p>Keramika s nitridem b\u00f3ru je tvrd\u00fd, pevn\u00fd, ot\u011bruvzdorn\u00fd a korozivzdorn\u00fd materi\u00e1l s v\u00fdjime\u010dn\u00fdmi vlastnostmi odolnosti proti opot\u0159eben\u00ed a korozi. Jako odoln\u00e9 materi\u00e1ly, kter\u00e9 jsou schopny odol\u00e1vat velmi vysok\u00fdm teplot\u00e1m a radiaci, je keramika na b\u00e1zi nitridu b\u00f3ru ide\u00e1ln\u00edm materi\u00e1lem pro pou\u017eit\u00ed v jadern\u00fdch reaktorech a v letectv\u00ed a kosmonautice. D\u00edky sv\u00fdm v\u00fdjime\u010dn\u00fdm mazac\u00edm vlastnostem jsou vhodn\u00e9 i pro pou\u017eit\u00ed ve v\u00fdrob\u011b, kde jejich n\u00edzk\u00e1 \u00farove\u0148 t\u0159en\u00ed pom\u00e1h\u00e1 hlad\u0161\u00edmu \u0159ez\u00e1n\u00ed kov\u016f p\u0159i \u0159ez\u00e1n\u00ed nebo brou\u0161en\u00ed jin\u00fdch kov\u016f.<\/p>\n<p>Hexagon\u00e1ln\u00ed nitrid b\u00f3ru (h-BN) je z\u00e1kladn\u00ed technick\u00e1 keramika s analogickou strukturou podobnou hexagon\u00e1ln\u00edm vrstv\u00e1m grafitu, v n\u00ed\u017e jsou atomy b\u00f3ru a dus\u00edku v\u00e1z\u00e1ny siln\u00fdmi kovalentn\u00edmi vazbami a vytv\u00e1\u0159ej\u00ed hexagon\u00e1ln\u00ed vrstvy, kter\u00e9 obsahuj\u00ed hexagon\u00e1ln\u00ed hexagon\u00e1ln\u00ed struktury uspo\u0159\u00e1dan\u00e9 hexagon\u00e1ln\u011b na hexagon\u00e1ln\u00edch vrstv\u00e1ch, co\u017e vytv\u00e1\u0159\u00ed jedine\u010dn\u00e9 vlastnosti a charakteristiky, kter\u00e9 se u jin\u00e9 technick\u00e9 keramiky nevyskytuj\u00ed.<\/p>\n<p>H-BN dob\u0159e odol\u00e1v\u00e1 extr\u00e9mn\u00edm n\u00e1raz\u016fm a nam\u00e1h\u00e1n\u00ed, tak\u017ee je ide\u00e1ln\u00ed pro pou\u017eit\u00ed jako tygl\u00edk v metalurgii hlin\u00edku, vz\u00e1cn\u00fdch zemin, keramiky a dal\u0161\u00edch kov\u016f. Nav\u00edc odol\u00e1v\u00e1 vysok\u00fdm tlak\u016fm a teplot\u00e1m, ani\u017e by podl\u00e9hal uhl\u00edkov\u00e9 korozi, a z\u00e1rove\u0148 z\u016fst\u00e1v\u00e1 bez reakce s tekut\u00fdm kovem. Krom\u011b toho je h-BN d\u00edky tomuto materi\u00e1lu vynikaj\u00edc\u00edm kandid\u00e1tem na v\u00fdrobu vysoce v\u00fdkonn\u00fdch povlak\u016f pou\u017e\u00edvan\u00fdch k lemov\u00e1n\u00ed nebo potahov\u00e1n\u00ed pr\u016fmyslov\u00fdch za\u0159\u00edzen\u00ed.<\/p>\n<p>h-BN lze snadno obr\u00e1b\u011bt pomoc\u00ed standardn\u00edch \u0159ezn\u00fdch n\u00e1stroj\u016f z rychlo\u0159ezn\u00e9 oceli a v p\u0159\u00edpad\u011b pot\u0159eby i pomoc\u00ed karbidov\u00fdch nebo diamantov\u00fdch n\u00e1stroj\u016f. Proto\u017ee umo\u017e\u0148uje relativn\u011b snadno dos\u00e1hnout slo\u017eit\u00fdch tvar\u016f a detail\u016f, je h-BN ide\u00e1ln\u00ed pro aplikace, kter\u00e9 jsou jinak s jin\u00fdmi typy keramick\u00fdch materi\u00e1l\u016f nemo\u017en\u00e9.