Karbid k\u0159em\u00edku nab\u00edz\u00ed n\u011bkolik v\u00fdhod, kter\u00e9 z n\u011bj \u010din\u00ed atraktivn\u00ed alternativu k za\u0159\u00edzen\u00edm na b\u00e1zi k\u0159em\u00edku, v\u010detn\u011b jeho schopnosti zpracov\u00e1vat vysok\u00e1 nap\u011bt\u00ed, zvy\u0161ovat tepelnou \u00fa\u010dinnost a sni\u017eovat velikost\/hmotnost v\u00fdkonov\u00fdch elektronick\u00fdch za\u0159\u00edzen\u00ed v elektrick\u00fdch vozidlech.<\/p>\n
SiC se p\u0159irozen\u011b vyskytuje v drahokamech moissanitu a v lo\u017eisc\u00edch kimberlitu, ale v\u011bt\u0161ina se vyr\u00e1b\u00ed synteticky pro pou\u017eit\u00ed v elektronick\u00fdch sou\u010d\u00e1stk\u00e1ch, zdroj\u00edch energie a jadern\u00fdch reaktorech.<\/p>\n
Karbid k\u0159em\u00edku (SiC) je pr\u016fkopnick\u00fd polovodi\u010dov\u00fd materi\u00e1l s extr\u00e9mn\u011b \u0161irok\u00fdm p\u00e1smov\u00fdm rozp\u011bt\u00edm, kter\u00fd umo\u017e\u0148uje za\u0159\u00edzen\u00edm SiC zpracov\u00e1vat vy\u0161\u0161\u00ed nap\u011bt\u00ed a proudy ne\u017e jejich prot\u011bj\u0161ky na b\u00e1zi k\u0159em\u00edku, co\u017e je \u010din\u00ed vhodn\u00fdmi pro v\u00fdkonovou elektroniku, jako jsou trak\u010dn\u00ed m\u011bni\u010de pro elektrick\u00e1 vozidla a zdroje nep\u0159eru\u0161ovan\u00e9ho nap\u00e1jen\u00ed.<\/p>\n
Polovodi\u010de jsou materi\u00e1ly, kter\u00e9 se st\u0159\u00eddav\u011b chovaj\u00ed jako vodi\u010de (jako m\u011bd\u011bn\u00e9 elektrick\u00e9 veden\u00ed) a izol\u00e1tory (jako polymerov\u00e1 izolace tohoto veden\u00ed). P\u00e1sov\u00e1 propast polovodi\u010d\u016f je energetick\u00e1 bari\u00e9ra mezi jejich valen\u010dn\u00edm p\u00e1sem ( valen\u010dn\u00ed p\u00e1s ) a vodivostn\u00edm p\u00e1sem ( vodivostn\u00ed p\u00e1s ). P\u00e1sov\u00e1 propust umo\u017e\u0148uje polovodi\u010dov\u00fdm za\u0159\u00edzen\u00edm zap\u00ednat nebo vyp\u00ednat proud podle po\u017eadavk\u016f obvod\u016f.<\/p>\n
\u0160\u00ed\u0159ka p\u00e1su z\u00e1vis\u00ed na velikosti a s\u00edle atomov\u00fdch vazeb v materi\u00e1lech a tak\u00e9 na teplot\u011b. \u0160ir\u0161\u00ed p\u00e1sov\u00e1 mezera vy\u017eaduje k excitaci nosi\u010d\u016f v\u011bt\u0161\u00ed elektrick\u00e9 pole, a proto je vhodn\u00e1 pro vysokonap\u011b\u0165ov\u00e9 aplikace. \u0160irokop\u00e1smov\u00e9 materi\u00e1ly tak\u00e9 vykazuj\u00ed ni\u017e\u0161\u00ed ztr\u00e1ty p\u0159i veden\u00ed ne\u017e k\u0159em\u00edkov\u00e9 prot\u011bj\u0161ky.<\/p>\n
Podle americk\u00e9ho ministerstva energetiky se \u0161irokop\u00e1smov\u00e9 polovodi\u010de stanou ned\u00edlnou sou\u010d\u00e1st\u00ed syst\u00e9m\u016f obnoviteln\u00fdch zdroj\u016f energie, jako jsou sol\u00e1rn\u00ed a v\u011btrn\u00e9 elektr\u00e1rny. \u0160irokop\u00e1smov\u00e9 polovodi\u010de nav\u00edc pomohou usnadnit rychlej\u0161\u00ed zav\u00e1d\u011bn\u00ed elektromobil\u016f, snadn\u011bji digitalizovat procesy v energetice, v\u00fdrazn\u011bji sn\u00ed\u017eit n\u00e1klady na \u017eivotn\u00ed