A szil\u00edciumkarbid, vagy SiC, egy rendk\u00edv\u00fcl er\u0151s \u00e9s tart\u00f3s anyag, amely egyed\u00fcl\u00e1ll\u00f3 elektromos tulajdons\u00e1gokkal rendelkezik.<\/p>\n
A krist\u00e1lyos sz\u00e9n s\u0171r\u0171n csomagolt, kovalens k\u00f6t\u00e9s\u0171 strukt\u00far\u00e1kban krist\u00e1lyosodik. Atomjai k\u00e9t els\u0151dleges koordin\u00e1ci\u00f3s tetra\u00e9dert alkotnak, amelyeknek minden sark\u00e1ban n\u00e9gy sz\u00e9n- \u00e9s n\u00e9gy szil\u00edciumatom tal\u00e1lhat\u00f3, amelyek a sarkaikon kereszt\u00fcl kapcsol\u00f3dnak \u00f6ssze, \u00e9s \u00edgy t\u00f6bbt\u00edpus\u00fa strukt\u00far\u00e1kat, \u00fagynevezett polyt\u00edpusokat alkotnak.<\/p>\n
A szil\u00edciumkarbid rendk\u00edv\u00fcl kem\u00e9ny anyag, Mohs-kem\u00e9nys\u00e9ge 9 \u00e9s 10 k\u00f6z\u00f6tti, valahol a timf\u00f6ld \u00e9s a gy\u00e9m\u00e1nt k\u00f6z\u00f6tt helyezkedik el. A szil\u00edciumkarbidot sz\u00e9les k\u00f6rben haszn\u00e1lj\u00e1k csiszol\u00f3anyagk\u00e9nt a modern lapid\u00e1riumban, csiszol\u00e1si \u00e9s megmunk\u00e1l\u00e1si m\u0171veletekben, ipari kemenc\u00e9k t\u0171z\u00e1ll\u00f3 b\u00e9l\u00e9sek\u00e9nt, v\u00e1g\u00f3szersz\u00e1mokban, szivatty\u00fak \u00e9s rak\u00e9tahajt\u00f3m\u0171vek kop\u00e1s\u00e1ll\u00f3 alkatr\u00e9szeik\u00e9nt, valamint g\u00f6rdeszk\u00e1k kop\u00e1s\u00e1ll\u00f3 tapad\u00f3szalagjak\u00e9nt, tov\u00e1bb\u00e1 a karborundum-nyomd\u00e1ban - a karborundumszemcs\u00e9k alum\u00edniumlemezre t\u00f6rt\u00e9n\u0151 felhord\u00e1sa, majd g\u00f6rd\u00fcl\u0151\u00e1gyas nyomd\u00e1k seg\u00edts\u00e9g\u00e9vel t\u00f6rt\u00e9n\u0151 pap\u00edrra nyomtat\u00e1sa (Mountain).<\/p>\n
A szintetikus polikarbon\u00e1tok szintetikusan el\u0151\u00e1ll\u00edthat\u00f3k reakci\u00f3k\u00f6t\u00e9si vagy szinterel\u00e9si elj\u00e1r\u00e1ssal, az ut\u00f3bbit 0,5% sz\u00e9n vagy 0,5% b\u00f3r szinterel\u00e9si seg\u00e9danyagk\u00e9nt t\u00f6rt\u00e9n\u0151 hozz\u00e1ad\u00e1s\u00e1val jav\u00edtva, a fel\u00fcleti diff\u00fazi\u00f3 megakad\u00e1lyoz\u00e1sa \u00e9s a szemcsehat\u00e1rok energi\u00e1j\u00e1nak m\u00f3dos\u00edt\u00e1sa \u00e9rdek\u00e9ben (Mountain).<\/p>\n
A SiC egy leny\u0171g\u00f6z\u0151 ipari ker\u00e1mia, amely v\u00e1ltozatos mechanikai tulajdons\u00e1gokkal rendelkezik, ami felbecs\u00fclhetetlen \u00e9rt\u00e9k\u0171v\u00e9 teszi a k\u00fcl\u00f6nb\u00f6z\u0151 ipari k\u00f6rnyezetekben. Nagy h\u0151vezet\u0151 k\u00e9pess\u00e9g\u00e9nek \u00e9s alacsony h\u0151t\u00e1gul\u00e1si sebess\u00e9g\u00e9nek k\u00f6sz\u00f6nhet\u0151en a f\u00f6ldi elektromos j\u00e1rm\u0171vek meghajt\u00f3rendszereinek teljes\u00edtm\u00e9nyelektronik\u00e1j\u00e1ban val\u00f3 felhaszn\u00e1l\u00e1sa minden eddigin\u00e9l elterjedtebb\u00e9 v\u00e1lt. Tov\u00e1bb\u00e1 a SiC elektromos jellemz\u0151i a hagyom\u00e1nyos szil\u00edcium f\u00e9lvezet\u0151ket is helyettes\u00edthetik a nagyobb fesz\u00fclts\u00e9g\u0171 alkalmaz\u00e1sokban, p\u00e9ld\u00e1ul az elektromos j\u00e1rm\u0171vek vontat\u00e1si invertereiben \u00e9s a t\u00f6lt\u0151\u00e1llom\u00e1sok DC\/DC \u00e1talak\u00edt\u00f3iban.<\/p>\n
