White aluminum oxide polishing powder (also called white corundum polishing powder) is made from high-purity fused alumina (Al₂O₃ ≥ 99.0%), processed through crushing, shaping, purification, and precise grading. It is a high-grade micro‑powder abrasive widely used for precision grinding and mirror polishing.
Key Advantages
High purity & clean finish
Low impurity, no iron contamination; prevents black spots, yellowing or discoloration on polished surfaces.
Stable hardness & sharpness
Mohs hardness ~9, good self-sharpening; consistent cutting force, high polishing efficiency.
Smooth surface, less scratch
Uniform particle size distribution; produces fine, uniform finish, easy to achieve high gloss or mirror effect.
Chemically inert
Resists acid and alkali, does not react with metals, ceramics, glass or semiconductor materials.
Wide compatibility
Suitable for dry polishing, wet polishing, polishing pastes, and vibratory/centrifugal finishing.
Main Applications
1. Metal Polishing
- Stainless steel parts, sanitary ware, precision valves
- Mold steel, tool steel, high-speed steel
- Carbide cutting tools and dies
- Aluminum alloy, copper alloy, titanium alloy components
2. Optical & Electronic Products
- Sapphire watch covers, mobile phone camera lenses
- Optical glass, quartz glass, crystal components
- Ceramic substrates, semiconductor parts
3. Ceramics & Stone
- Technical ceramics, alumina ceramics, zirconia ceramics
- Jade, agate, crystal, gemstone polishing
4. General Industrial Finishing
- Vibratory finishing, tumbling media
- Polishing pastes and grinding suspensions
- Sandblasting for fine surface treatment