{"id":50,"date":"2024-03-28T09:10:32","date_gmt":"2024-03-28T01:10:32","guid":{"rendered":"http:\/\/siliconcarbideceramic.net\/?p=50"},"modified":"2024-07-07T21:43:15","modified_gmt":"2024-07-07T13:43:15","slug":"szilicium-karbid-tulajdonsagai","status":"publish","type":"post","link":"https:\/\/siliconcarbideceramic.net\/hu\/silicon-carbide-properties\/","title":{"rendered":"Szil\u00edcium-karbid tulajdons\u00e1gai"},"content":{"rendered":"

A szil\u00edciumkarbid (SiC) egy rendk\u00edv\u00fcl tart\u00f3s anyag, amely a Mohs-sk\u00e1la szerint 9-es kem\u00e9nys\u00e9g\u0171, \u00e9s eszt\u00e9tikailag a gy\u00e9m\u00e1nt\u00e9val vetekszik.<\/p>\n

Az EAG Laboratories sz\u00e9lesk\u00f6r\u0171 tapasztalattal rendelkezik a SiC ilyen tulajdons\u00e1gainak elemz\u00e9se ter\u00e9n, \u00f6mlesztett \u00e9s t\u00e9rbeli felbont\u00e1s\u00fa analitikai technik\u00e1k alkalmaz\u00e1s\u00e1val. Egyar\u00e1nt szolg\u00e1lhat elektromos szigetel\u0151k\u00e9nt \u00e9s f\u00e9lvezet\u0151k\u00e9nt.<\/p>\n

Kem\u00e9nys\u00e9g<\/h2>\n

A szil\u00edciumkarbid a vil\u00e1g egyik legkem\u00e9nyebb anyaga, a Mohs-sk\u00e1l\u00e1n a kilencedik helyen \u00e1ll, \u00e9s kem\u00e9nys\u00e9g\u00e9t tekintve a m\u00e1sodik a gy\u00e9m\u00e1nt ut\u00e1n. A b\u00f3rkarbid \u00e9s a gy\u00e9m\u00e1nt m\u00e9g a szil\u00edciumkarbidn\u00e1l is kem\u00e9nyebb - egy\u00e9b felhaszn\u00e1l\u00e1si ter\u00fcletei k\u00f6z\u00e9 tartoznak a v\u00e1g\u00f3szersz\u00e1mok, a goly\u00f3\u00e1ll\u00f3 mell\u00e9nyek, az aut\u00f3alkatr\u00e9szek \u00e9s a csillag\u00e1szati t\u00e1vcs\u00f6vek t\u00fckrei. A szil\u00edciumkarbid kem\u00e9ny \u00e9s er\u0151s fel\u00fclete kiv\u00e1l\u00f3an alkalmas v\u00e1g\u00f3csiszol\u00f3 \u00e9s v\u00e1g\u00f3szersz\u00e1mok, szerkezeti anyagok (goly\u00f3\u00e1ll\u00f3 mell\u00e9nyek), aut\u00f3alkatr\u00e9szek \u00e9s t\u00e1vcs\u00f6vek \u00e1ltal haszn\u00e1lt t\u00fckr\u00f6k felhaszn\u00e1l\u00e1s\u00e1ra!<\/p>\n

A h\u0151sokk\u00e1ll\u00f3 ker\u00e1mia egy rendk\u00edv\u00fcl kem\u00e9ny, nem oxidos ker\u00e1mia. Szil\u00e1rds\u00e1ga, nagy h\u0151vezet\u0151 k\u00e9pess\u00e9ge, alacsony h\u0151t\u00e1gul\u00e1si sebess\u00e9ge \u00e9s kiv\u00e1l\u00f3 oxid\u00e1ci\u00f3val szembeni ellen\u00e1ll\u00e1sa miatt; ez teszi n\u00e9lk\u00fcl\u00f6zhetetlen t\u0171z\u00e1ll\u00f3 anyagg\u00e1.<\/p>\n

A szil\u00edciumkarbid (14-es atomi sz\u00e1m) \u00e9s a sz\u00e9n (6-os atomi sz\u00e1m) szil\u00edciumkarbid n\u00e9ven ismert szervetlen vegy\u00fcletet alkot, amelynek k\u00e9t els\u0151dleges koordin\u00e1ci\u00f3s tetra\u00e9der\u00e9t kovalensen k\u00f6t\u00f6tt n\u00e9gy sz\u00e9n- \u00e9s n\u00e9gy szil\u00edciumatom alkotja, kovalensen \u00f6sszekapcsol\u00f3dva, kiv\u00e9telesen er\u0151s \u00e9s merev, szoros k\u00f6t\u00e9s\u0171, kiemelked\u0151 szil\u00e1rds\u00e1g\u00fa \u00e9s merevs\u00e9g\u0171 szerkezetet hozva l\u00e9tre; t\u00f6bbt\u00edpusai ak\u00e1r t\u00f6bbt\u00edpus\u00fav\u00e1 is halmoz\u00f3dhatnak. A szil\u00edciumkarbid sz\u00e9les s\u00e1vh\u00e9zag\u00fa f\u00e9lvezet\u0151 tulajdons\u00e1gokkal rendelkezik, \u00e9s a szil\u00edciumhoz k\u00e9pest h\u00e1romszor kevesebb energi\u00e1t ig\u00e9nyel az elektronok p\u00e1lya\u00e1llapotokb\u00f3l val\u00f3 kiszabad\u00edt\u00e1s\u00e1hoz.<\/p>\n

