Sil\u012bcija karb\u012bds, ko bie\u017e\u0101k d\u0113v\u0113 par karborundu, ir \u0101rk\u0101rt\u012bgi ciets materi\u0101ls, ko kop\u0161 t\u0101 ievie\u0161anas 19. gadsimta beig\u0101s izmanto da\u017e\u0101dos abraz\u012bvos un ugunsiztur\u012bgos materi\u0101los, k\u0101 ar\u012b pusvad\u012bt\u0101ju substr\u0101tos.<\/p>\n
Moisan\u012btu var atrast dab\u0101 k\u0101 retu miner\u0101lu moisan\u012btu, lai gan liel\u0101k\u0101 da\u013ca t\u0101 tiek ra\u017eota sint\u0113tiski. Pateicoties t\u0101 daudzpus\u012bgaj\u0101m \u012bpa\u0161\u012bb\u0101m un pla\u0161aj\u0101m izmanto\u0161anas iesp\u0113j\u0101m, moisan\u012bts \u0101tri vien ir k\u013cuvis par vienu no popul\u0101r\u0101kajiem materi\u0101liem.<\/p>\n
Sil\u012bcija karb\u012bds ir ciets materi\u0101ls, ko ra\u017eo da\u017e\u0101dos veidos un izmanto k\u0101 abraz\u012bvu un ugunsiztur\u012bgu materi\u0101lu. Turkl\u0101t \u0161im savienojumam ir pla\u0161a joslas sprauga un augsta elektrovad\u012btsp\u0113ja, ko izmanto augstsprieguma pusvad\u012bt\u0101ju ier\u012b\u010du ra\u017eo\u0161an\u0101.<\/p>\n
Moistan\u012bts ir sastopams dab\u0101 k\u0101 retais miner\u0101ls moizan\u012bts vai sintez\u0113ts sint\u0113tiski, rea\u0123\u0113jot sil\u012bcija dioks\u012bdam ar oglekli augst\u0101 temperat\u016br\u0101 elektriskaj\u0101 kr\u0101sn\u012b, ta\u010du ir ra\u017eotas ar\u012b sint\u0113tisk\u0101s formas, ko izmanto k\u0101 keramikas sast\u0101vda\u013cu, un, pateicoties unik\u0101lajam \u012bpa\u0161\u012bbu apvienojumam, tas ir lieliska izv\u0113le lietojumiem, kam nepiecie\u0161ama augsta termisk\u0101 un meh\u0101nisk\u0101 stabilit\u0101te.<\/p>\n
Darbiniekiem, kas str\u0101d\u0101 ar sil\u012bcija karb\u012bda pulveri, var att\u012bst\u012bties plau\u0161u slim\u012bbas, kas ir l\u012bdz\u012bgas silikozei - slim\u012bbai, kas bie\u017ei izraisa let\u0101lu izn\u0101kumu. Iedarb\u012bba var izrais\u012bt dif\u016bzu interstici\u0101lu plau\u0161u fibrozi (DIPF), ko izraisa plau\u0161u iekaisums. Tas rada nopietnu vesel\u012bbas apdraud\u0113jumu darbiniekiem, kas str\u0101d\u0101 ra\u017eo\u0161anas uz\u0146\u0113mumos, kuros ra\u017eo sil\u012bcija karb\u012bdu un taml\u012bdz\u012bgus abraz\u012bvus materi\u0101lus.<\/p>\n
Sil\u012bcija karb\u012bds ir abraz\u012bvs materi\u0101ls, ko izmanto materi\u0101lu grie\u0161anai, sl\u012bp\u0113\u0161anai un pul\u0113\u0161anai. Turkl\u0101t to bie\u017ei izmanto k\u0101 ugunsiztur\u012bgu oder\u0113jumu r\u016bpnieciskaj\u0101s kr\u0101sn\u012bs, k\u0101 ar\u012b k\u0101 nodilumiztur\u012bgas sast\u0101vda\u013cas s\u016bk\u0146iem un ra\u0137e\u0161u dzin\u0113jiem; turkl\u0101t no \u0161\u012bs vielas bie\u017ei tiek izgatavoti abraz\u012bvi instrumenti un smil\u0161pap\u012brs.<\/p>\n
