Uyini umehluko phakathi kwe-alumina ne-white corundum?

I-Alumina iyinhlanganisela yobulukhuni obuphezulu enephuzu lokuncibilika elingu-2054 degrees Celsius kanye nephuzu elibilayo elingu-2980 degrees Celsius. Kuvame ukusetshenziselwa ukwenza izinto eziphikisayo. Ingxenye eyinhloko ye-corundum i-α-alumina, engeyesibili ngemva kwedayimane ngobulukhuni. I-ruby nesafire i-corundum yekhwalithi ephezulu equkethe inani elincane lama-oxide ensimbi ahlukene. I-Ruby ngokuvamile ibomvu ngoba iqukethe inani elincane le-chromium, futhi isafire eluhlaza okwesibhakabhaka ngoba iqukethe inani elincane le-iron ne-titanium. Kuya

I-Corundum iwuhlobo lwekristalu ye-alumina ene-crystallization enhle, futhi ubudlelwano phakathi kwalaba ababili bufana nobudlelwano phakathi kwekristalu ne-quartz powder.