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Composition and function of alumina powder

The production process of alumina powder is getting higher and higher, and alumina powder of less than 1 micron can be produced. Nano alumina transparent liquid XZ-LY101 is colorless and transparent. The transparent nano-alumina dispersion liquid uses 5-10 nanometers of alumina. The alumina is a kind of alumina screened out through deep processing of nano-alumina. It is added to various acrylic resins, polyurethane resins, and epoxy resins. In the water-based liquid of melamine resin, silicone acrylic emulsion and other resins, the addition amount is 5% to 10%, which can increase the hardness of the resin, the hardness can reach 6-8H, and it is completely transparent. The nano alumina liquid can be water-based or oily Any solvent can be used for all kinds of glass coating materials, gems, precision instrument materials, etc.

1. In the main component bauxite of bauxite, alumina has the highest content. Industrially, bauxite is purified into alumina by Bayer process, and then converted into aluminum metal by Hall-Heroult process.

2. Alumina is the reason why metal aluminum is not easily corroded in the air. Pure metallic aluminum easily reacts with oxygen in the air to form 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. The crystal form of aluminum emery is suitable for abrasive materials and cutting tools because of its high hardness.

4. Alumina powder is often used as a medium for chromatography

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June 2024
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