Ekukhiqizweni kwe-Si ne-FeSi, umthombo oyinhloko we-Si yi-SiO2, ngendlela ye-quartz. Ukusabela nge-SiO2 kukhiqiza igesi ye-SiO ephinde iphendule nge-SiC ukuya ku-Si. Ngesikhathi sokushisisa, i-quartz izoguqulela kwezinye izinguquko ze-SiO2 nge-cristobalite njengesigaba esizinzile sezinga lokushisa eliphezulu. Ukuguqulela ku-cristobalite kuyinqubo ehamba kancane. Izinga layo liye laphenywa emithonjeni embalwa ye-quartz yezimboni futhi kuboniswe ukuthi liyahluka kakhulu phakathi kwezinhlobo ezihlukene ze-quartz. Okunye okuhlukile ekuziphatheni ngesikhathi sokushisa phakathi kwale mithombo ye-quartz, njengokuthambisa izinga lokushisa nokunwetshwa kwevolumu, nakho kuye kwafundwa. Isilinganiso se-quartz-cristobalite sizothinta izinga lokusabela elibandakanya i-SiO2. Imiphumela yezimboni neminye imithelela yomehluko oboniwe phakathi kwezinhlobo ze-quartz kuyaxoxwa ngayo. Emsebenzini wamanje, indlela entsha yokuhlola yenziwe, futhi uphenyo lwemithombo emisha embalwa ye-quartz luqinisekise umehluko omkhulu obonwe ngaphambili phakathi kwemithombo ehlukene. Ukuphindaphinda kwedatha kuhlolisisiwe futhi umphumela womoya wegesi uyaphenywa. Imiphumela evela emsebenzini wangaphambili ifakiwe njengesisekelo sengxoxo.
I-quartz ehlanganisiwe inezinto ezinhle kakhulu ezishisayo namakhemikhali njengezinto ezibonakalayo zokukhula kwekristalu eyodwa ukusuka ekuncibilikeni, futhi ukuhlanzeka kwayo okuphezulu nezindleko eziphansi kuyenza ihehe ikakhulukazi ekukhuleni kwamakristalu ahlanzekile kakhulu. Kodwa-ke, ekukhuleni kwezinhlobo ezithile zamakristalu, ungqimba lwe-pyrolytic carbon coating luyadingeka phakathi kokuncibilika kanye ne-quartz crucible. Kulesi sihloko, sichaza indlela yokusebenzisa i-pyrolytic carbon coating ngokuthuthwa kwe-vacuum vapor. Indlela iboniswa ukuthi iyasebenza ekunikezeni ukunamathela okufanayo okulinganayo kububanzi obuhlukahlukene bosayizi nokuma. Umphumela we-pyrolytic carbon coating ubonakala ngezilinganiso zokunciphisa amehlo. Enqubweni ngayinye yokumboza, ubukhulu bokunamathela buboniswa busondela kunani lokugcina elinomsila ovelayo njengoba ubude be-pyrolysis bukhula, futhi ukushuba okumaphakathi cishe kukhuphuka ngokuhambisana nenani levolumu ye-hexane vapor etholakalayo endaweni ye-pyrolytic. enamathela. Amakristalu e-quartz ahlanganiswe yile nqubo asetshenziselwe ukukhula ngempumelelo aze afike ku-2-in-diameter we-Nal single crystals, futhi izinga eliphezulu le-Nal crystal litholakale lithuthuka njengoba ukushuba kwe-coating kukhuphuka.
Isikhathi sokuthumela: Aug-29-2023