Product Introduction:
Brown Fused Alumina is provided by Shenzhen Kaida Industry Co.,Ltd.,a major Non-ferrous Metal supplier in Minerals, Metals & Materials wholesale industry in China.You can check out the specification of Brown Fused Alumina below or get any optional result clicking into the following keywords Brown Fused Alumina , China Brown Fused Alumina supplier , Brown Fused Alumina manufacturer , Find Mining Minerals & Metals made in china products , Aluminum china supplier.Shenzhen Kaida Industry Co. and you can check the authentications and testimonials of Brown Fused Alumina .
Description:
Brown Fused Alumina
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Brown fused alumina is made from high quality bauxite by fusing in an electric arc furnace at high temperature. It has good toughness and high hardness. It is suitable for manufacturing of vitrified and resin bonded tools, and for lapping polishing and sand blasting. It can be also used to make superior refractory products.
Chemical & Physical Properties
Crystal Form
Alpha alumina trigonal system
Chemical nature
Amphoteric
Reaction with acids
Subject to mild attack by aqua and/or hydrofluoric acid
Reaction with Alkalies
Very slight with strong hot solution only
Oxidation-reduction effects
None
True Density(g/cm3)
3.97
Hardness
Knoop (kg/cm2)
2000-2200
Moh’s
9.0
Color
Dark Brown
Color after firing
Light blue
Melting point
2000°C
Max Usable temperature
1900°C
Specific heat (cal/g.°C)
0.26(20-29°C)
Coefficient of thermal conductivity （cal/cm2.sec.°C)
Room temperature
900°C
0.047
0.013
Electrical resistivity (Wcm)
30°C
300°C
900oC 1600°C
1016
1013
105
104
Coefficient of liner expansion (x10-6)
7-9(0-1600°C)
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