棕剛玉理化性質(zhì)：物理性能晶形三方晶系化學性質(zhì)兩性與酸反應(yīng)在,王水中,和,氫氟酸,中稍有腐蝕與堿反應(yīng)僅與強堿熱溶液稍有反應(yīng)氧化還原效果否密度3,90,g/cm3硬度努譜硬度,2000,-,2200,Kg/mm2莫氏硬度9.0顏色深棕色,煅燒后顏色呈深藍熔點2250,C最高使用溫度1900,C比熱(Cal/g,C),0,26,(20,-,90,C)熱傳導(dǎo)系數(shù)室溫,900,C(Cal/cm3,sec,C)折光率e=1,760,w=1,768(Na,line,)電阻率30,C,300,C,900,C,1600,C(cm)線膨脹系數(shù)7,-,9,(0,-,1600,C)
棕剛玉化學成份GB/T2478-1996 CHEMICAL COMPOSITION OF BROWN ALUMINIUM OXIDE粒度范圍化學成份%（按重量百分比）Al2O3TiO24#-90#94,50-97,001,50-3,80100#-180#≥93,501,50-3,80220#-240#≥92,501,50-3,80
