Description

Brown fused alumina powder is brown, made of bauxite and coke ( anthracite ) as main raw materials smelted at 2300℃ in a dumping furnace. Its main chemical components are Al2O3 and TiO2,and it also contains a small amount of SiO2 and Fe2O3 etc. Microhardness is HV 1800-2200. 

The grinding tools made of it is suitable for grinding metals with high tensile strength, such as various universal steel, wrought iron and hard bronze etc. It also can be used to make advanced refractory materials. Yuechi brown corundum has characteristics of high purity, good crystallization, corrosion resistance, no explosion and no cracking etc. The fire resistance temperature reaches to over 1900℃.

Specification

color  brown
crystal shape
Trigonal crystal system
Hexagonal crystal shape
hardness(mohs) ≥9.0
melting point(℃) 2250
max temperature(℃) 1900
true density(g/cm3) ≥3.90
linear expansivity (0-1600℃) 7-9
chemical indexs two nature
size  D50(μm)-- Sedimentation
F230 55.7±3.0
F240 47.5±2.0
F280 39.9±1.5
F320 32.8±1.5
F360 26.7±1.5
F400 21.4±1.0
F500 17.1±1.0
F600 13.7±1.0
F800 11.0±1.0
F1000 9.1±0.8
F1200 7.6±0.5

 

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