I-Graphite crucibleyimveliso ekhethekileyo edlala indima ebalulekileyo kwinkqubo yokusulungekiswa kwegolide, isilivere, ubhedu kunye nezinye iintsimbi ezixabisekileyo.Nangona abantu abaninzi bengenakuqhelana nayo, ukuveliswa kwee-graphite crucibles kubandakanya izigaba ezininzi ezinzima zokuqinisekisa umgangatho ophezulu kunye namandla omatshini wemveliso yokugqibela.Kweli nqaku, siza kuhlolisisa iinkcukacha zesigaba ngasinye esibandakanyekayo kwinkqubo yokuvelisa i-graphite crucible.
Amanqanaba okuqala okuvelisa i-graphite crucibles ibandakanya inkqubo yokomisa.Emva kokuba i-crucible kunye neendawo ezixhasayo ze-pendant zenziwe, zihlolwe ngokwemigangatho yemveliso egqityiweyo.Olu vavanyo luqinisekisa ukuba ngabantu abafanelekileyo kuphela abadlulela kumanqanaba alandelayo.Emva kokuhlenga, bahamba ngenkqubo ye-glazing, apho i-crucible surface ifakwe nge-glaze.Lo maleko womkhenkce usebenzela iinjongo ezininzi, kubandakanywa nokwandisa ingxinano kunye namandla omatshini we-crucible, ekugqibeleni iphucule umgangatho wayo jikelele.
Inqanaba lokudubula liyinxalenye ebalulekileyo yenkqubo yokuvelisa.Kubandakanya ukubeka i-graphite crucible kumaqondo okushisa aphezulu kwi-oven, ngaloo ndlela iqinisa isakhiwo se-crucible.Le nkqubo ibalulekile ukuqinisekisa ukuqina kunye nokuthembeka kwe-crucible ngexesha lokucoca.Umgaqo wokudubula unokwahlulwa ube ngamanqanaba amane ahlukeneyo ukuze uqonde ngcono utshintsho olwenzeka kwisakhiwo se-crucible ngexesha le nkqubo.
Inqanaba lokuqala linqanaba lokufudumala kunye nelokudubula, kwaye iqondo lokushisa kwi-oven ligcinwa malunga ne-100 ukuya kwi-300 ° C.Kweli nqanaba, ukufuma okuseleyo kwi-crucible kususwa ngokuthe ngcembe.Vula i-skylight ye-kiln kwaye uthobe isantya sokufudumeza ukunqanda ukuguquka kobushushu ngequbuliso.Ulawulo lobushushu lubalulekile kweli nqanaba, njengoko ukufuma okuninzi okushiyekileyo kunokubangela ukuba i-crucible iqhekeke okanye ide iqhume.
Inqanaba lesibini linqanaba lobushushu obuphantsi lobushushu obuphakathi kwama-400 ukuya kuma-600°C.Njengoko i-kiln iqhubeka nokufudumala, amanzi abophekileyo ngaphakathi kwe-crucible aqala ukuphuka kwaye aphephe.Amacandelo aphambili i-A12O3 kunye ne-SiO2, eyayikade ibotshelelwe kudongwe, iqala ukubakho kwi-free state.Nangona kunjalo, kufuneka kuqatshelwe ukuba i-glaze layer ebusweni be-crucible ayizange inyibilike.Ukuthintela naziphi na izinto ezimangalisayo, izinga lokufudumeza kufuneka lihlale licotha kwaye lizinzile.Ukufudumeza okukhawulezayo kunye nokungalinganiyo kunokubangela ukuba i-crucible iqhekeze okanye idibanise, ilahle ingqibelelo yayo.
Ukungena kwinqanaba lesithathu, inqanaba eliphakathi lokudubula lihlala livela phakathi kwe-700 kunye ne-900 ° C.Kweli nqanaba, i-amorphous Al2O3 kudongwe iguqulwa ngokuyinxenye ukwenza i-Y-type crystalline Al2O3.Olu tshintsho longeza ngakumbi imfezeko yesakhiwo se-crucible.Kubalulekile ukugcina ulawulo lobushushu oluchanekileyo ngeli xesha ukuthintela naziphi na iziphumo ezingafunekiyo.
Inqanaba lokugqibela linqanaba eliphezulu lokudubula, kunye neqondo lokushisa elingaphezu kwe-1000 ° C.Ngeli xesha, i-glaze layer ekugqibeleni iyanyibilika, iqinisekisa ukuba indawo ye-crucible igudileyo kwaye itywinwe.Amaqondo obushushu aphezulu nawo anegalelo kuphuculo jikelele kumandla omatshini we-crucible kunye nokuqina.
Lilonke, inkqubo yokuvelisa i-graphite crucibles ibandakanya izigaba ezininzi ezicokisekileyo.Ukususela ekumiseni nasekuhloleni imveliso egqityiweyo ukuya kwi-glazing kunye nokudubula, isinyathelo ngasinye sibalulekile ekuqinisekiseni umgangatho kunye nokuthembeka kwe-crucible ye-graphite yokugqibela.Ukuthobela imilinganiselo yokulawula ubushushu kunye nokugcina amazinga okufudumeza afanelekileyo kubalulekile ekuthinteleni naziphi na iziphene okanye iingozi ezinokubakho.Isiphumo sokugqibela yi-graphite crucible ekumgangatho ophezulu enokumelana nenkqubo yokucocwa ngokungqongqo kweentsimbi ezixabisekileyo.
Ixesha lokuposa: Nov-29-2023