Plate Calcined Alumina polishing powder is made of high-quality industrial alumina powder as raw material.
The alumina purity of the plate alumina is more than 99%, and it has the characteristics of heat resistance, acid and alkali corrosion resistance and high hardness. Different from the traditional abrasive spherical particles, the bottom surface of the flat alumina is flat, and the particles fit the surface of the workpiece during grinding, which produces a sliding grinding effect, which avoids the sharp corners of the particles from scratching the surface of the workpiece. On the other hand, the plate alumina in grinding, the grinding pressure is evenly distributed on the surface of the particles, the particles are not easily broken, and the wear resistance is improved, thereby improving the grinding efficiency and surface finish.
Chemical composition
| Chemical | Guarantee Value | Typical Value |
| Al2O3 | ≥99.0% | 99.36% |
| SiO2 | ＜0.2% | 0.017% |
| Fe2O3 | ＜0.1% | 0.03% |
| Na2O | ＜0.6% | 0.35% |
Physical properties
| Material | α-Al2O3 |
| Color | White |
| Specific gravity | ≥3.9g/cm3 |
| Mohs’Hardness | 9.0 |
Applications:
1) Electronics industry: grinding and polishing of semiconductor monocrystalline silicon wafers, quartz quartz crystals, compound semiconductors (crystalline gallium, phosphating nano).
2) Glass industry: grinding and processing of crystal, quartz glass, kinescope glass shell screen, optical glass, liquid crystal display (LCD) glass substrate, and quartz crystal.
3) Coating industry: special coatings and fillers for plasma spraying.
4) Metal and ceramic processing industry: precision ceramic materials, sintered ceramic raw materials, high-grade high-temperature coatings, etc.