<\/p>\n<p>Kubick\u00fd nitrid b\u00f3ru (c-BN) se vyr\u00e1b\u00ed lisov\u00e1n\u00edm hexagon\u00e1ln\u00edho h-BN za vysok\u00e9ho tlaku a teploty, podobn\u011b jako se syntetick\u00fd diamant tvo\u0159\u00ed z grafitu. Na rozd\u00edl od diamantu se v\u0161ak c-BN vyzna\u010duje n\u00edzkou teplotou t\u00e1n\u00ed a abrazivitou, d\u00edky \u010demu\u017e je vhodn\u00fd k v\u00fdrob\u011b tvrd\u00fdch povlak\u016f s vynikaj\u00edc\u00ed odolnost\u00ed proti po\u0161kr\u00e1b\u00e1n\u00ed a od\u011bru.<\/p>\n<p>lonsdaleitov\u00e1 modifikace nitridu b\u00f3ru vynik\u00e1 mezi ostatn\u00edmi modifikacemi jako jeden z nejtvrd\u0161\u00edch zn\u00e1m\u00fdch materi\u00e1l\u016f. D\u00edky sv\u00fdm mimo\u0159\u00e1dn\u00fdm vlastnostem a potenci\u00e1lu p\u0159ekonat i c-BN jako nejtvrd\u0161\u00ed materi\u00e1l na sv\u011bt\u011b otev\u0159ely jeho jedine\u010dn\u00e9 vlastnosti nov\u00e9 cesty v\u00fdzkumu v oblasti vysoce v\u00fdkonn\u00fdch keramick\u00fdch materi\u00e1l\u016f, kter\u00e9 mohou v\u00e9st k nov\u00fdm pr\u016fmyslov\u00fdm aplikac\u00edm; vzhledem k omezen\u00e9 komer\u010dn\u00ed dostupnosti v\u0161ak lonsdaleit z\u016fst\u00e1v\u00e1 v sou\u010dasn\u00e9 dob\u011b nevyu\u017eit\u00fd.<\/p>\n<h2>Aplikace<\/h2>\n<p>Keramika s nitridem b\u00f3ru se vyzna\u010duje tepelnou a chemickou odolnost\u00ed, odolnost\u00ed proti elektrick\u00e9mu opot\u0159eben\u00ed a lom\u016fm, tak\u017ee je ide\u00e1ln\u00ed pro mnoho aplikac\u00ed. Jsou lehk\u00e9, maj\u00ed n\u00edzkou dielektrickou konstantu a vysoce odoln\u00e9 vlastnosti, d\u00edky nim\u017e odol\u00e1vaj\u00ed vysok\u00fdm teplot\u00e1m - co\u017e z nich \u010din\u00ed skv\u011blou volbu pro pou\u017eit\u00ed ve v\u00fdkonov\u00e9 elektronice vy\u017eaduj\u00edc\u00ed chlazen\u00ed - a d\u00edky sv\u00e9 pevnosti a odolnosti se s oblibou pou\u017e\u00edvaj\u00ed k v\u00fdrob\u011b \u0159ezn\u00fdch a brusn\u00fdch n\u00e1stroj\u016f pro pou\u017eit\u00ed v leteck\u00e9m pr\u016fmyslu.<\/p>\n<p>\u0160estihrann\u00fd nitrid b\u00f3ru (h-BN) je jedn\u00edm z nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edch objemov\u00fdch keramick\u00fdch materi\u00e1l\u016f. Tato krystalick\u00e1 slou\u010denina m\u00e1 podobnou krystalickou strukturu jako grafit, av\u0161ak hexagon\u00e1ln\u00ed nitrid b\u00f3ru je v\u00fdrazn\u011b tvrd\u0161\u00ed ne\u017e grafit, je biokompatibiln\u00ed a z\u00e1rove\u0148 odol\u00e1v\u00e1 vysok\u00fdm teplot\u00e1m - je tedy vynikaj\u00edc\u00ed volbou pro dent\u00e1ln\u00ed aplikace.