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Alumina is white crystalline powder manufactured from firing of aluminum hydroxide. It becomes α alumina via various intermediate alumina phases as the temperature increases. α alumina is most generally used among them. α alumina is chemically stable, and has high melting point, high mechanical strength, and high hardness.
It also has various characteristics including high insulation resistance. Therefore, it is widely used for ceramic materials such as potteries and machinery and electrical parts, raw materials for abrasives and refractories, etc.
We carries various alumina products of Nippon Light Metal Co., Ltd., those have proper quality characteristics for various uses and were manufactured under the strict quality management process. Nippon Light Metal Co., Ltd. is a well known manufacturer for alumina with high purity and stable quality.
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| * Characteristics of α alumina |
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| True specific gravity |
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3.98 |
| Melting point (℃) |
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2,050 |
| Hardness : new Mohs sacle |
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12 (old Mohs scale 9) |
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Features and uses
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