Kuyera kwa ufa wa SiC kudzakhudza mwachindunji ubwino ndi magwiridwe antchito a SiC single crystal yomwe imalimidwa ndi njira ya PVT, ndipo zipangizo zopangira ufa wa SiC ndi ufa wa Si woyera kwambiri ndi ufa wa C woyera kwambiri, ndipo kuyera kwa ufa wa C kudzakhudza mwachindunji kuyera kwa ufa wa SiC.
Zipangizo zopangira zomwe zimagwiritsidwa ntchito popanga toner nthawi zambiri zimaphatikizapo flake graphite, petroleum coke ndi inki ya miyala ya microcrystalline. Kuyera kwa graphite kukakhala kwakukulu, kugwiritsa ntchito kwake kumakhala kwakukulu. Njira zoyeretsera graphite zitha kugawidwa m'njira zakuthupi ndi njira zamankhwala. Njira zoyeretsera thupi zimaphatikizapo kuyandama ndi kuyeretsa kutentha kwambiri, ndipo njira zoyeretsera mankhwala zimaphatikizapo njira ya acid-base, njira ya hydrofluoric acid ndi njira yokazinga ya chloride. Pakati pawo, njira yoyeretsera kutentha kwambiri ingagwiritse ntchito malo osungunuka kwambiri (3773K) ndi malo owira a graphite kuti ikwaniritse 4N5 ndi kuyera kwakukulu, komwe kumaphatikizapo kuphulika ndi kutulutsa zonyansa ndi malo owira otsika, kuti akwaniritse cholinga choyeretsera [6]. Ukadaulo wofunikira wa toner yoyera kwambiri ndikuchotsa zonyansa zochepa. Kuphatikiza ndi makhalidwe a kuyeretsa mankhwala ndi kuyeretsa kutentha kwakukulu, njira yapadera yoyeretsera thermochemical yosakanikirana imagwiritsidwa ntchito kuti ikwaniritse kuyeretsa kwa zipangizo za toner yoyera kwambiri, ndipo kuyera kwa chinthucho kumatha kukhala kopitilira 6N.
Magwiridwe antchito ndi zinthu zake:
1, kuyera kwa zinthu≥99.9999% (6N);
2, kukhazikika kwa ufa wa kaboni woyera kwambiri, kuchuluka kwa graphitization, kuchepa kwa zodetsa;
3, kuchuluka kwa zinthu ndi mtundu wake zitha kusinthidwa malinga ndi ogwiritsa ntchito.
Ntchito zazikulu za mankhwalawa:
■ Kupanga ufa wa SiC woyeretsedwa kwambiri ndi zinthu zina zopanga carbide zolimba
■ Kulima diamondi
■ Zipangizo zatsopano zoyendetsera kutentha kwa zinthu zamagetsi
■ Katundu wa cathode wa lithiamu wapamwamba kwambiri
■ Zinthu zamtengo wapatali zachitsulo ndi zinthu zopangira
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