Brown Fused Alumina with Middle Temperature Treatment
This kind of Brown Fused Alumina grains is calcined at the high temperature, and with the anneal treatment.It is characterized by very low coefficient of linear expansion,very good hydrophilicity, good toughness and high hardness, producing the sintered grinding tools that is characterized by deep blue color after firing, without resillage, without rust and so on. So our this kind of product increase the precision and grinding ability of the grinding tools in the using course. Brown Fused Alumina with middle temperature treatment is applicable to make high quality bonded abrasives.

Chemical Composition
Purpose Specification Chemical composition Magnetic material content
Al2O3 Fe2O3 SiO2 TiO2
For abrasive F 48 0 95.0 Min 0.3 Max 1.5 Max 3.0 Max 0.05 Max
90 150 94.0 Min 0.03 Max
180 240 93.0 Min 0.3 Max 1.5 Max 3.0 Max 0.02 Max


Physical Properties
Color Cambridge Blue
Crystal Form Alpha alumina trigonal system
Hardness 9.0 Mohs scale
Melting Temperature About 2050
Maximum Use Temperature 1800
True Density g cm3 3.90
Magnetic Material 0.0082