Alumina Polishing Powder Al2O3

1. Core Features of Alumina Polishing Powder ✨

1) Extremely High Hardness and Strong Cutting Force: Mohs hardness 9 (second only to diamond and silicon carbide), stable α-Al₂O₃ crystal structure, sharp particle edges, high material removal rate, suitable for efficient polishing of hard materials.

2) High Purity and Low Impurities: Mainstream products have Al₂O₃ ≥ 99%, high-purity grades can reach 99.99%, free from metallic impurities, suitable for precision/ultra-clean environments.

3) Extremely Strong Chemical Stability: Resistant to acids and alkalis, insoluble in water/most organic solvents, does not react with workpieces at room temperature, suitable for various polishing environments.

4) Good Thermal Stability: Melting point approximately 2050–2250℃, does not soften or deform upon heating during polishing friction, long service life. 5) Controllable Particle Size, Adaptable to the Entire Process: Particle size covers 20–45μm (coarse polishing), 4–20μm (medium polishing), 1–4μm (fine polishing), and <1μm (mirror finish), with a narrow particle size distribution, ensuring controllable efficiency and precision.

6) Excellent Self-Sharpening and Long Lifespan: Micro-fragmentation of particles continuously generates new cutting edges, maintaining stable cutting force and ensuring good durability.

7) Excellent Dispersion/Suspension: Combined with dispersants, the slurry is uniform, does not settle, and has good polishing consistency.

2. Main Application Areas of Alumina Polishing Powder

1) Optics and Optoelectronics Industry

- Optical Glass: Camera lenses, prisms, telescopes, eyeglass lenses, achieving high light transmittance, low scratches, and a mirror finish.

- Sapphire: LED substrates, mobile phone camera lenses, watch crystals, ultra-precision polishing.

- Quartz/Crystal: Optical crystals, laser components, high-precision surface treatment.

2) Semiconductors and Electronics

- Silicon Wafer CMP: Ultra-high purity alumina is used for chemical mechanical polishing, ensuring flatness and low contamination, improving chip yield.

- Ceramic Substrates/Packaging: Alumina/alumina ceramics, flattening and mirror finishing.

3) Precision Ceramics and Hard Materials

- Structural Ceramics: Zirconia, alumina ceramics, ceramic cutting tools, bearings, covering rough to fine polishing.

- Wear-Resistant Ceramic Parts: Wear-resistant coatings, ceramic seals, improving surface smoothness and wear resistance.

4) Metal and Alloy Machining

- Stainless Steel, Mold Steel, Aluminum Alloys, Hard Alloys: Deburring, mirror polishing, scratch repair.

- Automotive/Machinery Parts: Engine parts, bearings, valves, high-precision surface treatment.

5) Other High-End Fields

- Jewelry/Jewelry: Precious metal and gemstone polishing, fast shine, no damage.

- Tableware/Kitchenware: Stainless steel and ceramic tableware, mirror and matte finishes.

- Abrasion-resistant coatings/fillers: Improve coating hardness and abrasion resistance.