Application of Nano Aluminum Oxide Powder As A Flow Aid in Powder Coatings
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Update time : 2023-03-24 09:40:36
Nano aluminum oxide is an inorganic substance with the chemical formula Al2O3, which is a white crystalline powder.
In addition to having many excellent properties such as high hardness, high strength, corrosion resistance, wear resistance, high temperature resistance, high insulation and high oxidation resistance, nano aluminum oxide has more excellent physical and chemical properties than ordinary aluminum oxide by virtue of its strong volume effect, quantum size effect, surface effect and macroscopic quantum tunneling effect. At the same time, nano aluminum oxide also has good compatibility with rubber and plastic, so it has important applications in many fields such as aerospace, national defence, chemical industry and microelectronics, becoming an indispensable functional and structural material in the society.
Positively charged aluminum oxide, for all powder coatings, can be dry mixed before or after fine pulverisation. Due to its positive charge, it is extremely suitable for electrostatic friction application and in some cases can cause frictional electrostatic charges to be applied to products that cannot be frictionally charged. The mixing action reduces the electrostatic charge that impedes flow and aids the deposition of the powder during the application process. The recommended addition rate of nano aluminium oxide is 0.3% of the total formulation. Its unique benefits are due to the controlled size and distribution of the ultra-fine particles in its manufacture, as well as the electrical charge on its own particle surface.
Nano aluminium oxide is used in powder coatings to improve the fluffiness of powder coatings and has a good anti-caking effect. It has good storability for powder coatings used in high temperature and high humidity environments. The addition of nano aluminum oxide is generally 0.3-0.5% and is best added when the finished product is sieved. Nano aluminium trioxide can improve the charged performance of the powder, especially when using friction charged spraying, can significantly improve the powder rate and solve the problem of dead space, while the gloss of the powder coating has no effect.
All the advantages of nano aluminum oxide are that it improves the positively charged nature of electrostatically frictional powders and the addition of very small amounts of fumed silica before the powder coating is finely pulverised can significantly improve the flow of the powder coating. This has no detrimental effect on the electrostatic charge of powder coatings, whether they are positively or negatively charged. Aluminium oxide has a very positive tendency and for this reason this product is often used in powder coatings applied by the electrostatic friction method, not only to increase the electrostatic charge of the powder coating in contact with the PTFE tubing, but also to adjust the flow properties.
Nano alumina-based coatings can form a relatively strong and dense protective coating on the surface of a variety of metals and ceramics, the coating effectively stops welding and protects against high temperatures, the coating has good ease of removal and has no adverse effect on the coated devices. At the same time, the advantages of high melting point, high hardness and good wear resistance of aluminum oxide can also be used to improve the hardness, corrosion resistance and wear resistance of the surface, which can be used in machinery, tools, chemical pipelines and other surface protection. Nano Al2O3 has excellent resistance to proton oxygen stripping ability, used in organic coatings, can significantly improve the oxidation resistance of the coating, and in the coating encountered in the hot and cold environment can transfer stress and thus reduce the generation of cracks.
Preventing agglomeration of alumina nanopowders is an important task in practical applications. This can generally be achieved by changing the drying and washing methods, using ultrasound, changing the precipitating agent, adding surfactants and other methods. With the rapid development of science and technology, the application area of nano alumina will be expanded even more, and the market demand will be increasing, and the application prospect is very broad.
Nano Aluminum Oxide Powder Supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted nano aluminum oxide powder manufacturer and Al2O3 nanopowder supplier with over 12-year-experience. We ship our goods all over the world.
If you are looking for high-quality nano aluminum oxide powder, please feel free to contact us and send an inquiry. ([email protected])