<\/p>\n<p>D\u00edky sv\u00e9 v\u00fdjime\u010dn\u00e9 tepeln\u00e9 stabilit\u011b a chemick\u00e9 inertnosti se h-BN \u010dasto pou\u017e\u00edv\u00e1 jako antikorozn\u00ed ochrana proti jin\u00fdm materi\u00e1l\u016fm. H-BN dok\u00e1\u017ee zabr\u00e1nit absorpci vody z roztaven\u00fdch kov\u016f, jako jsou slitiny hlin\u00edku, ho\u0159\u010d\u00edku a zinku, a tak\u00e9 ze strusky vznikaj\u00edc\u00ed p\u0159i tavic\u00edch procesech, \u010d\u00edm\u017e poskytuje komplexn\u00ed ochranu sou\u010d\u00e1stek vystaven\u00fdch takov\u00e9mu prost\u0159ed\u00ed.<\/p>\n<p>H-BN poskytuje keramice, kter\u00e1 p\u0159ich\u00e1z\u00ed do styku s t\u011bmito l\u00e1tkami, nekompromisn\u00ed ochranu p\u0159ed sklem, solemi a v\u011bt\u0161inou roztaven\u00fdch kov\u016f - nemluv\u011b o chemick\u00fdch \u00fatoc\u00edch - bezkonkuren\u010dn\u00ed ochranu. Krom\u011b toho je odoln\u00fd v\u016f\u010di chemick\u00fdm \u00fatok\u016fm, tak\u017ee je vhodn\u00fd pro drsn\u00e9 pr\u016fmyslov\u00e9 prost\u0159ed\u00ed.<\/p>\n<p>Krom\u011b \u017e\u00e1douc\u00edch vlastnost\u00ed se h-BN snadno obr\u00e1b\u00ed. Slo\u017eit\u00e9 geometrie s p\u0159\u00edsn\u00fdmi tolerancemi lze vytv\u00e1\u0159et rychle bez pou\u017eit\u00ed chladic\u00edch kapalin nebo maziv - to usnad\u0148uje vytv\u00e1\u0159en\u00ed d\u00edl\u016f s vysokou p\u0159esnost\u00ed a opakovatelnost\u00ed.<\/p>\n<p>Tradi\u010dn\u00ed keramick\u00e9 materi\u00e1ly, jako je oxid hlinit\u00fd nebo zirkon, lze obt\u00ed\u017en\u011b opracovat do slo\u017eit\u00fdch tvar\u016f. Materi\u00e1l H-BN m\u00e1 tu v\u00fdhodu, \u017ee se d\u00e1 obr\u00e1b\u011bt vy\u0161\u0161\u00edmi rychlostmi ne\u017e tyto jin\u00e9 materi\u00e1ly, a proto je vhodn\u011bj\u0161\u00ed pro vysoce v\u00fdkonn\u00e9 aplikace.<\/p>\n<h2>V\u00fdroba<\/h2>\n<p>Sou\u010d\u00e1sti z nitridu b\u00f3ru se obvykle vytv\u00e1\u0159ej\u00ed lisov\u00e1n\u00edm materi\u00e1lu za tepla p\u0159i vysok\u00fdch teplot\u00e1ch a tlac\u00edch, \u010d\u00edm\u017e se vytv\u00e1\u0159ej\u00ed hust\u00e9 struktury s rovnom\u011brnou hustotou. Alternativn\u011b mohou b\u00fdt d\u00edly obr\u00e1b\u011bny z pevn\u00fdch blok\u016f tohoto materi\u00e1lu. Bez ohledu na to, kter\u00e1 v\u00fdrobn\u00ed metoda je pou\u017eita, mus\u00ed b\u00fdt v\u0161echny sou\u010d\u00e1sti z nitridu b\u00f3ru p\u0159ed nasazen\u00edm do aplikac\u00ed nejprve zkontrolov\u00e1ny z hlediska vizu\u00e1ln\u00edch vad, chemick\u00e9ho slo\u017een\u00ed a fyzik\u00e1ln\u00edch vlastnost\u00ed.<\/p>\n<p>Keramick\u00fd materi\u00e1l z nitridu b\u00f3ru je mimo\u0159\u00e1dn\u011b odoln\u00fd keramick\u00fd materi\u00e1l, kter\u00fd lze obr\u00e1b\u011bt a kter\u00fd je vysoce odoln\u00fd v\u016f\u010di korozi a dal\u0161\u00edm drsn\u00fdm podm\u00ednk\u00e1m. D\u00edky sv\u00e9 nereaktivit\u011b je nav\u00edc vhodn\u00fd pro aplikace vy\u017eaduj\u00edc\u00ed vysokou teplotn\u00ed stabilitu; nav\u00edc nereaguje se sklem, solemi ani v\u011bt\u0161inou kov\u016f, tak\u017ee je vhodn\u00fd pro pou\u017eit\u00ed ve vakuu.