Application Of High Purity Alumina Powder

High-purity alumina powder is a white crystalline powder, usually divided into three types: 3N (purity 99.9%), 4N (purity 99.99%) and 5N (purity 99.999%). High-purity alumina powder has good sintering performance, dispersibility and porosity. The application industries of high-purity alumina powder vary according to different varieties.

1. Battery industry. One of the main raw materials for lithium battery ceramic diaphragms.

High-purity nano alumina powder is applied to the positive and negative electrode separators of lithium batteries as a ceramic coating, which plays the role of heat resistance, high temperature resistance and insulation, thereby preventing the power battery from short-circuiting due to excessive temperature and melting of the diaphragm.

2. Polishing abrasives. Abrasives for manufacturing glass, metal, semiconductors and plastics.

High-purity nano alumina powder used for precision polishing has low impurity content, small particle size, high polishing efficiency and high polishing gloss. It is widely used in the precision polishing industry and can meet the precision polishing requirements of products with low impurity content requirements. It is suitable for precision polishing of sapphire, glass, metal, semiconductor, plastic and other materials to achieve mirror effect and not prone to defects.

3. Coating, Rubber, plastic wear-resistant hardener

Adding 10-20% of high-purity nano alumina powder can greatly improve the wear resistance and scratch resistance of the coating, which is 2-5 times higher than the wear resistance of traditional coatings. After adding nano alumina powder to the coating, a very fine, uniform and very hard mesh structure can be formed on the surface of the paint, protecting the polymer paint layer below from damage. The anti-scratch performance of nano-paint is 3 times higher than that of the original paint, and is widely used in automotive paint, etc. Adding nano alumina can significantly improve the hardness of the coating. Adding about 20% can reach 6-7H without affecting the transparency of the coating.