Brusiva z karbidu k\u0159em\u00edku (SiC) se dod\u00e1vaj\u00ed v r\u016fzn\u00fdch zrnitostech a \u010dasto se vyskytuj\u00ed jak ve spojovan\u00fdch, tak v povlakovan\u00fdch brusivech. Zat\u00edmco SiC lze p\u0159irozen\u011b nal\u00e9zt v moissanitov\u00fdch \u0161perc\u00edch, v\u011bt\u0161ina v\u00fdroby SiC vyu\u017e\u00edv\u00e1 k v\u00fdrob\u011b bu\u010f Acheson\u016fv proces, nebo technologii chemick\u00e9ho napa\u0159ov\u00e1n\u00ed.<\/p>\n
\u017d\u00e1ruvzdornost, vysok\u00e1 tepeln\u00e1 vodivost a odolnost proti korozi z n\u011bj \u010din\u00ed ide\u00e1ln\u00ed materi\u00e1l pro vyzd\u00edvky pec\u00ed, kel\u00edmk\u016f a dal\u0161\u00edch sou\u010d\u00e1st\u00ed pro v\u00fdrobu oceli.<\/p>\n
Karbid k\u0159em\u00edku je v\u0161eobecn\u011b zn\u00e1m\u00fd pro svou vynikaj\u00edc\u00ed tvrdost (druhou nejvy\u0161\u0161\u00ed po diamantu a kubick\u00e9m nitridu b\u00f3ru), vysokou pevnost, chemickou stabilitu a teplotn\u00ed odolnost - vlastnosti, kter\u00e9 z n\u011bj d\u011blaj\u00ed obl\u00edben\u00fd materi\u00e1l pro keramick\u00e9 a \u017e\u00e1ruvzdorn\u00e9 v\u00fdrobn\u00ed aplikace. Krom\u011b toho karbid k\u0159em\u00edku nach\u00e1z\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed tak\u00e9 ve vysoce v\u00fdkonn\u00fdch elektronick\u00fdch za\u0159\u00edzen\u00edch - konkr\u00e9tn\u011b ve v\u00fdkonov\u00fdch polovodi\u010d\u00edch, tranzistorech s kovov\u00fdmi oxidy (MOSFET) a bipol\u00e1rn\u00edch tranzistorech s izolovan\u00fdm hradlem (IGBT).<\/p>\n
V\u00fdrobci vyr\u00e1b\u011bj\u00ed karbid k\u0159em\u00edku zah\u0159\u00edv\u00e1n\u00edm sm\u011bsi k\u0159emi\u010dit\u00e9ho p\u00edsku a koksu p\u0159i extr\u00e9mn\u011b vysok\u00fdch teplot\u00e1ch, dokud jejich chemickou reakc\u00ed, zn\u00e1mou jako synt\u00e9za SiC, nevznikne krystalizovan\u00e1 forma zn\u00e1m\u00e1 jako zelen\u00fd nebo \u010dern\u00fd SiC v z\u00e1vislosti na stupni \u010distoty. Jakmile je SiC vyroben, m\u016f\u017ee b\u00fdt d\u00e1le zu\u0161lecht\u011bn na velikosti \u010d\u00e1stic p\u0159izp\u016fsoben\u00e9 konkr\u00e9tn\u00edm aplikac\u00edm pomoc\u00ed r\u016fzn\u00fdch metod synt\u00e9zy, jako je Achesonovo sch\u00e9ma, uhl\u00edkov\u00e1 termick\u00e1 redukce a termick\u00fd rozklad kapaln\u00fdch polymer\u016f - ka\u017ed\u00e1 z nich vyu\u017e\u00edv\u00e1 energeticky n\u00e1ro\u010dn\u00e9 procesy zah\u0159\u00edv\u00e1n\u00ed, kter\u00e9 mus\u00ed dos\u00e1hnout reak\u010dn\u00edch teplot, aby se vytvo\u0159ily krystalizovan\u00e9 krystaly SiC, a teprve pot\u00e9 je t\u0159eba prov\u00e9st prom\u00fdv\u00e1n\u00ed kyselinou a su\u0161en\u00ed, aby mohla b\u00fdt v\u00fdroba dokon\u010dena a n\u00e1sledn\u011b vytvo\u0159ena jeho kone\u010dn\u00e1 forma.<\/p>\n
V\u00fdroba karbidu k\u0159em\u00edku za\u010d\u00edn\u00e1 sm\u00edch\u00e1n\u00edm pr\u00e1\u0161kov\u00e9ho koksu a k\u0159emene a n\u00e1sledn\u00fdm zah\u0159\u00edv\u00e1n\u00edm elektrick\u00fdm proudem p\u0159es grafitov\u00e9 j\u00e1dro, dokud nevznikne rafinovan\u00fd karbid k\u0159em\u00edku (SiC) - tento proces je zn\u00e1m\u00fd jako Acheson\u016fv proces.<\/p>\n