cyklus, u\u010dinit v\u00fdkonovou elektroniku WBG men\u0161\u00ed, rychlej\u0161\u00ed a spolehliv\u011bj\u0161\u00ed, n\u00e1kladov\u011b efektivn\u011bj\u0161\u00ed ne\u017e jej\u00ed prot\u011bj\u0161ky na b\u00e1zi k\u0159em\u00edku a nab\u00eddnout n\u011bkolik dal\u0161\u00edch potenci\u00e1ln\u00edch v\u00fdhod, kter\u00e9 z v\u00fdkonov\u00e9 elektroniky WBG \u010din\u00ed atraktivn\u00ed alternativu k v\u00fdkonov\u00e9 elektronice na b\u00e1zi k\u0159em\u00edku.<\/p>\n
V\u00fdkonov\u00e9 polovodi\u010dov\u00e9 sou\u010d\u00e1stky z karbidu k\u0159em\u00edku prok\u00e1zaly svou odolnost p\u0159i vy\u0161\u0161\u00edch nap\u011bt\u00edch, ni\u017e\u0161\u00edch teplot\u00e1ch a del\u0161\u00ed \u017eivotnost ne\u017e jejich k\u0159em\u00edkov\u00e9 (Si) prot\u011bj\u0161ky. Krom\u011b toho lze SiC za\u0159\u00edzen\u00ed spojovat do men\u0161\u00edch nap\u00e1jec\u00edch zdroj\u016f s vy\u0161\u0161\u00ed hustotou v\u00fdkonu, co\u017e z nich \u010din\u00ed ide\u00e1ln\u00ed volbu pro v\u00fdkonovou elektroniku, kter\u00e1 spojuje n\u00e1\u0161 sv\u011bt dnes i v budoucnosti.<\/p>\n
Polovodi\u010de z karbidu k\u0159em\u00edku se vyzna\u010duj\u00ed \u0161irok\u00fdmi p\u00e1smov\u00fdmi mezerami, kter\u00e9 jim umo\u017e\u0148uj\u00ed p\u0159en\u00e1\u0161et elektrickou energii efektivn\u011bji ne\u017e tradi\u010dn\u00ed k\u0159em\u00edkov\u00e9 sou\u010d\u00e1stky, rychleji p\u0159ep\u00ednat mezi vodi\u010di a izol\u00e1tory a minimalizovat sp\u00ednac\u00ed ztr\u00e1ty, co\u017e vede k rychlej\u0161\u00ed konverzi elektrick\u00e9 energie, ni\u017e\u0161\u00edm n\u00e1klad\u016fm na energii a men\u0161\u00edm ztr\u00e1t\u00e1m p\u0159i konverzi - d\u00edky tomu jsou ide\u00e1ln\u00ed pro pou\u017eit\u00ed v nap\u00e1jec\u00edch zdroj\u00edch datov\u00fdch center, modulech v\u011btrn\u00e9\/sol\u00e1rn\u00ed energie a m\u011bni\u010d\u00edch pohonu elektrick\u00fdch vozidel.<\/p>\n
S rostouc\u00ed popt\u00e1vkou po obnoviteln\u00fdch zdroj\u00edch energie roste i pot\u0159eba spolehliv\u00fdch zdroj\u016f energie. K\u0159em\u00edkov\u00e9 polovodi\u010dov\u00e9 zdroje nab\u00edzej\u00ed \u00faspory energie a z\u00e1rove\u0148 zvy\u0161uj\u00ed \u00fa\u010dinnost syst\u00e9m\u016f obnoviteln\u00e9 energie d\u00edky vysok\u00e9 sp\u00ednac\u00ed frekvenci a teplotn\u00edm mo\u017enostem.<\/p>\n
Bez ohledu na to, zda se jedn\u00e1 o pr\u016fmyslov\u00e9 aplikace nebo technologie nap\u00e1jen\u00e9 z bateri\u00ed, spole\u010dnost Wolfspeed poskytuje pokro\u010dil\u00e1 v\u00fdkonov\u00e1 polovodi\u010dov\u00e1 \u0159e\u0161en\u00ed navr\u017een\u00e1 a vyroben\u00e1 pomoc\u00ed technologie SiC - \u00fazce spolupracuje s Astrodyne TDI na inovativn\u00edch n\u00e1vrz\u00edch i pro ty nejn\u00e1ro\u010dn\u011bj\u0161\u00ed aplikace.<\/p>\n
