1High purity 2Ultra-fine 3Average distribution of particle size ... prompt delivery after more than ten years development.High purity ultra-fine alumina is a kind of white odorless powder, ... , filler, catalyst support, desiccant, adsorbent, depurant, high pressure sodium lamps, etc.Physical properties:ItemCrystalAL2O3(%)≥D50(μm ... products, feel free to contact us. High-purity ultra-fine alumina powder