Po p\u0159\u00edprav\u011b surovin lze r\u016fzn\u00fdmi technikami z pr\u00e1\u0161ku vyrobit s\u00e1gary. Jakmile jsou tyto s\u00e1gary vytvo\u0159eny, proch\u00e1zej\u00ed n\u00e1sledn\u00fdm zpracov\u00e1n\u00edm, jako je mechanick\u00e9 obr\u00e1b\u011bn\u00ed a povrchov\u00e1 \u00faprava, kter\u00e9 zaji\u0161\u0165uj\u00ed jejich trvanlivost a odolnost v\u016f\u010di chemick\u00e9 korozi p\u0159i vy\u0161\u0161\u00edch teplot\u00e1ch.<\/p>\n
\u010cern\u00fd karbid k\u0159em\u00edku je d\u00edky sv\u00e9 v\u00fdjime\u010dn\u00e9 tvrdosti a vynikaj\u00edc\u00ed tepeln\u00e9 vodivosti st\u00e1le obl\u00edben\u011bj\u0161\u00edm materi\u00e1lem pro v\u00fdrobu brusn\u00fdch v\u00fdrobk\u016f, jako jsou brusn\u00e9 kotou\u010de a \u0159ezn\u00e9 n\u00e1stroje. D\u00e1le se tento materi\u00e1l vyskytuje v procesech v\u00fdroby polovodi\u010d\u016f a diod v elektronick\u00e9m pr\u016fmyslu a d\u00edky sv\u00e9 odolnosti v\u016f\u010di vysok\u00fdm teplot\u00e1m je vhodn\u00fd pro v\u00fdrobu \u017e\u00e1ruvzdorn\u00fdch materi\u00e1l\u016f pou\u017e\u00edvan\u00fdch v pec\u00edch, pec\u00edch, kel\u00edmc\u00edch ve stavebnictv\u00ed nebo metalurgii.<\/p>\n
Pr\u00e1\u0161ek karbidu k\u0159em\u00edku m\u00e1 vynikaj\u00edc\u00ed mechanick\u00e9 vlastnosti, d\u00edky nim\u017e je vhodn\u00fd pro vysokoteplotn\u00ed aplikace. D\u00edky sv\u00e9 tvrdosti a odolnosti proti opot\u0159eben\u00ed je vysoce odoln\u00fd proti opot\u0159eben\u00ed, zat\u00edmco jeho tepeln\u00e1 stabilita, chemick\u00e1 odolnost a elektrick\u00e1 vodivost jej rovn\u011b\u017e \u010din\u00ed velmi vyhled\u00e1van\u00fdm.<\/p>\n
V\u00fdroba tohoto materi\u00e1lu spo\u010d\u00edv\u00e1 v zah\u0159\u00edv\u00e1n\u00ed sm\u011bsi oxidu k\u0159emi\u010dit\u00e9ho a koksu p\u0159i velmi vysok\u00fdch teplot\u00e1ch ve speci\u00e1ln\u00ed peci, co\u017e vede k jejich reakci za vzniku velk\u00fdch krystal\u016f karbidu k\u0159em\u00edku.<\/p>\n
Jakmile je karbid k\u0159em\u00edku vytvo\u0159en, mus\u00ed b\u00fdt promyt, aby se odstranily ne\u010distoty, a pot\u00e9 vysu\u0161en r\u016fzn\u00fdmi technikami, jako je su\u0161en\u00ed hork\u00fdm vzduchem, vakuov\u00e9 su\u0161en\u00ed nebo su\u0161en\u00ed v mikrovlnn\u00e9 troub\u011b.<\/p>\n
Po vysu\u0161en\u00ed se karbid k\u0159em\u00edku drt\u00ed, t\u0159\u00edd\u00ed, znovu mele a zpracov\u00e1v\u00e1 pro konkr\u00e9tn\u00ed aplikace. Kone\u010dn\u00fdm v\u00fdsledkem je ingot, kter\u00fd lze n\u00e1sledn\u011b tvarovat podle individu\u00e1ln\u00edch specifikac\u00ed - v\u00fdrobci tento ingot pou\u017e\u00edvaj\u00ed nap\u0159\u00edklad pro v\u00fdrobu trysek ho\u0159\u00e1k\u016f - ned\u00edln\u00e9 sou\u010d\u00e1sti zaji\u0161\u0165uj\u00edc\u00ed maxim\u00e1ln\u00ed \u00fa\u010dinnost rozpra\u0161ov\u00e1n\u00ed paliva.<\/p>\n