Kabot\u012bta ciet\u012bba Mosa skal\u0101 ir 9,1, un p\u0113c ciet\u012bbas tas ierindojas tre\u0161aj\u0101 viet\u0101 aiz dimanta un bora karb\u012bda. T\u0101 asie abraz\u012bvie graudi\u0146i bez lielas piep\u016bles viegli \u0161\u0137e\u013c met\u0101lus, stiklu un vid\u0113ja bl\u012bvuma kok\u0161\u0137iedru pl\u0101tnes; turkl\u0101t to var izmantot smil\u0161u str\u016bklas darbos, lai no virsm\u0101m no\u0146emtu kr\u0101su, r\u016bsu vai citus p\u0101rkl\u0101jumus.<\/p>\n
Oglek\u013ca materi\u0101ls ir \u013coti iztur\u012bgs un sp\u0113j iztur\u0113t ekstrem\u0101las temperat\u016bras, \u0137\u012bmisk\u0101s vielas un eroziju. Turkl\u0101t no t\u0101 var viegli veidot keramikas komponentus, ko izmanto automa\u0161\u012bnu bremz\u0113s vai bru\u0146uvest\u0113s, k\u0101 ar\u012b melnu smilti vai pulveri kal\u0161anai, vai to var kombin\u0113t ar karborundu, lai veidotu cietu un ugunsiztur\u012bgu keramiku, kas paz\u012bstama k\u0101 karborunds - \u0161is miner\u0101ls dab\u0101 sastopams k\u0101 retais miner\u0101ls moisan\u012bts, bet masveida ra\u017eo\u0161ana s\u0101k\u0101s ap 1893. gadu, lai to izmantotu k\u0101 abraz\u012bvu.<\/p>\n
Sil\u012bcija karb\u012bds ir ugunsiztur\u012bgs materi\u0101ls, kas paredz\u0113ts iztur\u0113t augstas temperat\u016bras, vienlaikus saglab\u0101jot iztur\u012bbu pret \u0137\u012bmisko koroziju, t\u0101p\u0113c tas ir piem\u0113rots izmanto\u0161anai kr\u0101sn\u012bs un kr\u0101sn\u012bs, lai aizsarg\u0101tu t\u0101s no \u0101rk\u0101rt\u0113ja karstuma boj\u0101jumiem. T\u0101 k\u0101 t\u0101 virsmu var ar\u012b pul\u0113t, izmantojot t\u0101dus instrumentus k\u0101 grie\u0161anas diski, tam ir ar\u012b citi pielietojumi.<\/p>\n
Alum\u012bnija un sil\u012bcija karb\u012bda (SIC) \u0137ie\u0123e\u013cu izgatavo\u0161anai ir j\u0101izmanto gan alum\u012bnija oks\u012bda, gan sil\u012bcija karb\u012bda izejvielas k\u0101 izejmateri\u0101li, t\u0101s j\u0101sasmalcina, veidojot attiec\u012bgi graudus un pulverus, j\u0101sajauc ar saistvielu m\u0101lu, j\u0101noform\u0113 mais\u012bjums, pirms apdedzin\u0101\u0161anas tas j\u0101iz\u017e\u0101v\u0113, lai veidotu za\u013cu korpusu. Tas ir uzlabojums sal\u012bdzin\u0101jum\u0101 ar iepriek\u0161\u0113jiem ra\u017eojumiem, kuru izgatavo\u0161anai ASC ra\u017eo\u0161anai bija nepiecie\u0161ams atsevi\u0161\u0137i sagatavot abas izejvielu grupas.<\/p>\n
