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Black Fused Alumina is also known as low
aluminum corundum. It is also a new type
product of polishing material, and it is a
dark gray crystal body made α-Al2O3 and
ferropicotite as main ore in the electric
arc furnace by smelting the bauxite. It has
characteristics of moderate hardness, high
toughness, high temperature resistance, and
stable thermal stability. It is mainly
suitable for free grinding, such as coarse
grinding before electroplating products,
mainly for polishing and sandblasting of
stainless steel, fabricated metal products.
Size:
F8-F1200,0.4-1,1-2,1-3,3-5mm
Black Fused Alumina Chemical Analysis:
|
Specifications |
Main Chemical Composition % |
|
Al2O3 |
Fe2O3 |
SiO2 |
|
BA—1 |
81—85 |
9—11 |
≤8 |
|
BA—2 |
75—80 |
10—12 |
≤10 |
Black Fused Alumina physical properties:
|
Item |
Indicators |
|
Color |
Black |
|
Crystal |
Trigonal system |
|
Hardness (Mohs) |
≥ 9.0 |
|
Melting point (°C) |
2050 |
|
The maximum temperature (°C) |
1850 |
|
True Density (g/cm3) |
≥ 3. 50 |
|
Linear expansion coefficient
(0-1600 °C) |
7-9 |
|
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