is a high-purity alumina powder (α-Al₂O₃ ≥ 99.5%), which is made of industrial alumina as the basic raw material, through strict control of the crystal transformation process, high-temperature calcination and fine grinding. Its crystal form is the most thermodynamically stable α phase, and the particles are mostly irregular spherical or blocky, with uniform particle size distribution, which can be controlled between 0.5–5μm, and has the characteristics of high whiteness, low impurities, high hardness, and low specific surface area.

This product has high density, excellent thermal stability, strong chemical inertness, good insulation and wear resistance, and is widely used in base material addition or main material preparation of various high-temperature and high-strength materials. It is suitable for a variety of high-end industrial fields, such as electronic ceramics, optical glass, and circuit substrates.

Its notable features include: pure crystal form, low sintering shrinkage, good electrical insulation performance, and excellent tolerance to acid and alkali corrosion.