Txhais: Dawb corundum yog ib qho kev ua kom muaj kev sib cav sib ceg ua los ntawm cov khoom siv alumina thiab smelted ntawm qhov kub ntawm lub tshuab hluav taws xob tshuab hluav taws xob {}}
Hardness Hardness: Mohs hardness yog 9 {. 0, thib ob tsuas yog pob zeb diamond, thiab kev sib tsoo muaj peev xwm thiab muaj peev xwm tshem tawm cov txheej saum npoo ntawm cov khoom.
Kev Coj Zoo Kev Kuj: Cov qauv duab particle tuaj yeem tswj tau thaum lub sijhawm sib tsoo, nws tsis yooj yim hnav, thiab lub cuab tam lub neej yog txuas ntxiv .
Cov tshuaj muaj zog ruaj khov: nws tsis nti nrog cov kua qaub thiab alkalis ntawm qhov siab thiab qhov chaw kub thiab yog haum rau ntau qhov chaw ua tiav {}}}
Zoo tus kheej-Hliav: cov lus yuav cia li txuas lawv cov npoo ntse thaum cov txheej txheem sib tsoo los tswj cov txheej txheem kev sib tsoo kom muaj kev sib tsoo zoo {}}