A szil\u00edcium-karbidot nitrog\u00e9nnel \u00e9s foszforral adal\u00e9kolva n-t\u00edpus\u00fa f\u00e9lvezet\u0151k, m\u00edg berilliummal, b\u00f3rral, alum\u00edniummal \u00e9s galliummal adal\u00e9kolva p-t\u00edpus\u00fa f\u00e9lvezet\u0151k hozhat\u00f3k l\u00e9tre. A szil\u00edciumkarbid szoros \u00e9s szimmetrikus szerkezete miatt ide\u00e1lis platformot biztos\u00edt az adal\u00e9kol\u00e1shoz.<\/p>\n
A t\u0171z\u00e1ll\u00f3 anyag kem\u00e9ny, rideg \u00e9s h\u0151vezet\u0151. Ellen\u00e1ll a magas h\u0151m\u00e9rs\u00e9kleteknek \u00e9s fesz\u00fclts\u00e9geknek, m\u00edg alacsony h\u0151t\u00e1gul\u00e1si egy\u00fctthat\u00f3ja el\u0151ny\u00f6s a h\u0151m\u00e9rs\u00e9klet-ingadoz\u00e1soknak kitett alkalmaz\u00e1sokban.<\/p>\n
B\u00e1r a term\u00e9szetes moissanit (Csi3SiO6) megtal\u00e1lhat\u00f3 a meteoritokban \u00e9s a kimberlitben, a legt\u00f6bb ma \u00e9rt\u00e9kes\u00edtett szil\u00edciumkarbid szintetikus. Sokf\u00e9le form\u00e1ban l\u00e9tezik, a z\u00f6ldt\u0151l a fekete krist\u00e1lyos szemcs\u00e9kig \u00e9s a teljes\u00edtm\u00e9nyelektronikai alkalmaz\u00e1sokban haszn\u00e1lt hat h\u00fcvelykes SiC-lapk\u00e1kig, \u00e9s k\u00e9miailag inert, mivel ellen\u00e1ll a szerves savak \u00e9s l\u00fagok okozta korr\u00f3zi\u00f3nak, kiv\u00e9ve a fluorvizet \u00e9s a k\u00e9nsavat; v\u00edzben vagy m\u00e1s old\u00f3szerekben nem old\u00f3dik, de olvasztott l\u00fagokban, p\u00e9ld\u00e1ul NaOH-ban vagy KOH-ban old\u00f3dik.<\/p>\n
A szil\u00edciumkarbid (SiC) f\u00e9lvezet\u0151 anyag, amely a f\u00e9mek (amelyek vezetik az elektromoss\u00e1got) \u00e9s a szigetel\u0151k (amelyek nem vezetik az elektromoss\u00e1got) k\u00f6z\u00f6tt helyezkedik el. A SiC elektromos tulajdons\u00e1gai a h\u0151m\u00e9rs\u00e9klett\u0151l \u00e9s az \u00f6sszet\u00e9tel\u00e9ben l\u00e9v\u0151 szennyez\u0151d\u00e9sekt\u0151l f\u00fcggenek: alacsony h\u0151m\u00e9rs\u00e9kleten szigetel\u0151k\u00e9nt viselkedik, m\u00edg magasabb h\u0151m\u00e9rs\u00e9kleten a vezet\u0151k\u00e9pess\u00e9ge \u00e9szrevehet\u0151v\u00e9 v\u00e1lik. A SiC vezet\u0151k\u00e9pess\u00e9ge tov\u00e1bb jav\u00edthat\u00f3 alum\u00ednium, b\u00f3r vagy gallium szennyez\u0151d\u00e9sek hozz\u00e1ad\u00e1s\u00e1val, amelyek n\u00f6velik a szabad t\u00f6lt\u00e9shordoz\u00f3kat \u00e9s a SiC-t P-t\u00edpus\u00fa f\u00e9lvezet\u0151v\u00e9 alak\u00edtj\u00e1k.<\/p>\n
Az agyag fizikai \u00e9s k\u00e9miai tulajdons\u00e1gainak kombin\u00e1ci\u00f3ja vonz\u00f3 anyagg\u00e1 teszi a k\u00fcl\u00f6nb\u00f6z\u0151 ipar\u00e1gakban, a kop\u00e1s\u00e1ll\u00f3s\u00e1got \u00e9s a f\u00e9kszil\u00e1rds\u00e1got n\u00f6vel\u0151 ker\u00e1mialemezekt\u0151l kezdve a magas h\u0151vezet\u0151 k\u00e9pess\u00e9g\u00e9ig \u00e9s az alacsony t\u00e1gul\u00e1si egy\u00fctthat\u00f3j\u00e1ig, amelyek lehet\u0151v\u00e9 teszik a magas h\u0151m\u00e9rs\u00e9klet\u0171 alkalmaz\u00e1sokban val\u00f3 felhaszn\u00e1l\u00e1s\u00e1t.<\/p>\n
