Product Description
White Fused Alumina (WA) polishing powder is a high-purity abrasive material manufactured from high-grade alumina powder through electric fusion, crystallization, crushing, grinding, and precision classification. It features high hardness, sharpness, self-sharpening ability, low impurity content, and good chemical stability.
It is widely used in precision polishing, lapping, and surface finishing applications, providing high material removal rate, smooth surface finish, and minimal scratching.
| Typical Chemical composition | |
| AL2O3 | 99.3%min |
| SiO2 | 0.06% |
| Na2O | 0.3%max |
| Fe2O3 | 0.05%max |
| CaO | 0.04%max |
| MgO | 0.01%max |
| K2O | 0.02#max |
| Typical physical properties | |
| Hardness: | Mohs:9.0 |
| Maximum service temperature: | 1900 ℃ |
| Melting Point: | 2250 ℃ |
| Specific Gravity: | 3.95g/cm3 |
| Volume density | 3.6g/cm3 |
| Bulk density(LPD): | 1.75-1.95 g/cm3 |
| Color: | White |
| Particle shape: | Angular |
| Available size: | |
| FEPA | F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 |
| JIS | 240# 280# 320# 360# 400# 500# 600# 700# 800# 1000# 1200# 1500# 2000# 2500# 3000# 4000# 6000# 8000# 10000# |
Key Features
- High purity α‑Al₂O₃
- High hardness and wear resistance
- Narrow particle size distribution
- Low impurity (low Na₂O, Fe₂O₃)
- Excellent dispersion and suspension
- Suitable for wet and dry polishing
Typical Applications
- Wafer polishing (semiconductor, sapphire, silicon)
- Optical glass & ceramic polishing
- Fiber optic connector polishing
- Precision metal components polishing
- Superhard material processing