Nano alumina powder is widely used in chemical industry, medicine, catalyst and its carrier, ceramics and other fields because of its special properties.
1. In the application of ceramics, precision ceramics made of nano-alumina powder have the plasticity and toughness similar to metal, light weight, and greatly improved strength. Adding a small amount of micron or nano-alumina into the conventional ceramic matrix can greatly improve the mechanical properties of materials, improve the toughness of ceramics, and reduce its sintering temperature.
2. Nano alumina powder bioceramics basically do not corrode in the physiological environment, and have good structural compatibility. The new tissue grows into the continuous pores on the surface of porous ceramics, and has high binding strength with the body tissue, and has high strength, low friction coefficient, low wear rate and other characteristics. Therefore, it is widely used in clinic. As a new medical material, nano-alumina has been used to make load-bearing artificial bone, dental root implant, drug release carrier, etc; We have also successfully carried out reconstruction of maxillofacial bone defects, orthopedic and repair of facial features, etc.
3. As a surface protective layer material, spraying nano-alumina particles on the surface of metals, ceramics, plastics and other materials can significantly improve the surface strength, wear resistance and corrosion resistance.
4. Optical material: nano-alumina can absorb ultraviolet light, and under the excitation of certain wavelengths of light, it can produce light waves of wavelength related to particle size. Alumina can be sintered into transparent ceramics, which can be used as the material of high-pressure sodium lamp tubes; It can be used as a protective film for the phosphor layer in compact fluorescent lamps; It can also be compounded with rare earth phosphor to make luminescent materials for fluorescent tubes, which can improve the lamp life. In addition, nano-alumina porous film has infrared absorption performance, and can be made into stealth materials for military use; It can be used as ultraviolet shielding material and cosmetics additive by its absorption effect of 80 nm ultraviolet light.
5. The catalytic function of nano-alumina as catalyst and its carrier is one of the most important new uses. The specific surface of nanometer powder is large, and the performance of catalyst and catalyst carrier made of nanometer powder is several times higher than that of ordinary catalytic materials.
6. Electronic industry: nano-alumina has good electrical insulation, chemical durability, heat resistance, strong radiation resistance, high dielectric constant, flat and uniform surface, and can be used as a substrate material for semiconductor materials and large-scale integrated circuits, widely used in microelectronics, electronics and information industries.
7. Coating and paint industry: nano-alumina has good wear resistance. Adding it to the coating and paint film can improve the wear resistance and scratch resistance of the coating
8. Polishing material: nano-alumina has high hardness and is a common abrasive. It can be used for mirror polishing of artificial gemstones, stones, marble, granite surfaces, aluminum, copper, stainless steel, titanium, cast iron and other metal products, paint mirror polishing, resin polishing, metallographic analysis, optical polishing, etc.