Karbid krem\u00edka (SiC) je anorganick\u00e1 chemick\u00e1 zl\u00fa\u010denina z oxidu kremi\u010dit\u00e9ho a uhl\u00edka, ktor\u00e1 sa za\u010dala komer\u010dne masovo vyr\u00e1ba\u0165 v roku 1893 na pou\u017eitie ako abraz\u00edvny materi\u00e1l. Hoci SiC existuje v pr\u00edrode ako miner\u00e1l moissanit, masov\u00e1 v\u00fdroba sa za\u010dala po tomto d\u00e1tume na pou\u017eitie vo forme pr\u00e1\u0161ku a kry\u0161t\u00e1lov na masov\u00fa spotrebu vo v\u00fdrobkoch na br\u00fasenie.<\/p>\n
Keramick\u00fd materi\u00e1l Cerakote je jedn\u00fdm z najtvrd\u0161\u00edch a naj\u013eah\u0161\u00edch keramick\u00fdch materi\u00e1lov, ktor\u00fd sa vyzna\u010duje vynikaj\u00facou odolnos\u0165ou proti kor\u00f3zii, oderu a er\u00f3zii, ako aj extr\u00e9mnym teplot\u00e1m.<\/p>\n
Karbid krem\u00edka (SiC) je mimoriadne tvrd\u00fd a pru\u017en\u00fd materi\u00e1l s vysokou odolnos\u0165ou proti kor\u00f3zii a tepelnou roz\u0165a\u017enos\u0165ou, odoln\u00fd vo\u010di kyselin\u00e1m a l\u00fahom a z\u00e1rove\u0148 sl\u00fa\u017ei ako elektrick\u00fd izolant.<\/p>\n
Na Zemi sa SiC vyskytuje hojne ako miner\u00e1l moissanit, vo vesm\u00edre ako hviezdny prach z hviezd bohat\u00fdch na uhl\u00edk. SiC nach\u00e1dza \u0161irok\u00e9 uplatnenie v r\u00f4znych priemyseln\u00fdch odvetviach vr\u00e1tane chemickej v\u00fdroby, v\u00fdroby papiera a komponentov pre \u010derpadl\u00e1 a pohonn\u00e9 syst\u00e9my. Okrem toho ho dynamick\u00e9 tesniace technol\u00f3gie vyu\u017e\u00edvaj\u00face trecie lo\u017eisk\u00e1 alebo mechanick\u00e9 tesnenia \u010dasto uprednost\u0148uj\u00fa pred kovov\u00fdmi n\u00e1protivkami pre ich vy\u0161\u0161iu spo\u013eahlivos\u0165 v n\u00e1ro\u010dn\u00fdch podmienkach.<\/p>\n
Alfa karbid krem\u00edka (a-SiC) s hexagon\u00e1lnou kry\u0161t\u00e1lovou \u0161trukt\u00farou podobnou wurtzitu je najpou\u017e\u00edvanej\u0161\u00edm typom. Hoci je k dispoz\u00edcii beta a-SiC s kry\u0161t\u00e1lovou \u0161trukt\u00farou zinku blende, jeho komer\u010dn\u00e9 vyu\u017eitie je st\u00e1le obmedzen\u00e9.<\/p>\n
V\u0161estrannos\u0165 karbidu krem\u00edka ako materi\u00e1lu vypl\u00fdva predov\u0161etk\u00fdm z jeho vynikaj\u00facich tepeln\u00fdch vlastnost\u00ed vr\u00e1tane vysokej tepelnej vodivosti, n\u00edzkej tepelnej roz\u0165a\u017enosti a vysok\u00e9ho bodu topenia, v\u010faka ktor\u00fdm je vhodn\u00fd pre aplik\u00e1cie v letectve, energetick\u00fdch technol\u00f3gi\u00e1ch a chemickej v\u00fdrobe.<\/p>\n
Tento materi\u00e1l sa vyzna\u010duje vynikaj\u00facou odolnos\u0165ou proti kor\u00f3zii vr\u00e1tane odolnosti vo\u010di kyselin\u00e1m a z\u00e1sad\u00e1m, ako aj teplot\u00e1m do 1600 \u00b0C. Preto je ide\u00e1lnou vo\u013ebou pre lo\u017eisk\u00e1, d\u00fdzy, s\u00fa\u010dasti spa\u013eovac\u00edch motorov a diely elektrick\u00fdch vozidiel, ktor\u00e9 musia odol\u00e1va\u0165 siln\u00fdm tepeln\u00fdm \u0161okom bez toho, aby praskli alebo sa rozpadli.<\/p>\n
