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
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High purity & clean finish
Low impurity, no iron contamination; prevents black spots, yellowing or discoloration on polished surfaces.
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Stable hardness & sharpness
Mohs hardness ~9, good self-sharpening; consistent cutting force, high polishing efficiency.
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Smooth surface, less scratch
Uniform particle size distribution; produces fine, uniform finish, easy to achieve high gloss or mirror effect.
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Chemically inert
Resists acid and alkali, does not react with metals, ceramics, glass or semiconductor materials.
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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