... sand mold, 3,casting,spraying 4,coating materials. Brown Fused Alumina is used as polishing materials and precision sand mold, casting ... ,spraying and coating materials. It is made by alumina as raw material, which is melted at high tempreture. The ... *3hThermal conductivity W/m,kless than 1.0refractoriness1790 brown fused alumina oxide (made in china )TH-025