Yintoni umahluko phakathi kwe-alumina kunye ne-white corundum?

I-alumina yikhompawundi yobulukhuni obuphezulu kunye neqondo lokunyibilika lama-2054 degrees Celsius kunye neqondo lokubila lika-2980 degrees celsius. Ihlala isetyenziselwa ukwenza izinto eziphikisayo. Inxalenye ephambili ye-corundum yi-α-alumina, eyesibini kuphela kwidayimane ebukhuni. I-Ruby kunye nesafire yi-corundum ekumgangatho ophezulu equkethe inani elincinci lee-oxide zetsimbi ezahlukeneyo. I-Ruby ngokuqhelekileyo ibomvu kuba iqulethe i-chromium encinci, kunye nesafire eluhlaza okwesibhakabhaka kuba iqulethe ixabiso elincinci lentsimbi kunye ne-titanium. Ukuya

I-Corundum luhlobo lwekristale ye-alumina ene-crystallization enhle, kwaye ubudlelwane phakathi kwezi zibini bufana nobudlelwane phakathi kwekristale kunye ne-quartz powder.