I-graphite crucibleiwumkhiqizo okhethekile odlala indima ebalulekile ekucwengisweni kwegolide, isiliva, ithusi nezinye izinsimbi eziyigugu.Nakuba abantu abaningi bengase bangazijwayele, ukukhiqizwa kwezinsimbi ze-graphite kuhilela izigaba eziningana eziyinkimbinkimbi ukuze kuqinisekiswe ikhwalithi ephakeme namandla omshini womkhiqizo wokugcina.Kulesi sihloko, sizocubungula imininingwane yesiteji ngasinye esibandakanyekayo enqubweni yokukhiqiza i-graphite crucible.
Izigaba zokuqala zokukhiqiza ama-graphite crucibles zibandakanya inqubo yokomisa.Ngemva kokwakhiwa kwe-crucible kanye nezingxenye zayo ezilengayo ezisekelayo, ziyahlolwa ngokuvumelana nezindinganiso zomkhiqizo osuphelile.Lokhu kuhlola kuqinisekisa ukuthi abantu abaqeqeshiwe kuphela badlulela ezigabeni ezilandelayo.Ngemuva kokuhlunga, benza inqubo yokucwebezela, lapho i-crucible surface imbozwe nge-glaze.Lolu ngqimba olucwebezelayo lufeza izinjongo ezimbalwa, ezihlanganisa ukukhulisa ukuminyana namandla emishini ye-crucible, ekugcineni ithuthukise ikhwalithi yayo yonke.
Isiteji sokudubula siyingxenye ebalulekile yenqubo yokukhiqiza.Kuhilela ukufaka i-graphite crucible emazingeni aphezulu okushisa kuhhavini, ngaleyo ndlela kuqiniswe ukwakheka kwe-crucible.Le nqubo ibalulekile ukuze kuqinisekiswe ukuqina nokuthembeka kwe-crucible phakathi nenqubo yokucwenga.Isimiso sokudubula singahlukaniswa sibe izigaba ezine ezihlukene ukuze uqonde kangcono izinguquko ezenzeka esakhiweni se-crucible phakathi nale nqubo.
Isigaba sokuqala yisiteji sokushisa nokudubula, futhi izinga lokushisa kuhhavini ligcinwa cishe ku-100 kuya ku-300 ° C.Kulesi sigaba, umswakama osele ku-crucible uyasuswa kancane kancane.Vula i-skylight ye-kiln futhi wehlise izinga lokushisa ukuze uvimbele ukushintsha okungazelelwe kwezinga lokushisa.Ukulawula izinga lokushisa kubalulekile kulesi sigaba, njengoba umswakama omningi oyinsalela ungabangela ukuqhekeka kwe-crucible noma ngisho nokuqhuma.
Isigaba sesibili yisigaba sokudubula esisezingeni eliphansi, esinezinga lokushisa elingu-400 kuya ku-600°C.Njengoba iziko liqhubeka nokushisa, amanzi abophekile ngaphakathi kwe-crucible aqala ukuphuka futhi ahwamuke.Izingxenye eziyinhloko i-A12O3 ne-SiO2, ezaziboshwe ngaphambili obumba, ziqala ukuba khona esimweni esikhululekile.Kodwa-ke, kufanele kuqashelwe ukuthi ungqimba lwe-glaze ebusweni be-crucible alukakancibiliki okwamanje.Ukuze uvimbele noma yiziphi izimanga, izinga lokushisa kufanele lihlale linensa futhi lizinzile.Ukushisa okusheshayo nokungalingani kungabangela ukuthi i-crucible iqhekeke noma iwe, ibeke engozini ubuqotho bayo.
Ukungena esigabeni sesithathu, izinga lokushisa eliphakathi nendawo ngokuvamile livela phakathi kuka-700 no-900°C.Kulesi sigaba, i-Al2O3 e-amorphous obumba iguqulwa kancane ukuze yakhe i-Y-type crystalline Al2O3.Lolu shintsho luthuthukisa futhi ubuqotho besakhiwo se-crucible.Kubalulekile ukugcina izinga lokushisa elinembile ngalesi sikhathi ukugwema noma yimiphi imiphumela engathandeki.
Isigaba sokugcina yisigaba sokudubula esisezingeni eliphezulu, esinezinga lokushisa elingaphezu kuka-1000°C.Kuleli qophelo, ungqimba olucwebezelayo lugcina luncibilika, luqinisekise ukuthi indawo ye-crucible ibushelelezi futhi ivalekile.Amazinga okushisa aphezulu aphinde anikele ekuthuthukisweni okuphelele kwamandla emishini ye-crucible kanye nokuqina.
Sekukonke, inqubo yokukhiqiza izinsimbi ze-graphite ihilela izigaba ezimbalwa zokucophelela.Ukusuka ekomisweni nasekuhloleni umkhiqizo osuphelile kuya ekucwebezeni nasekudubuleni, isinyathelo ngasinye sibalulekile ukuze kuqinisekiswe ikhwalithi nokuthembeka kwe-crucible yokugcina ye-graphite.Ukunamathela ezilinganisweni zokulawula izinga lokushisa nokugcina amazinga okushisa afanele kubalulekile ekuvimbeleni noma yiziphi izinkinga ezingase zibe khona noma izingozi.Umphumela uba i-graphite crucible yekhwalithi ephezulu ekwazi ukumelana nenqubo yokucwenga ngokuqinile yezinsimbi eziyigugu.
Isikhathi sokuthumela: Nov-29-2023