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Refractory alumina powder

1. High temperature resistance: Refractory alumina powder has a high melting point, can withstand high temperatures, and can maintain stable performance in a long time high temperature environment.

2. Good oxidation performance: refractory aluminum oxide powder is not easy to be oxidized, even in high temperature oxidation atmosphere will not be oxidized and burned.

3. Good chemical stability: refractory aluminum oxide powder does not have obvious chemical reactions in neutral and acidic environments and can exist stably.

4. Good electrical insulation performance: Refractory alumina powder is an excellent insulating material, which is widely used in the field of electrical engineering.

5. Good mechanical properties: Refractory alumina powder has a certain compressive strength and wear resistance, suitable for the production of various shapes of refractory materials, such as bricks, pipes, ceramic parts, etc.

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Product nature

Refractory alumina powder is a powder with molecular formula Al2O3 and molecular weight of 101.96. Its main properties include:

  1. Physical properties: The specific gravity of refractory alumina powder is 3.95-4.1g/cm³, the melting point is 2054℃, the boiling point is 2980℃, and the coefficient of thermal expansion is 7.1×10-6/℃.

  2. Chemical properties: Refractory alumina powder can react with acid, alkali, salt and other substances, but it is not easy to react under neutral conditions. Its main chemical reactions are as follows:

    Al2O3 + 2NaOH → 2NaAlO2 + H2O

    Al2O3 + 3C → 2Al + 3CO

  3. Other properties: Refractory alumina powder has good insulation properties, wear resistance, high temperature resistance and compressive strength, and can maintain stable performance in high temperature and corrosive environment.


Scope of application


  1. Refractory manufacturing: Refractory alumina powder can be made into a variety of shapes of refractory materials, such as refractory bricks, refractory pipes, ceramic parts, etc., used for high-temperature equipment lining, heat insulation and protection.

  2. Electronic devices: Refractory alumina powder has excellent electrical insulation properties and is widely used in the manufacture of electronic devices, such as semiconductor industry and integrated circuits.

  3. Optical instruments: Refractory alumina powder has high transparency and good anti-wear properties, and is widely used in optical instruments, lenses, optical fibers and other fields.

  4. Chemical, metallurgy: Refractory alumina powder as a catalyst or catalytic carrier, is widely used in chemical and metallurgical fields, such as synthetic ammonia, petroleum processing, etc.

  5. Building materials: Refractory alumina powder can also be used to manufacture building materials, such as high temperature curing agent, special cement and so on.

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