Korr\u00f3zi\u00f3\u00e1ll\u00f3s\u00e1g<\/h2>\n

A szil\u00edciumkarbid legfontosabb tulajdons\u00e1ga a korr\u00f3zi\u00f3val szembeni ellen\u00e1ll\u00e1s. Nemcsak a legagressz\u00edvabb savakkal (s\u00f3sav, k\u00e9nsav \u00e9s fluorvegy\u00fclet), l\u00fagokkal \u00e9s old\u00f3szerekkel szemben ellen\u00e1ll\u00f3, hanem az olyan oxid\u00e1l\u00f3 k\u00f6zegekkel szemben is, mint a sal\u00e9tromsav vagy a g\u0151z, de m\u00e9g a sz\u00e9ls\u0151s\u00e9ges h\u0151m\u00e9rs\u00e9klet vagy az elektromos mez\u0151k okozta k\u00e1rosod\u00e1ssal szemben is kiv\u00e1l\u00f3 szigetel\u0151 tulajdons\u00e1gokkal rendelkezik.<\/p>\n

A szinterezett szil\u00edciumkarbid kiv\u00e1l\u00f3 h\u0151\u00e1ll\u00f3s\u00e1got biztos\u00edt s\u0171r\u0171s\u00e9g\u00e9nek, kem\u00e9nys\u00e9g\u00e9nek, sz\u00e9les s\u00e1vsz\u00e9less\u00e9g\u0171 f\u00e9lvezet\u0151 tulajdons\u00e1gainak, amelyek lehet\u0151v\u00e9 teszik a vezet\u00e9si s\u00e1v eltol\u00f3d\u00e1s\u00e1hoz sz\u00fcks\u00e9ges alacsonyabb elektronenergia-felhaszn\u00e1l\u00e1st, valamint alacsony h\u0151t\u00e1gul\u00e1si egy\u00fctthat\u00f3j\u00e1nak k\u00f6sz\u00f6nhet\u0151en.<\/p>\n

A korr\u00f3zi\u00f3\u00e1ll\u00f3s\u00e1g a szinterel\u00e9si adal\u00e9kanyagok, a szemcsehat\u00e1r f\u00e1zisok \u00e9s a porozit\u00e1s jelenl\u00e9t\u00e9vel is fokozhat\u00f3; ezek t\u00edpusa \u00e9s mennyis\u00e9ge att\u00f3l f\u00fcgg, hogy a korr\u00f3zi\u00f3 milyen gyorsan reag\u00e1l m\u00e1s k\u00f6rnyezetekkel.<\/p>\n

A szil\u00edcium-karbid oxid\u00e1ci\u00f3s \u00e1llapota a sz\u00e9n passziv\u00e1l\u00f3szerk\u00e9nt val\u00f3 viselked\u00e9se r\u00e9v\u00e9n szab\u00e1lyozhat\u00f3, ami seg\u00edt cs\u00f6kkenteni a korr\u00f3zi\u00f3 m\u00e9rt\u00e9k\u00e9t \u00e9s meghosszabb\u00edtja a term\u00e9k \u00e9lettartam\u00e1t, amikor az \u00fczem k\u00f6zbeni oxid\u00e1l\u00f3 k\u00f6rnyezetnek van kit\u00e9ve.<\/p>\n

H\u0151vezet\u0151 k\u00e9pess\u00e9g<\/h2>\n

A szil\u00edciumkarbid rendk\u00edv\u00fcl kem\u00e9ny anyag, valahol a timf\u00f6ld (9 a Mohs-sk\u00e1l\u00e1n) \u00e9s a gy\u00e9m\u00e1nt (10) k\u00f6z\u00f6tt helyezkedik el. Kem\u00e9nys\u00e9g\u00e9nek \u00e9s h\u0151stabilit\u00e1s\u00e1nak kombin\u00e1ci\u00f3ja miatt a szil\u00edciumkarbid kiv\u00e1l\u00f3 anyagv\u00e1laszt\u00e1s ig\u00e9nyes mechanikai alkalmaz\u00e1sokhoz a kop\u00e1s\u00e1ll\u00f3 anyagokkal szemben ellen\u00e1ll\u00f3 alkatr\u00e9szekhez, valamint t\u0171z\u00e1ll\u00f3 anyagokhoz.<\/p>\n

A szilikongumi kiv\u00e1l\u00f3 h\u0151\u00e1ll\u00f3s\u00e1ga \u00e9s alacsony h\u0151t\u00e1gul\u00e1si sebess\u00e9ge miatt a magas h\u0151m\u00e9rs\u00e9klet\u0171 k\u00f6rnyezetekben \u00e9s cs\u0151rendszerekben haszn\u00e1lt alkatr\u00e9szekn\u00e9l is j\u00f3l alkalmazhat\u00f3.<\/p>\n

