What is platelet alumina powder used for?
Platelet alumina powder adopts a unique calcination process, so that its alumina crystals appear in the form of tabular shape after calcining. Then the production process including crushing, moisture, precipitation, drying and other processes to make platelet alumina ultrafine powder. This powder has the advantages of high α-alumina conversion rate, mechanical strength and hardness. Here we mainly discuss the use of flat alumina powder.
First of all, platelet alumina powder is a grinding material and polishing powder with excellent performance.
Its crystal shape is hexagonal flat, which is different from the equal-area or spherical shape of traditional abrasives. This shape makes the abrasive particles parallel to the surface of the workpiece during the grinding movement. That leads to sliding grinding effect, rather than the rolling grinding of traditional abrasives. As a result, it is not easy to cause random scratches on the surface of the workpiece. At the same time, the grinding pressure is evenly distributed on the surface of the flat abrasive. This polishing reduces particle breakage and improves the wear resistance. Therefore, it provides the best grinding efficiency and surface finish. Experiments show that the grinding removal rate of platelet alumina polishing powder can be increased by 10-20%. Thus it achieve rapid grinding and polishing.
1. The typical use of platelet alumina in the field of grinding and polishing is the polishing in semiconductor industry. It is suitable for polishing silicon wafers, GaAs wafers, indium phosphide wafers, and lithium niobate crystals. The cost consumption caused by chip grinding damage is very large, so reducing grinding damage is important for semiconductor wafer grinding. The tabular structure is particularly suitable for applications in this field.
2. Platelet aluminum oxide is suitable for polishing precision components. Such as glass substrates, piezoelectric quartz crystals, compound semiconductor materials, precision ceramic materials, high-end bearing ball bushings, mobile phone mirror sapphire crystals, and optical crystals.
In addition, platelet aluminum oxide powder has good high temperature resistance, thermal conductivity, wear resistance and chemical inertness. So it works as a filler for thermal conductive materials such as thermal conductive potting glue and wear-resistant coatings.
The popular Platelet alumina powder in the market are the Japanese brand FUJIMI PWA15 and the American brand Microgrit WCA15. With the development of localization, the application of platelet alumina 15um from China is becoming Alternative option.