<\/p>\n<p>BN m\u00e1 \u0159adu aplikac\u00ed a lze jej nal\u00e9zt v n\u011bkolika form\u00e1ch, od slinut\u00e9ho nitridu b\u00f3ru pro vysokoteplotn\u00ed v\u00fdkony a abraziva a \u0159ezn\u00e9 materi\u00e1ly odoln\u00e9 proti opot\u0159eben\u00ed, p\u0159es materi\u00e1ly odoln\u00e9 proti opot\u0159eben\u00ed z kubick\u00e9ho nitridu b\u00f3ru a povlaky pro vytla\u010dovac\u00ed n\u00e1stroje, a\u017e po pou\u017eit\u00ed jako uvol\u0148ovac\u00ed \u010dinidla pro procesy tv\u00e1\u0159en\u00ed kov\u016f a ta\u017een\u00ed dr\u00e1t\u016f, povlaky pou\u017e\u00edvan\u00e9 na vytla\u010dovac\u00edch n\u00e1stroj\u00edch, uvol\u0148ovac\u00ed \u010dinidla pou\u017e\u00edvan\u00e1 b\u011bhem operac\u00ed tv\u00e1\u0159en\u00ed kov\u016f nebo ta\u017een\u00ed dr\u00e1t\u016f, jako\u017e i jeho vlastnosti odoln\u00e9 proti tepeln\u00fdm \u0161ok\u016fm a elektrick\u00e9 izola\u010dn\u00ed vlastnosti, d\u00edky nim\u017e je vhodn\u00fdm materi\u00e1lem pro vysoce v\u00fdkonn\u00e9 elektronick\u00e9 sou\u010d\u00e1stky d\u00edky sv\u00fdm vlastnostem odolnosti proti tepeln\u00fdm \u0161ok\u016fm a elektrick\u00e9 izolaci.<\/p>\n<p>Krystalov\u00e1 struktura hexagon\u00e1ln\u00edho nitridu b\u00f3ru se podob\u00e1 struktu\u0159e grafitu a poskytuje mnoho stejn\u00fdch v\u00fdkonnostn\u00edch v\u00fdhod. Nitrid hexagon\u00e1ln\u00edho boru, ozna\u010dovan\u00fd tak\u00e9 jako b\u00edl\u00fd grafit, poskytuje vynikaj\u00edc\u00ed tepelnou stabilitu, elektrick\u00e9 vlastnosti a schopnost odv\u00e1d\u011bt teplo, p\u0159i\u010dem\u017e je tvrd\u00fd a odoln\u00fd proti ot\u011bru - vlastnosti, kter\u00e9 jej \u010din\u00ed u\u017eite\u010dn\u00fdm v mnoha pr\u016fmyslov\u00fdch aplikac\u00edch.<\/p>\n<p>Pyrolitick\u00fd nitrid b\u00f3ru (PBN) je velmi \u010dist\u00fd pevn\u00fd nitrid b\u00f3ru vyr\u00e1b\u011bn\u00fd metodou chemick\u00e9 depozice z par (CVD). Jak ji\u017e jeho n\u00e1zev napov\u00edd\u00e1, PBN nab\u00edz\u00ed vynikaj\u00edc\u00ed vysokoteplotn\u00ed v\u00fdkon i mechanickou pevnost a lze jej vyr\u00e1b\u011bt do tenk\u00fdch pl\u00e1t\u016f, kter\u00e9 lze pou\u017e\u00edt v trysk\u00e1ch s Hallov\u00fdm efektem, i do tvar\u016f na zak\u00e1zku ur\u010den\u00fdch pro pou\u017eit\u00ed v \u017e\u00e1ruvzdorn\u00fdch a polovodi\u010dov\u00fdch aplikac\u00edch.