Carbura de siliciu are numeroase aplica\u021bii \u0219i se prezint\u0103 sub form\u0103 de abrazivi, pulbere ceramic\u0103 \u0219i armur\u0103 antiglon\u021b.<\/p>\n
Carborundum (SiC), un compus cristalin de siliciu \u0219i carbon, este una dintre cele mai dure substan\u021be cunoscute, cu propriet\u0103\u021bi unice care \u00eel fac benefic \u00een diverse industrii.<\/p>\n
Carbura de siliciu este dur\u0103 \u0219i fragil\u0103, ceea ce o face un material abraziv eficient. Produc\u0103torii \u00eel utilizeaz\u0103 la fabricarea unor produse precum \u0219mirghelul; acest material este disponibil \u00een diferite granula\u021bii, de la granula\u021bii grosiere la granula\u021bii foarte fine, pentru opera\u021biile de \u0219lefuire, cele mai grosiere fiind utilizate pentru a \u00eendep\u0103rta cantit\u0103\u021bi mari de material \u00een opera\u021biile ini\u021biale de \u0219lefuire, \u00een timp ce cele mai fine \u0219lefuiesc suprafe\u021bele pieselor de prelucrat pentru a produce finisaje netede.<\/p>\n
Carbura de siliciu abraziv\u0103 este utilizat\u0103 \u00een produse care necesit\u0103 rezisten\u021b\u0103 ridicat\u0103, cum ar fi fr\u00e2nele auto \u0219i pl\u0103cile ceramice utilizate \u00een vestele antiglon\u021b. \u00cen plus, acest material poate fi g\u0103sit \u0219i \u00een materiale compozite precum carbura de siliciu ranforsat\u0103 cu fibre de carbon (CFRC).<\/p>\n
Carbura de siliciu este o materie prim\u0103 indispensabil\u0103 \u00een produc\u021bia de materiale refractare. Cu propriet\u0103\u021bi chimice stabile, conductivitate termic\u0103 ridicat\u0103, coeficient de dilatare termic\u0103 mic \u0219i rezisten\u021b\u0103 excelent\u0103 la uzur\u0103, acesta este un material ideal pentru crearea de abrazive rezistente la temperaturi ridicate, cum ar fi abrazivele cu band\u0103, \u0219mirghelul, ro\u021bile abrazive \u0219i uneltele cu piatr\u0103 de ulei, precum \u0219i ma\u0219inile-unelte cu siliciu monocristalin\/policristalin.<\/p>\n
Metalul este foarte dur \u0219i fragil, dar are o stabilitate termic\u0103 \u0219i mecanic\u0103 ridicat\u0103. Compus din atomi de siliciu \u00eenconjura\u021bi de atomi de carbon \u0219i oxigen, compozi\u021bia sa \u00eel face rezistent la c\u0103ldur\u0103 \u0219i stres mecanic, precum \u0219i s\u0103 aib\u0103 un punct de topire impresionant.<\/p>\n
Carbura de siliciu pur\u0103 este incolor\u0103; calit\u0103\u021bile industriale pot varia \u00een culoare de la maro la negru datorit\u0103 incluziunilor de fier, aluminiu, azot sau carbon liber. Exist\u0103 metode de dopare care creeaz\u0103 semiconductori diferi\u021bi: de exemplu, carbura de siliciu de tip n poate fi dopat\u0103 cu azot sau fosfor, \u00een timp ce versiunile de tip p pot fi dopate cu aluminiu, bor sau galiu.<\/p>\n
Carbura de siliciu este unul dintre cele mai dure materiale de pe P\u0103m\u00e2nt. Acest lucru \u00eel face ideal pentru vestele antiglon\u021b purtate de poli\u021bie \u0219i personal militar, iar propriet\u0103\u021bile sale termice \u00eel fac rezistent la c\u0103ldur\u0103.<\/p>\n
Materialele ceramice precum acesta sunt cunoscute ca fiind puternice. \u00cen plus, ceramica este un excelent conductor de c\u0103ldur\u0103 \u0219i electricitate - ceea ce o face perfect\u0103 pentru aplica\u021bii electronice precum tranzistorii de putere. \u00cen plus, rezisten\u021ba la coroziune este un alt beneficiu.<\/p>\n
Carbura de siliciu pur\u0103 are o structur\u0103 multistratificat\u0103 \u0219i exist\u0103 \u00een mai multe poltipuri sau variet\u0103\u021bi, fiecare disting\u00e2ndu-se prin secven\u021ba de stivuire care confer\u0103 fiec\u0103rui tip o caracteristic\u0103 fizic\u0103 unic\u0103 - de exemplu, unele forme con\u021bin leg\u0103turi covalente \u00eentre patru atomi de carbon lega\u021bi covalent de un atom de siliciu, form\u00e2nd o structur\u0103 de re\u021bea complex\u0103.<\/p>\n
