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Black corundum 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 ¦Á-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.
The specifications as below:
Specifications Main Chemical Composition %
Al2O3 Fe2O3 SiO2
BA¡ª¢ñ 81¡ª85 9¡ª11 ¡Ü8
BA¡ª¢ò 75¡ª80 10¡ª12 ¡Ü10
Item Indicators
Color Black
Crystal Trigonal system
Hardness (Mohs) ¡Ý 9.0
Melting point (℃) 2050
The maximum temperature (℃) 1850
True Density (g/cm3) ¡Ý 3. 50
Linear expansion coefficient (0-1600 ℃) 7-9
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| Company: |
Wenxian Hengsheng Water Purification Materials Co.,Ltd
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| Contact: |
Ms. LI Angie |
| Address: |
Jianshe Road |
| Postcode: |
451200 |
| Tel: |
86-0371-15838013780 |
| Fax: |
86-0371-69570660 |
| E-mail: |
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