one α- Aluminum oxide, also known as nano aluminum oxide, exhibits a white fluffy powder state with a crystal form of xz-L14 α Type. The particle size is 20nm; Specific surface area ≥ 50m/g. Uniform particle size distribution, high purity and high dispersion. It has low specific surface area and high temperature resistant inertia, but it does not belong to Activated alumina and has almost no catalytic activity.