<\/p>\n<p>\u0160estihrann\u00fd nitrid b\u00f3ru lze obr\u00e1b\u011bt s p\u0159esn\u00fdmi tolerancemi, co\u017e z n\u011bj \u010din\u00ed vynikaj\u00edc\u00ed materi\u00e1l pro aplikace se slo\u017eitou geometri\u00ed. T\u00fdm spole\u010dnosti Precision Ceramics m\u00e1 rozs\u00e1hl\u00e9 zku\u0161enosti s prac\u00ed s t\u00edmto v\u0161estrann\u00fdm materi\u00e1lem a m\u016f\u017ee v\u00e1m pomoci s n\u00e1vrhem sou\u010d\u00e1st\u00ed, kter\u00e9 spln\u00ed v\u0161echny va\u0161e po\u017eadavky. Abychom v\u00e1m zaru\u010dili, \u017ee p\u0159i v\u00fdrob\u011b obdr\u017e\u00edte pouze vysoce kvalitn\u00ed d\u00edly z nitridu b\u00f3ru, zahrnuj\u00ed na\u0161e testy kvality testy rentgenov\u00e9 difrakce a infra\u010derven\u00e9 spektroskopie s Fourierovou transformac\u00ed, kter\u00e9 ov\u011b\u0159uj\u00ed jeho \u010distotu, krystalovou strukturu, respektive chemick\u00e9 slo\u017een\u00ed.<\/p>\n<h2>Zpracov\u00e1n\u00ed<\/h2>\n<p>D\u00edky sv\u00fdm charakteristick\u00fdm fyzik\u00e1ln\u00edm vlastnostem je nitrid b\u00f3ru vynikaj\u00edc\u00edm keramick\u00fdm materi\u00e1lem, kter\u00fd je ide\u00e1ln\u00ed pro pou\u017eit\u00ed v mnoha pr\u016fmyslov\u00fdch aplikac\u00edch. Tato syntetick\u00e1 technick\u00e1 keramika se m\u016f\u017ee pochlubit vynikaj\u00edc\u00ed chemickou stabilitou a mechanickou pevnost\u00ed spolu s v\u00fdjime\u010dn\u00fdmi tepeln\u00fdmi vlastnostmi pro v\u0161estrann\u00e9 pou\u017eit\u00ed, od sp\u00e9kan\u00fdch komponent BN a\u017e po abraziva a \u0159ezn\u00e9 materi\u00e1ly odoln\u00e9 proti opot\u0159eben\u00ed z kubick\u00e9ho nitridu boru (cBN).<\/p>\n<p>Nitrid b\u00f3ru je ide\u00e1ln\u00edm materi\u00e1lem pro sou\u010d\u00e1sti pec\u00ed, jako jsou tavic\u00ed krou\u017eky, izol\u00e1tory a trysky, a to d\u00edky sv\u00e9 dobr\u00e9 mikrovlnn\u00e9 pr\u016fhlednosti a odolnosti v\u016f\u010di vlhkosti, tak\u017ee je vhodn\u00fd pro t\u011bsn\u011bn\u00ed povrch\u016f, kter\u00e9 p\u0159ich\u00e1zej\u00ed do styku s tekut\u00fdmi kovy nebo roztaven\u00fdmi struskami. Krom\u011b toho je d\u00edky sv\u00e9 vynikaj\u00edc\u00ed mikrovlnn\u00e9 pr\u016fhlednosti a odolnosti proti vlhkosti vhodn\u00fd pro pou\u017eit\u00ed jako \u017e\u00e1ruvzdorn\u00e9 komponenty.<\/p>\n<p>D\u00edky n\u00edzk\u00e9mu koeficientu teplotn\u00ed rozta\u017enosti je BN vysoce stabiln\u00ed v \u0161irok\u00e9m rozsahu teplot a nen\u00ed v\u00fdrazn\u011b ovlivn\u011bn n\u00e1hl\u00fdm zv\u00fd\u0161en\u00edm nebo sn\u00ed\u017een\u00edm teploty. To mu umo\u017e\u0148uje odol\u00e1vat vysok\u00fdm teplot\u00e1m bez degradace v n\u00e1ro\u010dn\u00fdch podm\u00ednk\u00e1ch, kde by jin\u00e9 materi\u00e1ly rychle praskaly nebo se rozkl\u00e1daly.<\/p>\n<p>BN m\u00e1 extr\u00e9mn\u011b n\u00edzkou tepelnou hmotnost, co\u017e d\u00e1le zlep\u0161uje jeho tepeln\u00e9 vlastnosti. V kombinaci s n\u00edzkou tepelnou rozta\u017enost\u00ed a odolnost\u00ed proti oxidaci je BN vynikaj\u00edc\u00edm materi\u00e1lem pro vysokoteplotn\u00ed aplikace, a to v\u00edce ne\u017e jeho niklov\u00e9 a kobaltov\u00e9 prot\u011bj\u0161ky!