Black Fused Alumina Has characteristics of moderate hardness,high toughness,
high temperature resistance,and stable thermal stability.
Chemical composition:
1.AL2O3:72-76%   Fe2O3:8-12%   SiO:9-14%   TiO2:3%min
2.AL2O3:80%   Fe2O3:5%   SiO:8%   TiO2:3%min
Size：F60-F100

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