Moissanita este produs\u0103 sintetic \u0219i se g\u0103se\u0219te rar \u00een natur\u0103, de\u0219i pot exista cantit\u0103\u021bi mici sub form\u0103 de bijuterii din moissanit\u0103. Moissanite joac\u0103 un rol esen\u021bial \u00een vehiculele electrice, deoarece capacitatea sa de a rezista la temperaturi ridicate permite vehiculelor s\u0103 devin\u0103 mai eficiente din punct de vedere energetic, reduc\u00e2nd \u00een acela\u0219i timp sistemele active de r\u0103cire care adaug\u0103 greutate, costuri \u0219i complexitate.<\/p>\n
Ceramica din carbur\u0103 de siliciu este o ceramic\u0103 nonoxid versatil\u0103 utilizat\u0103 \u00een aplica\u021bii care necesit\u0103 at\u00e2t rezisten\u021b\u0103 mecanic\u0103, c\u00e2t \u0219i termic\u0103, cum ar fi piese rezistente la uzur\u0103; materiale refractare pentru rezisten\u021b\u0103 la c\u0103ldur\u0103; materiale refractare pentru controlul expansiunii termice; \u0219i dispozitive electronice semiconductoare care func\u021bioneaz\u0103 la temperaturi sau tensiuni ridicate. Duritatea carburii de siliciu o face potrivit\u0103 pentru aceste utiliz\u0103ri, \u00een timp ce conductivitatea sa termic\u0103 o face un material eficient rezistent la c\u0103ldur\u0103. Varietatea larg\u0103 a utiliz\u0103rilor sale se extinde dincolo de aplica\u021biile mecanice; c\u00e2teva exemple sunt: abrazivi; piese rezistente la uzur\u0103; materiale refractare pentru rezisten\u021b\u0103 la c\u0103ldur\u0103; \u0219i dispozitive electronice semiconductoare care func\u021bioneaz\u0103 la temperaturi sau tensiuni ridicate.<\/p>\n
Carbura de siliciu cristalin\u0103 se formeaz\u0103 \u00eentr-o structur\u0103 str\u00e2ns\u0103 compus\u0103 din atomi lega\u021bi covalent care formeaz\u0103 dou\u0103 tetraedre de coordonare primar\u0103 formate din patru atomi de siliciu \u0219i patru atomi de carbon, ceea ce \u00eei confer\u0103 o duritate \u0219i o rezisten\u021b\u0103 incredibile. Din p\u0103cate, este insolubil\u0103 \u00een ap\u0103 sau alcool, dar rezistent\u0103 la majoritatea acizilor\/s\u0103rurilor organice \u0219i anorganice (cu excep\u021bia acidului fluorhidric \u0219i a fluorurilor acide).<\/p>\n
Semiconductorii din carbur\u0103 de siliciu dispun de un interval de band\u0103 larg care permite realizarea unor dispozitive mult mai mici \u0219i mai eficiente dec\u00e2t cele echivalente din siliciu (Si), deschiz\u00e2nd posibilitatea utiliz\u0103rii lor pentru electronica de putere \u00een vehiculele electrice, precum \u0219i pentru sprijinirea proceselor de digitalizare \u00een procesele industriale.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide has many applications and comes in the form of abrasives, ceramic powder and bulletproof armor. Carborundum (SiC), a […]<\/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-38","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/posts\/38","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/comments?post=38"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/posts\/38\/revisions"}],"predecessor-version":[{"id":39,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/posts\/38\/revisions\/39"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/media?parent=38"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/categories?post=38"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/ro\/wp-json\/wp\/v2\/tags?post=38"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}