Certificate: | ISO9001 |
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Sample: | Sample Could Be Provided |
Model Number: | Black Fused Alumina |
Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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Payment Method: |
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Initial Payment Full Payment |
Currency: | US$ |
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Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Grinding and polishing of stainless steel, optical glass, bamboo or other materials.
For polishing various spare parts: bicycles, sewing-machine, hard metal tools,medical apparatus, timepieces, glass products and stone grinding.
For making abrasive tools: fiber-reinforced cutting wheels, grinding wheels, sand cloth,paper and paste
Grade | Leading indicator | |||
AI2O3 | Fe2O3 | SiO2 | TiO2 | |
A | ≥62 | 6-12 | ≤25 | 2-4 |
B | ≥80 | 4-8 | ≤10 | 2-4 |
Density | maximum service temperature | Hardness(mohs) | Melting point | Application | Size | Crystal shape |
3.5g/cm3 | 1850ºC | 9 | 2050ºC | Polishing, grinding, sanding, sandblasting | 12--320mesh | Trigonal crystal system |
Key differences between various types.
1)Aluminum content is one of the vital differences between white, brown and black corundums. White corundum contains more than 99% aluminum. Black corundum contains 45-75% aluminum. Brown corundum contains 75-94% aluminum.
2) Hardness. White corundum has the highest hardness. Brown corundum has average hardness. The hardness of black corundum considered to be minimal among these three types of corundum.
3) Different colors. Black corundum has metallic black color. Brown corundum is brownish red. White corundum is transparent and has white color.
4) Different Uses. White one is used for the manufacturing of advanced refractory materials and precision polishing and grinding. Brown corundum is used for sandblasting and rust removal. Black corundum is cost effective and mainly used for rough polishing and non-slippery and wear resistant floor aggregates.
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