High‑Purity Alpha Alumina Micropowder (α‑Al₂O₃) is manufactured from premium aluminium hydroxide through high‑temperature calcination, controlled crystal growth, ultrafine grinding and multi‑stage air classification. The stable alpha crystal structure delivers high hardness, excellent chemical inertness and uniform particle morphology. Without surface modification, this alumina micropowder is suitable for precision polishing applications as well as wear‑resistant reinforcement within coating and

Product Detail

Product DetailsThis high‑purity alpha alumina micropowder adopts strictly controlled high‑temperature calcination technology to form dense α‑alumina crystal grains. Calcination temperature is precisely regulated to adjust crystal size and micro‑hardness of individual particles. After calcination, raw clinker goes through multiple cycles of ultrafine pulverization followed by sophisticated air‑classification to eliminate over‑sized grit and coarse agglomerates. Rigorous particle‑size grading prevents large hard particles that would produce deep scratches on precision workpiece surfaces.

The product features high alumina content, low silica, iron and alkali‑metal impurities, good whiteness, high Mohs hardness and outstanding resistance against acid and alkaline corrosion. When used as precision polishing abrasive, the sharp, fine micro‑crystal grains provide moderate, consistent cutting capacity. It removes micro‑defects, grinding traces and oxidation layers from workpieces. It is applicable for polishing of optical glass, sapphire substrates, semiconductor components, hard ceramics, precision moulds and high‑end metal parts, helping to obtain ultra‑fine mirror‑like finished surfaces.

When deployed as wear‑resistant filler, the rigid alumina microparticles disperse inside coating, plastic and composite systems. After curing or moulding, these hard mineral particles build up a rigid anti‑wear network within the material matrix. They effectively enhance surface hardness, scratch resistance and friction resistance, extending the service life of finished plastic components and protective coatings. It can be incorporated into anti‑wear engineering plastics, heavy‑duty industrial protective coatings, ceramic composite materials and rubber anti‑wear compounds.

Since the powder exhibits inherent hydrophilic properties, compatibility adjustment via suitable coupling agents is recommended before compounding with organic resin systems.

Packaging is 25 kg moisture‑proof woven bags with inner polyethylene liner. Keep packaging tightly sealed during transportation and warehouse storage to avoid moisture absorption and secondary agglomeration. Store in cool, dry indoor conditions. Do not stack pallets excessively high to avoid bag rupture. Operators need to wear dust‑proof masks and protective gloves during powder handling.

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High-Purity Alpha Alumina Micropowder (α-Al2O3) CAS 1344-28-1, Precision Polishing Abrasive and Wear-Resistant Filler

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.