<\/p>\n<p>Jako pr\u00e1\u0161ek se BN snadno obr\u00e1b\u00ed standardn\u00edmi \u0159ezn\u00fdmi n\u00e1stroji z rychlo\u0159ezn\u00e9 oceli. N\u00e1stroje s karbidovou \u0161pi\u010dkou mohou b\u00fdt vhodn\u00e9 pro n\u00e1ro\u010dn\u011bj\u0161\u00ed druhy nitridu boru (nitrid titanu nebo ZSBN), zat\u00edmco diamantov\u00e9 n\u00e1stroje mohou b\u00fdt vhodn\u00e9 pro velmi tvrd\u00e9 druhy (ZSBN).<\/p>\n<p>\u0160estihrann\u00fd nitrid b\u00f3ru (hBN) lze snadno fr\u00e9zovat do tvaru such\u00fdm brou\u0161en\u00edm pomoc\u00ed brusiva nebo vodn\u00edho paprsku, tak\u017ee je vhodn\u00fd pro p\u0159esn\u00e9 obr\u00e1b\u011bn\u00ed slo\u017eit\u00fdch tvar\u016f. Na rozd\u00edl od mnoha keramick\u00fdch materi\u00e1l\u016f nav\u00edc nitrid boru vykazuje minim\u00e1ln\u00ed tepelnou rozta\u017enost, tak\u017ee \u0159ezn\u00e9 rychlosti z\u016fst\u00e1vaj\u00ed b\u011bhem fr\u00e9zov\u00e1n\u00ed konstantn\u00ed.<\/p>\n<p>Slinut\u00fd nitrid b\u00f3ru lze pro dosa\u017een\u00ed lep\u0161\u00edch vlastnost\u00ed zpevnit oxidy a karbidy. Jeden z takov\u00fdch materi\u00e1l\u016f, ZSBN - skl\u00e1daj\u00edc\u00ed se z tvrd\u00fdch \u010d\u00e1stic ZrO2 rovnom\u011brn\u011b rozpt\u00fdlen\u00fdch mezi m\u011bkk\u00fdmi desti\u010dkami BN v matrici z borosilik\u00e1tov\u00e9ho skla - v\u00fdrazn\u011b t\u011b\u017e\u00ed z vyztu\u017een\u00ed oxidy a karbidy pro odolnost v\u016f\u010di mokru, tak\u017ee je vhodn\u00fd pro p\u0159eru\u0161ovac\u00ed krou\u017eky pro kontinu\u00e1ln\u00ed lit\u00ed i pro rozpra\u0161ovac\u00ed trysky vhodn\u00e9 pro taveniny lehk\u00fdch kov\u016f.<\/p>","protected":false},"excerpt":{"rendered":"<p>Machinable boron nitride ceramic is an ideal material choice when looking for electrical insulation and thermal conductivity, along with exceptional [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ngg_post_thumbnail":0,"footnotes":""},"categories":[4],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/posts\/254"}],"collection":[{"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/comments?post=254"}],"version-history":[{"count":1,"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/posts\/254\/revisions"}],"predecessor-version":[{"id":255,"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/posts\/254\/revisions\/255"}],"wp:attachment":[{"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/media?parent=254"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/categories?post=254"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boronnitrideceramic.com\/cs\/wp-json\/wp\/v2\/tags?post=254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}