Pr\u00e1\u0161kov\u00fd karbid k\u0159em\u00edku vynik\u00e1 v n\u00e1ro\u010dn\u00fdch v\u00fdrobn\u00edch prost\u0159ed\u00edch sv\u00fdmi p\u016fsobiv\u00fdmi vlastnostmi, jako je neuv\u011b\u0159iteln\u00e1 tvrdost, vynikaj\u00edc\u00ed tepeln\u00e1 vodivost a odolnost proti korozi. Proto se tento materi\u00e1l ji\u017e dlouho vyu\u017e\u00edv\u00e1 p\u0159i v\u00fdrob\u011b brusiva a elektroniky, v\u010detn\u011b \u0159ez\u00e1n\u00ed a le\u0161t\u011bn\u00ed kov\u016f nebo keramick\u00fdch dla\u017edic.<\/p>\n
D\u00edky sv\u00e9 mimo\u0159\u00e1dn\u00e9 hou\u017eevnatosti a ostrosti se diamant b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 v brusn\u00e9m pr\u016fmyslu k v\u00fdrob\u011b brusn\u00fdch kotou\u010d\u016f a \u0159ezn\u00fdch desek. V\u00fdrobci elektroniky se na n\u011bj rovn\u011b\u017e velmi spol\u00e9haj\u00ed d\u00edky jeho vynikaj\u00edc\u00ed tepeln\u00e9 vodivosti a odolnosti proti opot\u0159eben\u00ed.<\/p>\n
V\u00fdroba karbidu k\u0159em\u00edku m\u016f\u017ee prob\u00edhat ekologicky odpov\u011bdn\u00fdm zp\u016fsobem, s vyu\u017eit\u00edm obnoviteln\u00fdch zdroj\u016f energie a syst\u00e9m\u016f vyu\u017eit\u00ed odpadu, kter\u00e9 minimalizuj\u00ed emise sklen\u00edkov\u00fdch plyn\u016f. Pou\u017eit\u00edm t\u011bchto postup\u016f mohou v\u00fdrobci sn\u00ed\u017eit spot\u0159ebu energie a z\u00e1rove\u0148 sn\u00ed\u017eit provozn\u00ed n\u00e1klady, co\u017e je v dne\u0161n\u00ed dob\u011b rostouc\u00edch n\u00e1klad\u016f na energii obzvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"
Pr\u00e1\u0161ky karbidu k\u0159em\u00edku p\u0159in\u00e1\u0161ej\u00ed revoluci do vysokoteplotn\u00edch v\u00fdrobn\u00edch proces\u016f Brusiva z karbidu k\u0159em\u00edku (SiC) se dod\u00e1vaj\u00ed v r\u016fzn\u00fdch zrnitostech a \u010dasto se vyskytuj\u00ed jak v pojivu, tak v povlakovan\u00fdch brusivech. Zat\u00edmco SiC lze p\u0159irozen\u011b nal\u00e9zt v moissanitov\u00fdch \u0161perc\u00edch, v\u011bt\u0161ina v\u00fdroby SiC vyu\u017e\u00edv\u00e1 k v\u00fdrob\u011b bu\u010f Acheson\u016fv proces, nebo technologii chemick\u00e9ho napa\u0159ov\u00e1n\u00ed. \u017d\u00e1ruvzdornost, vysok\u00e1 tepeln\u00e1 vodivost a ... \u010c\u00edst d\u00e1l<\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-80","post","type-post","status-publish","format-standard","hentry","category-product"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/posts\/80","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/comments?post=80"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/posts\/80\/revisions"}],"predecessor-version":[{"id":81,"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/posts\/80\/revisions\/81"}],"wp:attachment":[{"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/media?parent=80"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/categories?post=80"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/cs\/wp-json\/wp\/v2\/tags?post=80"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}