• Categories:Industry News
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• Time of issue:2019-02-27
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(Summary description)Alumina powder has a large surface area and high surface activity. The particles are prone to agglomeration. Choosing an appropriate surfactant (dispersant) can reduce the surface activity of the particles and avoid the effect of agglomeration between particles. Do you know that high-purity alumina powder is more suitable for those aspects?

1. High-purity alumina powder is often used as a medium for chromatography.

2. High-purity alumina powder is the reason why metal aluminum is not easily corroded in the air. Pure metal aluminum easily reacts with oxygen in the air, forming a thin aluminum oxide film covering the surface of aluminum exposed to the air. This aluminum oxide film can prevent aluminum from being oxidized further. The thickness and properties of this oxide film can be enhanced by a process called anodic treatment (anodic corrosion protection).

3. Aluminum is a good conductor of electricity and heat, while high-purity alumina powder is an insulator of electricity and heat. Its crystal form corundum is suitable for abrasive materials and cutting tools because of its high hardness.

4. It can be used as an emergency brake device for high-speed railway trains (spraying high-purity alumina powder on the rails to increase the friction of the rails).

The above is the introduction about the application of high-purity alumina powder. Through the above points, unnecessary waste can be avoided and real value for money.