Njerwa za corundum zosakanikirana ndi galasi losungunuka

Njerwa yoyera yoyera ya corundum ndi α-AL2O3, yomwe ndi ya trigonal crystal system. Amapezeka ndi kusungunula alumina wamafakitala kutentha kwambiri mu ng’anjo yamagetsi yamagetsi, kuzirala ndi crystallization kukhala ingots, kenako kuphwanya, kusankha, kukonza ndikuwunika. Ndi khola limodzi mwa mitundu yambiri ya alumina. Ili ndi malo osungunuka kwambiri (2030), kachulukidwe kakang’ono (3.99 ~ 4.0g / cm3), kapangidwe kake, mawonekedwe abwino amadzimadzi, koyefishienti kakang’ono kofikira (86 × 10-7 /) ndi yunifolomu. Ndi amphoteric oxide, yomwe nthawi zambiri imakhala yopanda mchere kapena yosalowerera kutentha, ndipo imakhala ndi bata labwino. Chifukwa chake, yoyera yoyera corundum ndichinthu chotsitsimutsa pakupanga ndalama. Zida zophatikizika zoyera za corundum zimakhala ndi mchere wambiri komanso zotsika mtengo, zomwe ndizoyenera kusankha ndikukweza.

Zolemba zathupi ndi zamankhwala zamatayala osakanikirana ndi galasi losungunuka ndi galasi: