SiC single crystal ndi Gulu IV-IV pawiri semiconductor zinthu zopangidwa ndi zinthu ziwiri, Si ndi C, mu chiŵerengero cha stoichiometric cha 1: 1.Kuuma kwake ndi kwachiwiri kwa diamondi.
Njira yochepetsera kaboni ya silicon oxide yokonzekera SiC imachokera pamachitidwe awa:
Zochita za kuchepetsa mpweya wa silicon oxide ndizovuta kwambiri, momwe kutentha kumakhudzira mwachindunji chomaliza.
Pokonzekera silicon carbide, zopangira zimayikidwa poyamba mu ng'anjo yotsutsa.Ng'anjo yotsutsa imakhala ndi makoma omaliza kumapeto onse awiri, ndi electrode ya graphite pakati, ndipo ng'anjo ya ng'anjo imagwirizanitsa maelekitirodi awiri.Pamphepete mwa ng'anjo ya ng'anjo, zopangira zomwe zimagwira nawo ntchito zimayikidwa poyamba, ndiyeno zipangizo zomwe zimagwiritsidwa ntchito posungira kutentha zimayikidwa pambali.Kusungunula kukayamba, ng'anjo yolimbana nayo imakhala ndi mphamvu ndipo kutentha kumakwera kufika pa 2,600 mpaka 2,700 madigiri Celsius.Mphamvu yotentha yamagetsi imasamutsidwa kupita kumalo opangira ng'anjo pamwamba pa ng'anjo, kuchititsa kuti pang'onopang'ono itenthedwe.Kutentha kwa chiwongoladzanja kupitirira 1450 digiri Celsius, zochita za mankhwala zimachitika kuti apange silicon carbide ndi mpweya wa carbon monoxide.Pamene njira yosungunula ikupitirira, malo otentha kwambiri pamotowo adzakula pang'onopang'ono, ndipo kuchuluka kwa silicon carbide yopangidwa kudzawonjezekanso.Silicon carbide imapangidwa mosalekeza mu ng'anjo, ndipo kudzera mu evaporation ndi kuyenda, makhiristo amakula pang'onopang'ono ndipo pamapeto pake amasonkhana mu cylindrical makhiristo.
Gawo la khoma lamkati la kristalo limayamba kuwola chifukwa cha kutentha kwambiri kuposa madigiri 2,600 Celsius.Chinthu cha silicon chomwe chimapangidwa ndi kuwonongeka chidzaphatikizananso ndi chinthu cha kaboni pamoto kuti chipange silicon carbide yatsopano.
Pamene mankhwala a silicon carbide (SiC) atha ndipo ng'anjoyo yakhazikika, sitepe yotsatira ikhoza kuyamba.Choyamba, makoma a ng'anjoyo amathyoledwa, ndiyeno zipangizo zomwe zili mu ng'anjo zimasankhidwa ndikuyikidwa pagawo ndi wosanjikiza.Zida zosankhidwa zimaphwanyidwa kuti tipeze granular zomwe tikufuna.Kenaka, zonyansa muzinthu zowonongeka zimachotsedwa kupyolera mu kutsuka madzi kapena kuyeretsa ndi asidi ndi alkali solutions, komanso kupatukana kwa maginito ndi njira zina.Zida zotsukidwazo ziyenera kuwumitsidwa ndikuwunikanso, ndipo pomaliza pake silicon carbide ufa ukhoza kupezeka.Ngati ndi kotheka, ufa izi zikhoza kukonzedwanso mogwirizana ndi ntchito yeniyeni, monga kuumba kapena akupera zabwino, kupanga zabwino pakachitsulo carbide ufa.
Masitepe enieni ndi awa:
(1) Zipangizo
Green silicon carbide yaying'ono ufa imapangidwa ndi kuphwanya coarser green silicon carbide.The mankhwala zikuchokera silicon carbide ayenera kukhala wamkulu kuposa 99%, ndi free carbon ndi chitsulo okusayidi ayenera kukhala zosakwana 0.2%.
(2)Kusweka
Kuphwanya mchenga wa silicon carbide kukhala ufa wabwino, njira ziwiri zomwe zimagwiritsidwa ntchito pano ku China, imodzi ndi yophwanyira mphero yonyowa pang'onopang'ono, ndipo ina ndikuphwanya pogwiritsa ntchito mphero ya ufa.
(3)Kupatukana kwa maginito
Ziribe kanthu njira yomwe imagwiritsidwa ntchito kuphwanya silicon carbide ufa kukhala ufa wabwino, kulekanitsa konyowa kwa maginito ndi kupatukana kwamaginito kumagwiritsidwa ntchito.Izi ndichifukwa choti palibe fumbi panthawi yolekanitsa maginito, zida za maginito zimalekanitsidwa kwathunthu, zomwe zimapangidwa pambuyo pa kupatukana kwa maginito zimakhala ndi chitsulo chochepa, ndipo silicon carbide ufa wotengedwa ndi maginito ndi wocheperako.
(4)Kulekanitsa madzi
Mfundo yofunikira ya njira yolekanitsa madzi ndikugwiritsa ntchito kuthamanga kosiyanasiyana kwa tinthu tating'ono ta silicon carbide tosiyanasiyana m'madzi kuti tichite kukula kwa tinthu.
(5) Kuwunika kwa Ultrasonic
Ndi chitukuko cha ukadaulo wa akupanga, chimagwiritsidwanso ntchito kwambiri pakuwunika kwa akupanga kwaukadaulo waufa wawung'ono, womwe umatha kuthana ndi zovuta zowunikira monga kutsatsa mwamphamvu, kuphatikizika kosavuta, magetsi osasunthika, kuwongolera kwakukulu, kachulukidwe kake, komanso mphamvu yokoka yopepuka. .
(6) Kuyang'anira khalidwe
Kuyang'anira khalidwe la micropowder kumaphatikizapo kupanga mankhwala, kukula kwa tinthu ndi zinthu zina.Kuti muwone njira zowunikira komanso miyezo yapamwamba, chonde onani "Silicon Carbide Technical Conditions."
(7) Kupera fumbi
Pambuyo pophatikiza ufa wawung'ono ndikuwunikiridwa, mutu wazinthu ungagwiritsidwe ntchito pokonzekera ufa wopera.Kupanga ufa wogaya kumatha kuchepetsa zinyalala ndikukulitsa unyolo wazinthu.
Nthawi yotumiza: May-13-2024