American Elements pon\u00faka \u0161irok\u00fd v\u00fdber \u0161tandardn\u00fdch a z\u00e1kazkov\u00fdch materi\u00e1lov pre polovodi\u010dov\u00fd, leteck\u00fd, automobilov\u00fd a obrann\u00fd priemysel, elektroniku, osvetlenie a papierensk\u00fd priemysel. Vzorky s\u00fa k dispoz\u00edcii na \u00fa\u010dely v\u00fdskumu a kontroly kvality, pri\u010dom sa pon\u00faka aj makro a mikro zrnitos\u0165. A-SiC spolo\u010dnosti American Elements je chemicky \u010dist\u00fd s vysokou objemovou hustotou, zatia\u013e \u010do n\u00e1\u0161 proces chemick\u00e9ho \u010distenia ho preosieva tak, aby sp\u013a\u0148al \u0161pecifick\u00e9 ve\u013ekosti FEPA, ako aj normy ACS Reagent Grade.<\/p>\n
Karbid krem\u00edka sa napriek svojej relat\u00edvne n\u00edzkej hustote (3,2 g\/cm3) vyzna\u010duje vynikaj\u00facou obrobite\u013enos\u0165ou a elektrickou vodivos\u0165ou, ako aj odolnos\u0165ou vo\u010di v\u00e4\u010d\u0161ine kysel\u00edn, sol\u00ed a z\u00e1sad.<\/p>\n
GaN ako polovodi\u010d so \u0161irok\u00fdm p\u00e1smov\u00fdm rozp\u00e4t\u00edm vykazuje vysok\u00fa tepeln\u00fa vodivos\u0165 a prierazn\u00fa silu elektrick\u00e9ho po\u013ea, ako aj vynikaj\u00faci izolant.<\/p>\n
Polytypy SiC sa v\u00fdrazne l\u00ed\u0161ia vo svojich z\u00e1kladn\u00fdch elektrick\u00fdch vlastnostiach v d\u00f4sledku usporiadania at\u00f3mov v ich kry\u0161t\u00e1lovej mrie\u017eke, pri\u010dom ka\u017ed\u00fd z nich pon\u00faka \u0161pecifick\u00e9 v\u00fdhody a nev\u00fdhody v porovnan\u00ed s krem\u00edkom v troch k\u013e\u00fa\u010dov\u00fdch kateg\u00f3ri\u00e1ch - tepeln\u00e1 vodivos\u0165, prierazn\u00e1 sila elektrick\u00e9ho po\u013ea a energetick\u00fd p\u00e1sov\u00fd odstup.<\/p>\n
SiC sa dod\u00e1va v nieko\u013ek\u00fdch form\u00e1ch. Alfa formy maj\u00fa hexagon\u00e1lnu kry\u0161t\u00e1lov\u00fa \u0161trukt\u00faru podobn\u00fa wurtzitu, zatia\u013e \u010do beta formy maj\u00fa kry\u0161t\u00e1lov\u00fa \u0161trukt\u00faru zinkov\u00e9ho blende a m\u00f4\u017eu sl\u00fa\u017ei\u0165 aj ako nosi\u010de katalyz\u00e1torov. Pomocou spekania v iskrovej plazme bol vytvoren\u00fd nestechiometrick\u00fd SiC obsahuj\u00faci pr\u00eddavky C a Si od 1-5mol%, ktor\u00fd vykazoval konzistentn\u00fa mikro\u0161trukt\u00faru s n\u00edzkym elektrick\u00fdm odporom; jeho Seebeckov koeficient sa menil z n-typu na p-typ s rast\u00facim mno\u017estvom C, \u010do nazna\u010duje, \u017ee medzi C a Si sa vytvorili pevn\u00e9 roztoky v r\u00e1mci jeho mrie\u017ekovej \u0161trukt\u00fary.<\/p>\n
