I-crucible yenziwe nge-aluminium oxide enezinga lokushisa lokudubula elingu-1800 degree kanye namahora angu-40 we-sintering time.Ukunikezwa kuyahlukahluka komumo wekhava ye-alumina ukuze uvumelane nezidingo zakho ezihlukene zokusebenzisa, ungambozwa ngokuqinile ebhodweni, isivalo akulula ukusiphuka ngokuphila isikhathi eside.