A szil\u00edcium-karbidot k\u00fcl\u00f6nb\u00f6z\u0151 elemekkel lehet adal\u00e9kolni, hogy megv\u00e1ltoztass\u00e1k elektronikus tulajdons\u00e1gait. A nitrog\u00e9nnel vagy foszforral t\u00f6rt\u00e9n\u0151 d\u00f3zerol\u00e1s n-t\u00edpus\u00fa f\u00e9lvezet\u0151v\u00e9, m\u00edg a berilliummal, b\u00f3rral vagy alum\u00edniummal t\u00f6rt\u00e9n\u0151 d\u00f3zerol\u00e1s p-t\u00edpus\u00fa f\u00e9lvezet\u0151v\u00e9 alak\u00edtja \u00e1t.<\/p>\n

A szil\u00edciumkarbid s\u00e1vh\u00e9zag\u00e1nak a valencia- \u00e9s vezet\u00e9si s\u00e1vok k\u00f6z\u00f6tti k\u00fcl\u00f6nbs\u00e9ge miatt az elektronok nehezebben v\u00e1ltanak a k\u00e9t s\u00e1v k\u00f6z\u00f6tt, \u00edgy a szil\u00edciumkarbid ak\u00e1r 10-szer t\u00f6bb elektromos mez\u0151t k\u00e9pes elviselni, miel\u0151tt t\u00f6r\u00e9kenny\u00e9 v\u00e1lna \u00e9s t\u00f6nkremenne, mint a szilikon.<\/p>\n

Elektromos vezet\u0151k\u00e9pess\u00e9g<\/h2>\n

A szil\u00edcium-karbid sz\u00e1mos elektromos tulajdons\u00e1got k\u00edn\u00e1l, amelyek adal\u00e9kol\u00e1ssal testre szabhat\u00f3k. A d\u00fas\u00edt\u00e1s sor\u00e1n a krist\u00e1lyszerkezetbe szennyez\u0151d\u00e9seket adnak, hogy szabad elektronokat \u00e9s lyukakat k\u00e9pezzenek, amelyek vezetik az elektromoss\u00e1got, \u00edgy a SiC vezet\u0151k\u00e9pess\u00e9ge t\u00edzszer nagyobb lesz, mint a szil\u00edcium\u00e9.<\/p>\n

A szil\u00edciumkarbid elektromos tulajdons\u00e1gait nagym\u00e9rt\u00e9kben meghat\u00e1rozza a s\u00e1vh\u00e9zag. Az atom valencias\u00e1vj\u00e1nak \u00e9s vezet\u00e9si s\u00e1vj\u00e1nak energiaszintjei k\u00f6z\u00f6tti k\u00fcl\u00f6nbs\u00e9g hat\u00e1rozza meg, hogy mekkora elektromos teret k\u00e9pes elviselni; a szil\u00edcium-karbid sz\u00e9lesebb s\u00e1vh\u00e9zaggal b\u00fcszk\u00e9lkedhet, mint szil\u00edcium t\u00e1rsa, \u00edgy csaknem k\u00e9tszer akkora fesz\u00fclts\u00e9get k\u00e9pes elviselni.<\/p>\n

A nagy fesz\u00fclts\u00e9g\u00e1ll\u00f3s\u00e1g miatt a neod\u00edmium ide\u00e1lis az elektromos j\u00e1rm\u0171vek t\u00e1pegys\u00e9g\u00e9ben val\u00f3 felhaszn\u00e1l\u00e1sra, ami hosszabb vezet\u00e9si t\u00e1vols\u00e1got \u00e9s nagyobb akkumul\u00e1tor-kezel\u00e9si hat\u00e9konys\u00e1got biztos\u00edt. Tov\u00e1bb\u00e1, az alternat\u00edv\u00e1khoz, p\u00e9ld\u00e1ul a gallium-nitridhez k\u00e9pest kisebb s\u00falya lehet\u0151v\u00e9 teszi a teljes\u00edtm\u00e9nyelektronikai gy\u00e1rt\u00f3k sz\u00e1m\u00e1ra, hogy jelent\u0151sen cs\u00f6kkents\u00e9k a m\u00e9retet \u00e9s a s\u00falyt, mik\u00f6zben minim\u00e1lis h\u0151t\u00e1gul\u00e1si egy\u00fctthat\u00f3val ellen\u00e1ll a magas h\u0151m\u00e9rs\u00e9kleteknek.<\/p>\n

\"Szil\u00edcium-karbid<\/p>","protected":false},"excerpt":{"rendered":"

Silicon Carbide (SiC) is an extremely durable material with an extremely hard Mohs scale hardness rating of 9 and an […]<\/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":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","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-50","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\/50","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=50"}],"version-history":[{"count":3,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts\/50\/revisions"}],"predecessor-version":[{"id":188,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts\/50\/revisions\/188"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/media?parent=50"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/categories?post=50"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/tags?post=50"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}