Emellett egyed\u00fcl\u00e1ll\u00f3 s\u00e1vh\u00e9zaga lehet\u0151v\u00e9 teszi, hogy magasabb fesz\u00fclts\u00e9gen \u00e9s frekvenci\u00e1n m\u0171k\u00f6dj\u00f6n, mint a hagyom\u00e1nyos szil\u00edcium alap\u00fa elektronika, \u00edgy t\u00f6k\u00e9letes anyag az olyan teljes\u00edtm\u00e9ny-eszk\u00f6z\u00f6kh\u00f6z, mint a di\u00f3d\u00e1k, tranzisztorok \u00e9s tirisztorok.<\/p>\n
A szil\u00edcium-karbid (SiC) egy szervetlen ker\u00e1mia, amely kiv\u00e1l\u00f3 termikus tulajdons\u00e1gokkal rendelkezik, \u00edgy sz\u00e1mos k\u00fcl\u00f6nb\u00f6z\u0151 alkalmaz\u00e1sban alkalmazhat\u00f3. A szil\u00edciumkarbidot kem\u00e9nys\u00e9ge miatt a kop\u00e1s\u00e1ll\u00f3 alkatr\u00e9szekt\u0151l \u00e9s csiszol\u00f3anyagokt\u00f3l kezdve, h\u0151\u00e1ll\u00f3s\u00e1ga \u00e9s alacsony h\u0151t\u00e1gul\u00e1sa miatt a t\u0171z\u00e1ll\u00f3 anyagokban \u00e9s ker\u00e1mi\u00e1kban, valamint az elektronik\u00e1ban, ahol sz\u00e9ls\u0151s\u00e9ges h\u0151m\u00e9rs\u00e9kleten is k\u00e9pes vezetni az elektromoss\u00e1got.<\/p>\n
A SiC hat\u00e9kony h\u0151vezet\u0151, mivel gy\u00e9m\u00e1nt kocka krist\u00e1lyszerkezete az atomok fel\u00e9t szil\u00edciummal helyettes\u00edti, ami kiv\u00e1l\u00f3 h\u0151vezet\u0151 k\u00e9pess\u00e9get biztos\u00edt. A SiC hat\u00e9kony s\u00e1vh\u00e9zaggal rendelkezik, amely lehet\u0151v\u00e9 teszi az elektronok sz\u00e1m\u00e1ra, hogy k\u00f6nnyen mozogjanak a valencia- \u00e9s a vezet\u00e9si s\u00e1vok k\u00f6z\u00f6tt, szemben a szigetel\u0151kkel, amelyekn\u00e9l az elektronoknak t\u00falzott mennyis\u00e9g\u0171 energi\u00e1ra van sz\u00fcks\u00e9g\u00fck ahhoz, hogy \u00e1tl\u00e9pj\u00e9k ezt a s\u00e1vok k\u00f6z\u00f6tti szakad\u00e9kot.<\/p>\n
A SiC krist\u00e1lyszerkezete k\u00fcl\u00f6nb\u00f6z\u0151 form\u00e1kat, \u00fagynevezett polyt\u00edpusokat vehet fel. Minden egyes polyt\u00edpus olyan r\u00e9tegekb\u0151l \u00e1ll, amelyek meghat\u00e1rozott egym\u00e1sra r\u00e9tegz\u0151d\u00e9si sorrendben vannak egym\u00e1sra helyezve, ami egyedi atomelrendez\u00e9st eredm\u00e9nyez - ez adja a SiC rendk\u00edv\u00fcl magas fajh\u0151j\u00e9t \u00e9s alacsony h\u0151t\u00e1gul\u00e1si egy\u00fctthat\u00f3j\u00e1t.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide, or SiC, is an extremely strong and durable material with some unique electrical properties. Crystalline carbon can be […]<\/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-42","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts\/42","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/comments?post=42"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts\/42\/revisions"}],"predecessor-version":[{"id":43,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts\/42\/revisions\/43"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/media?parent=42"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/categories?post=42"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/tags?post=42"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}