Polovodi\u010de z karbidu k\u0159em\u00edku maj\u00ed vy\u0161\u0161\u00ed blokovac\u00ed nap\u011bt\u00ed ne\u017e jejich k\u0159em\u00edkov\u00e9 prot\u011bj\u0161ky, tak\u017ee l\u00e9pe zvl\u00e1daj\u00ed v\u011bt\u0161\u00ed proudov\u00e9 toky a sp\u00ednac\u00ed ztr\u00e1ty, \u010d\u00edm\u017e zvy\u0161uj\u00ed \u00fa\u010dinnost p\u0159em\u011bny energie a jsou vhodn\u00e9 pro vysokonap\u011b\u0165ov\u00e9 aplikace, jako jsou trak\u010dn\u00ed m\u011bni\u010de v elektrick\u00fdch vozidlech.<\/p>\n
Karbid k\u0159em\u00edku se od standardn\u00edch k\u0159em\u00edkov\u00fdch polovodi\u010d\u016f li\u0161\u00ed t\u00edm, \u017ee m\u00e1 \u0161ir\u0161\u00ed p\u00e1sovou mezeru ne\u017e jin\u00e9 materi\u00e1ly, nap\u0159\u00edklad nitrid galia (GaN). \u0160ir\u0161\u00ed p\u00e1sov\u00e1 mezera umo\u017e\u0148uje SiC efektivn\u011bji p\u0159en\u00e1\u0161et elektrickou energii - je ide\u00e1ln\u00ed pro vysokonap\u011b\u0165ov\u00e9 aplikace, proto\u017ee odol\u00e1v\u00e1 i vysok\u00fdm teplot\u00e1m a z\u00e1\u0159en\u00ed.<\/p>\n
Karbid k\u0159em\u00edku se m\u016f\u017ee pochlubit extr\u00e9mn\u011b n\u00edzk\u00fdm zap\u00ednac\u00edm odporem, kter\u00fd se zap\u00edn\u00e1 a vyp\u00edn\u00e1 za m\u00e9n\u011b ne\u017e 10 nanosekund, co\u017e je neoceniteln\u00e1 vlastnost pro vysokorychlostn\u00ed aplikace, proto\u017ee sni\u017euje energetick\u00e9 ztr\u00e1ty a z\u00e1rove\u0148 urychluje provoz. Karbid k\u0159em\u00edku m\u00e1 nav\u00edc n\u00edzkou teplotn\u00ed z\u00e1vislost, co\u017e mu umo\u017e\u0148uje pracovat p\u0159i vy\u0161\u0161\u00edch teplot\u00e1ch ne\u017e tradi\u010dn\u00ed polovodi\u010de.<\/p>\n
Karbid k\u0159em\u00edku se od tradi\u010dn\u00edch polovodi\u010dov\u00fdch materi\u00e1l\u016f li\u0161\u00ed t\u00edm, \u017ee m\u00e1 mnohem ni\u017e\u0161\u00ed teplotu t\u00e1n\u00ed a je vysoce odoln\u00fd v\u016f\u010di korozi zp\u016fsoben\u00e9 solemi a kyselinami, tak\u017ee je ide\u00e1ln\u00ed pro drsn\u00e1 prost\u0159ed\u00ed, jako jsou n\u00e1mo\u0159n\u00ed aplikace. V\u00fdhody karbidu k\u0159em\u00edku vedly k jeho rostouc\u00edmu vyu\u017eit\u00ed v elektronick\u00fdch za\u0159\u00edzen\u00edch, proto\u017ee m\u00e1 potenci\u00e1l prodlou\u017eit dojezdov\u00e9 vzd\u00e1lenosti d\u00edky vy\u0161\u0161\u00ed \u00fa\u010dinnosti trak\u010dn\u00edch m\u011bni\u010d\u016f - jeden z d\u016fvod\u016f, pro\u010d by mohl dokonce prodlou\u017eit dojezdov\u00e9 vzd\u00e1lenosti elektromobil\u016f!<\/p>\n
Karbid k\u0159em\u00edku (SiC) je anorganick\u00e1 chemick\u00e1 slou\u010denina slo\u017een\u00e1 z k\u0159em\u00edku a uhl\u00edku. P\u0159irozen\u011b se vyskytuje jako drahokam moissanit a masov\u011b se vyr\u00e1b\u00ed jako pr\u00e1\u0161ek nebo jednotliv\u00e9 krystaly pro pou\u017eit\u00ed jako brusivo. SiC se tak\u00e9 nach\u00e1z\u00ed v nepr\u016fst\u0159eln\u00fdch vest\u00e1ch; po dopov\u00e1n\u00ed hlin\u00edkem, borem, heliem nebo dus\u00edkem se za\u010dne chovat v\u00edce jako polovodi\u010dov\u00fd materi\u00e1l; vytv\u00e1\u0159\u00ed polovodi\u010dov\u00e9 oblasti typu P nebo N pot\u0159ebn\u00e9 pro v\u00fdrobu za\u0159\u00edzen\u00ed.<\/p>\n