CARBOREX(r) sil\u012bcija karb\u012bds ir pieejams da\u017e\u0101dos \u0137\u012bmiskos sast\u0101vos un izm\u0113ros, kas piem\u0113roti da\u017e\u0101d\u0101m nozar\u0113m, tostarp abraz\u012bviem materi\u0101liem, keramikai, metalur\u0123ijai un ugunsiztur\u012bgajiem materi\u0101liem. Ra\u017eo\u0161ana ietver vienk\u0101r\u0161u neapstr\u0101d\u0101ta SiC ra\u017eo\u0161anu gabalos, pirms t\u0101 sasmalcin\u0101\u0161anas un \u0161\u0137iro\u0161anas, lai ieg\u016btu vajadz\u012bgos graudu vai pulvera izm\u0113rus pirms p\u0101rdo\u0161anas klientiem.<\/p>\n
Sil\u012bcija karb\u012bds, paz\u012bstams ar\u012b k\u0101 sil\u012bcija nitr\u012bds, ir \u0101rk\u0101rt\u012bgi ciets \u0137\u012bmisks savienojums, kas sast\u0101v no sil\u012bcija un oglek\u013ca. Dab\u0101 sastopams k\u0101 moizan\u012bta miner\u0101ls, bet masveida ra\u017eo\u0161ana s\u0101k\u0101s jau 1893. gad\u0101, lai to izmantotu k\u0101 abraz\u012bvu sl\u012bp\u0113\u0161anas diskos un griez\u0113jinstrumentos, k\u0101 ar\u012b r\u016bpniecisko kr\u0101\u0161\u0146u ugunsiztur\u012bgajos oder\u0113jumos un s\u016bk\u0146u un ra\u0137e\u0161u dzin\u0113ju nodilumiztur\u012bgaj\u0101s deta\u013c\u0101s.<\/p>\n
Sil\u012bcija karb\u012bds t\u012br\u0101 veid\u0101 darbojas k\u0101 elektriskais izolators; tom\u0113r, ja tas tiek papildin\u0101ts ar piemais\u012bjumiem (piedevas), piem\u0113ram, alum\u012bnija un sl\u0101pek\u013ca piedev\u0101m, tas k\u013c\u016bst par elektrisko vad\u012bt\u0101ju un pusvad\u012bt\u0101ju. Ja to papildina ar alum\u012bnija piedevas, tas k\u013c\u016bst par p tipa pusvad\u012bt\u0101ju, bet sl\u0101pek\u013ca un fosfora piedevas var pievienot ar\u012b, lai uzlabotu vad\u012btsp\u0113ju.<\/p>\n
M\u016bsdienu sil\u012bcija karb\u012bda ra\u017eo\u0161ana izmanto\u0161anai abraz\u012bvos un metalur\u0123ijas r\u016bpniec\u012bb\u0101 ietver sil\u012bcija smil\u0161u un koksa mais\u012bjuma kars\u0113\u0161anu \u0137ie\u0123e\u013cu elektrisk\u0101s pretest\u012bbas tipa kr\u0101sn\u012b, veidojot za\u013cu liet\u0146u, kas sast\u0101v no a-SiC un b-SiC rupjas krist\u0101lisk\u0101s strukt\u016bras iek\u0161pus\u0113 un nerea\u0123\u0113ju\u0161a materi\u0101la \u0101rpus\u0113; p\u0113c tam \u0161o materi\u0101lu var \u0161\u0137irot un apstr\u0101d\u0101t atkar\u012bb\u0101 no t\u0101 paredz\u0113t\u0101s izmanto\u0161anas.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide, more commonly referred to as carborundum, is an extremely hard material used in various abrasive and refractory materials as well as semiconductor substrates since its introduction during the late 19th century. Moissanite can be found naturally as the rare mineral moissanite, though most of it is produced synthetically. With its versatile properties and …<\/p>\n