A high-purity white fluffy powder with a narrow particle size distribution, boasting stable crystal phase, high hardness, excellent dimensional stability, and strong heat resistance—plus standout reinforcement/toughening, thermal conductivity, and insulation. Widely used in coatings, precision polishing, plastics, rubber, ceramics, and new energy batteries: it boosts ceramics’ density, smoothness, thermal fatigue resistance, fracture toughness, and creep resistance, while enhancing polymer wear resistance. It also works as a high-performance far-infrared emitter for chemical fibers, and its high resistivity & good insulation make it fit for YAG laser crystal key components and integrated circuit substrates.