Spolehlivost SiC je kl\u00ed\u010dov\u00fdm aspektem pro jeho pou\u017eit\u00ed jako v\u00fdkonov\u00e9ho za\u0159\u00edzen\u00ed se \u0161irok\u00fdm p\u00e1smem ve vysoce v\u00fdkonn\u00fdch aplikac\u00edch, na rozd\u00edl od jeho b\u011b\u017en\u011bj\u0161\u00edho p\u0159edch\u016fdce k\u0159em\u00edku. SiC nab\u00edz\u00ed vy\u0161\u0161\u00ed nap\u011bt\u00ed, sp\u00ednac\u00ed frekvence a ni\u017e\u0161\u00ed parazitn\u00ed efekty ne\u017e k\u0159em\u00edk, av\u0161ak p\u0159i posuzov\u00e1n\u00ed jeho spolehlivosti je t\u0159eba br\u00e1t v \u00favahu ur\u010dit\u00e9 d\u016fle\u017eit\u00e9 aspekty.<\/p>\n
Testov\u00e1n\u00ed spolehlivosti a modely p\u0159edpov\u011bdi \u017eivotnosti jsou z\u00e1sadn\u00edmi n\u00e1stroji pro odhad o\u010dek\u00e1van\u00e9 \u017eivotnosti v\u00fdkonov\u00fdch za\u0159\u00edzen\u00ed z karbidu k\u0159em\u00edku. C\u00edlem pr\u016fmyslov\u00fdch test\u016f je obvykle co nejd\u00e9le p\u0159ekra\u010dovat jejich maxim\u00e1ln\u00ed jmenovit\u00e9 nap\u011bt\u00ed nebo proud, co\u017e je nadm\u011brn\u011b zat\u011b\u017euje a vede k opot\u0159eben\u00ed, kter\u00e9 poskytuje \u00fadaje pro p\u0159edpov\u011b\u010f st\u0159edn\u00ed doby do poruchy (MTTF).<\/p>\n
V\u00fdrobci mus\u00ed tak\u00e9 v\u011bnovat velkou pozornost kosmick\u00e9mu z\u00e1\u0159en\u00ed, kter\u00e9 m\u016f\u017ee zp\u016fsobit po\u0161kozen\u00ed oxidov\u00fdch vrstev v\u00fdkonov\u00fdch za\u0159\u00edzen\u00ed koroz\u00ed. To je zvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00e9 v leteck\u00e9m pr\u016fmyslu, kde m\u016f\u017ee \u00farove\u0148 z\u00e1\u0159en\u00ed dosahovat a\u017e trojn\u00e1sobku \u00farovn\u011b pozorovan\u00e9 v b\u011b\u017en\u00fdch pr\u016fmyslov\u00fdch v\u00fd\u0161k\u00e1ch.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide semiconductor offers several advantages that make it an attractive alternative to silicon-based devices, including its ability to handle high voltages, enhance thermal efficiency and decrease size\/weight of power electronic devices in electric vehicles. SiC is found naturally in moissanite gems and kimberlite deposits, but most is produced synthetically for use in electronic components, […]<\/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":""}},"footnotes":""},"categories":[64],"tags":[],"class_list":["post-310","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/posts\/310","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/comments?post=310"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/posts\/310\/revisions"}],"predecessor-version":[{"id":311,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/posts\/310\/revisions\/311"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/media?parent=310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/categories?post=310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/tags?post=310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}