Ikristalu elilodwa le-SiC liyi-semiconductor material ye-Group IV-IV eyakhiwe yizinto ezimbili, i-Si ne-C, ngesilinganiso se-stoichiometric esingu-1:1. Ubulukhuni bayo bulandela idayimane kuphela.
Indlela yokunciphisa ikhabhoni ye-silicon oxide yokulungiselela i-SiC isekelwe kakhulu kufomula elandelayo yokusabela kwamakhemikhali:
Inqubo yokusabela yokunciphisa ikhabhoni ye-silicon oxide iyinkimbinkimbi kakhulu, lapho izinga lokushisa lokusabela lithinta ngqo umkhiqizo wokugcina.
Enqubweni yokulungiselela i-silicon carbide, izinto zokusetshenziswa zifakwa kuqala esithandweni sokumelana. Isithando sokumelana sakhiwe izindonga zokugcina kuzo zombili izinhlangothi, kanye ne-graphite electrode phakathi nendawo, kanti i-furnace core ixhumanisa ama-electrode amabili. Emngceleni we-furnace core, izinto zokusetshenziswa ezibandakanyeka ekuphenduleni zifakwa kuqala, bese izinto ezisetshenziselwa ukulondoloza ukushisa zifakwa emngceleni. Lapho ukuncibilikisa kuqala, isithando sokumelana siyanikwa amandla futhi izinga lokushisa likhuphukela kuma-degree Celsius angu-2,600 kuya ku-2,700. Amandla okushisa kagesi adluliselwa ekushajweni ngokusebenzisa ubuso be-furnace core, okwenza ukuba ifudumale kancane kancane. Lapho izinga lokushisa lokushaja lidlula ama-degree Celsius angu-1450, kwenzeka ukusabela kwamakhemikhali okukhiqiza i-silicon carbide kanye negesi ye-carbon monoxide. Njengoba inqubo yokuncibilikisa iqhubeka, indawo yokushisa ephezulu ekushajweni izokhula kancane kancane, futhi inani le-silicon carbide ekhiqizwayo nalo lizokhula. I-Silicon carbide yakhiwa njalo esithandweni somlilo, futhi ngokuhwamuka kanye nokunyakaza, amakristalu akhula kancane kancane futhi ekugcineni ahlangane abe amakristalu asilinda.
Ingxenye yodonga lwangaphakathi lwekristalu iqala ukubola ngenxa yokushisa okuphezulu okungaphezu kwama-degree Celsius angu-2,600. I-silicon element ekhiqizwa ukubola izophinde ihlangane ne-carbon element ekushajweni ukuze yakhe i-silicon carbide entsha.
Uma ukusabela kwamakhemikhali kwe-silicon carbide (SiC) sekuqediwe futhi isithando somlilo sesipholile, isinyathelo esilandelayo singaqala. Okokuqala, izindonga zesithando somlilo ziyadilizwa, bese kukhethwa izinto zokusetshenziswa ezikuso umlilo bese zihlukaniswa ngezigaba ngezigaba. Izinto zokusetshenziswa ezikhethiwe ziyachotshozwa ukuze kutholakale izinto ezihlanganisiwe esizifunayo. Okulandelayo, ukungcola ezintweni zokusetshenziswa kususwa ngokugeza ngamanzi noma ukuhlanza ngezixazululo ze-asidi ne-alkali, kanye nokuhlukaniswa kwamagnetic nezinye izindlela. Izinto zokusetshenziswa ezihlanziwe zidinga ukomiswa bese zihlolwa futhi, futhi ekugcineni kungatholakala i-silicon carbide powder emsulwa. Uma kudingeka, lezi impuphu zingacutshungulwa ngokwengeziwe ngokwendlela yokusetshenziswa kwangempela, njengokwakheka noma ukugaya kahle, ukuze kukhiqizwe i-silicon carbide powder ecolekile.
Izinyathelo ezithile yilezi ezilandelayo:
(1) Izinto zokusetshenziswa
Impuphu encane ye-silicon carbide eluhlaza ikhiqizwa ngokuchoboza i-silicon carbide eluhlaza okotshani. Ukwakheka kwamakhemikhali kwe-silicon carbide kufanele kube ngaphezu kuka-99%, kanti i-carbon ne-iron oxide yamahhala kufanele kube ngaphansi kuka-0.2%.
(2) Iphukile
Ukuze kuchotshozwe isihlabathi se-silicon carbide sibe yimpuphu ecolekileyo, kunezindlela ezimbili ezisetshenziswayo eShayina njengamanje, enye iwukuchoboza i-wet ball mill ngezikhathi ezithile, kanti enye iwukuchoboza kusetshenziswa i-airflow powder mill.
(3) Ukuhlukaniswa kwamagnetic
Kungakhathaliseki ukuthi iyiphi indlela esetshenziswayo ukuchoboza i-silicon carbide powder ibe yi-collect powder, ukuhlukaniswa okumanzi kwe-magnetic kanye nokuhlukaniswa kwe-mechanical magnetic kuvame ukusetshenziswa. Lokhu kungenxa yokuthi akukho uthuli ngesikhathi sokuhlukaniswa okumanzi kwe-magnetic, izinto ezisebenza nge-magnetic zihlukaniswa ngokuphelele, umkhiqizo ngemuva kokuhlukaniswa kwe-magnetic uqukethe insimbi encane, kanti i-silicon carbide powder ethathwe yizinto ezisebenza nge-magnetic nayo incane.
(4) Ukuhlukaniswa kwamanzi
Isimiso esiyisisekelo sendlela yokuhlukanisa amanzi ukusebenzisa isivinini esihlukene sokuxazulula izinhlayiya ze-silicon carbide ezinobubanzi obuhlukene emanzini ukwenza ukuhlunga usayizi wezinhlayiya.
(5) Ukuhlolwa kwe-Ultrasonic
Ngokuthuthuka kobuchwepheshe be-ultrasonic, busetshenziswe kabanzi ekuhlolweni kwe-ultrasonic kobuchwepheshe be-micro-powder, obungaxazulula izinkinga zokuhlola ezifana nokumuncwa okunamandla, ukuhlanganiswa okulula, ugesi ophezulu ongaguquki, ubuncane obuphezulu, ukuminyana okuphezulu, kanye nokukhanya okuqondile okunamandla.
(6) Ukuhlolwa kwekhwalithi
Ukuhlolwa kwekhwalithi ye-micropowder kufaka phakathi ukwakheka kwamakhemikhali, ukwakheka kosayizi wezinhlayiya kanye nezinye izinto. Ukuze uthole izindlela zokuhlola kanye namazinga ekhwalithi, sicela ubheke “Izimo Zobuchwepheshe ze-Silicon Carbide.”
(7) Ukukhiqizwa kothuli lokugaya
Ngemva kokuba i-micro powder iqoqwe futhi ihlolwe, ikhanda lezinto lingasetshenziswa ukulungisa i-grinding powder. Ukukhiqizwa kwe-grinding powder kunganciphisa imfucuza futhi kwandise uchungechunge lomkhiqizo.
Isikhathi sokuthunyelwe: Meyi-13-2024