Ubuchwepheshe bokukhiqiza be-graphite-silicon carbide crucible

Ukwakheka kwempahla eluhlaza of graphite-silicon carbide cruciblesiyinhlanganisela elinganiselayo ngokucophelela yezinto ezihlukahlukene, ngayinye ineqhaza enezici eziyingqayizivele zomkhiqizo wokugcina. Yakhiwe nge-flake graphite, i-silicon carbide, i-elemental silicon powder, i-boron carbide powder nobumba, iphesenti lesisindo salezi zinto zokusetshenziswa lidlala indima ebalulekile ekunqumeni izakhiwo ze-crucible.

Inqubo yokukhiqiza ye-graphite-silicon carbide crucibles iwuchungechunge lwezinyathelo ezicophelelayo eziqinisekisa ikhwalithi nobuqotho bomkhiqizo wokugcina. Izinto zokusetshenziswa ziqala zixutshwe ngokulinganayo ukuze zenze udaka olufanelekile, olube selufakwa esikhunjeni bese lucindezelwa lube yisimo kusetshenziswa umshini wokunyathelisa we-isostatic. Okungenalutho okuwumphumela kube sekuyomiswa futhi kugcotshwe nge-glaze evikelayo, ebese ikhishwa nge-oxid bese inyibilika ibe yingilazi ecwebezelayo ngenqubo yokudubula enqunu. Umkhiqizo oqediwe ube usuhlolwa bese uthathwa njengokulungele ukusetshenziswa.

Okuhlukile ngale nqubo yokukhiqiza ubulula bayo kanye nokusebenza okuhle kakhulu kwe-crucibles ewumphumela. I-crucible inokuthungwa okufanayo, ukuminyana okuphezulu, i-porosity ephansi, ukuqhutshwa kwe-thermal okusheshayo nokumelana nokugqwala okuqinile. Lezi zimfanelo ziyenza ilungele ukusetshenziswa okuhlukahlukene, ikakhulukazi ezimbonini lapho amazinga okushisa aphezulu kanye namakhemikhali anokhahlo ajwayelekile.

Isici esisodwa esiphawulekayo senqubo yokukhiqiza ukusetshenziswa kobumba njengesibophezelo. Lokhu kukhetha kufeza inhloso embaxambili njengoba kungagcini nje ngokunikela ekusebenzeni okufiswayo kwe-crucible kodwa futhi kunciphisa ukukhathazeka kwemvelo. Le nqubo isebenzisa ubumba njengesibophezelo ukuze igweme ukubola nokukhululwa kwezinto eziyingozi njenge-phenolic resin noma itiyela, ezingase zikhiqize intuthu eyingozi nothuli phakathi nenqubo yokudubula futhi zingcolise imvelo.

Kafushane, ukwakheka kwezinto ezingavuthiwe kanye nenqubo yokukhiqiza ye-graphite silicon carbide crucible ibonisa ukuhlanganiswa okuvumelana kwesayensi nobuchwepheshe nokuqwashisa ngemvelo. Imikhiqizo ewumphumela iwubufakazi bobuhlakani bezinqubo zokukhiqiza zesimanje, ezihlinzeka ngezixazululo ezinokwethenjelwa nezisimeme ezimbonini ezidinga ama-crucibles asebenza kahle kakhulu.