Karbid krem\u00edka sa v porovnan\u00ed s v\u00e4\u010d\u0161inou technickej keramiky vyzna\u010duje vynikaj\u00facou tvrdos\u0165ou, \u0165a\u017enos\u0165ou a odolnos\u0165ou vo\u010di kor\u00f3zii a chemick\u00fdm vplyvom. Ako jedna z najtvrd\u0161\u00edch dostupn\u00fdch technick\u00fdch keram\u00edk odol\u00e1va vysok\u00fdm teplot\u00e1m a mechanick\u00e9mu nam\u00e1haniu, ako aj dobrej rozmerovej stabilite v\u010faka vysokej hodnote Youngovho modulu.<\/p>\n
Hlin\u00edk je jedn\u00fdm z najstabilnej\u0161\u00edch materi\u00e1lov vo\u010di n\u00e1razom a vibr\u00e1ci\u00e1m, v\u010faka \u010domu je vhodn\u00fdm materi\u00e1lom pre vysoko v\u00fdkonn\u00e9 aplik\u00e1cie, ako s\u00fa br\u00fasne materi\u00e1ly a in\u00e9 high-tech aplik\u00e1cie. Okrem toho je v\u010faka svojej tepelnej vodivosti, n\u00edzkemu koeficientu roz\u0165a\u017enosti a odolnosti vo\u010di kyselin\u00e1m a l\u00fahom vynikaj\u00facou vo\u013ebou.<\/p>\n
Spolo\u010dnos\u0165 American Elements pon\u00faka v\u00fdber pr\u00e1\u0161kov\u00fdch produktov z karbidu krem\u00edka vysokej \u010distoty vyroben\u00fdch pod\u013ea pr\u00edsnych priemyseln\u00fdch a aplika\u010dn\u00fdch noriem na pou\u017eitie v mnoh\u00fdch priemyseln\u00fdch odvetviach a aplik\u00e1ci\u00e1ch, ako napr\u00edklad Mil Spec (vojensk\u00e1 trieda), ACS Reagent Grade Technical Grade Food Pharmaceutical Grade a USP\/BP Obalov\u00e9 rie\u0161enia s\u00fa tie\u017e k dispoz\u00edcii - pre viac inform\u00e1ci\u00ed sa obr\u00e1\u0165te na n\u00e1\u0161 t\u00edm; v\u0161etky triedy sp\u013a\u0148aj\u00fa platn\u00e9 testovacie normy ASTM, pri\u010dom pod\u013ea potreby s\u00fa k dispoz\u00edcii vlastn\u00e9 obaly - typick\u00e9 a vlastn\u00e9 obaly s\u00fa k dispoz\u00edcii na po\u017eiadanie - obr\u00e1\u0165te sa na n\u00e1s, preto\u017ee spolo\u010dnos\u0165 American Elements sa sna\u017e\u00ed pon\u00faka\u0165 z\u00e1kazn\u00edkom kvalitn\u00e9 produkty a z\u00e1rove\u0148 poskytova\u0165 bezkonkuren\u010dn\u00fd z\u00e1kazn\u00edcky servis!<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide (SiC) is an inorganic chemical compound made of silica and carbon that was first mass produced commercially since […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","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":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-76","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/76","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/comments?post=76"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/76\/revisions"}],"predecessor-version":[{"id":77,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/76\/revisions\/77"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/media?parent=76"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/categories?post=76"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/tags?post=76"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}