Silicone, potting adhesive, epoxy resin, plastic, rubber thermal conductivity, thermally conductive plastic, silicone grease, heat dissipation ceramic and other different materials. In practical applications, Al2O3 powder filler can be used alone or mixed with other fillers such as AIN, BN, etc., in intelligent consumer electronics, communication, new energy vehicles, new energy power generation, packaging and sealing, etc.