Zibo Xiangrun and Shandong Bairui professionally manufacture γ Alumina powder.

γ Alumina powder is γ AL2O3 powder.

γ AL2O3 powder has a lot of application, like adsorbent, catalyst carrier, decloration. γ alumina  powder is insoluble in water, soluble in strong acid or alkali solution, it is heated to 1200 ° C on all converted to α-type alumina.γ  alumina is a porous material, the inner surface area per gram up to 100 square meters, high activity and high adsorption capacity. Industrial products are often colorless or microstrip pink cylindrical particles, good pressure.

Nano-sized γ-Al₂O₃ powder with controlled porosity and pore size distribution, a precipitation/digestion route was exploited to generate a boehmite precursor having a narrow size distribution of spherical nano-sized particles: size 3.5 nm with surface area ～261 m²/g, average pore diameter of 4.86 nm, and pore volume ～0.377 cm³/g. In this route, aqueous solution of aluminum nitrate and sodium carbonate were added simultaneously drop by drop to a well-stirred 200 ml volume of deionized water (taken in a round-bottom flask) at 70 °C to precipitate boehmite precursor in the pH range of 7.5–8.5 after digestion at the same temperature for 3 h. The boehmite precursor thus obtained is further washed with deionized water first to avoid ‘Na’ contamination and then by ethanol/acetone. The digested precipitate was finally air dried at room temperature. The calcinations of as-dried boehmite precursor at 550 °C/5 h in air produced porous nano-sized γ-Al₂O₃ powder particles having spherical shape with size of 4.5 nm. These powder particles showed BET surface surface area ～220 m²/g with average pore diameter of 7.0 nm and pore volume ～0.487 cm³/g. However, room temperature precipitation/digestion produces non-crystalline boehmite that gave poorly crystallized γ-Al₂O₃ powder particles with lower surface area ～133.90 m²/g; these had higher average pore diameter of 26.67 nm with pore volume of 1.02 cm³/g. In methanol conversion to DME reaction, γ-Al₂O₃ catalyst made from precipitation/digestion at 70 °C gave a similar yield of DME when compared with the yield for γ-Al₂O₃ prepared from commercial Catapal-B boehmite sample.