A high-performance inorganic material with a molecular formula of Al₂O₃ (molecular weight: 101.96), featuring a melting point of 2050°C and boiling point of 2980°C. It finds wide use across key industries: ideal for ceramic film/wear-resistant/plasma-sprayed coatings; suitable for transparent/bioceramics & alumina ceramics; applied in petrochemical catalysts, automotive exhaust purification; works as submicron/nanoscale polishing materials for silicon wafers; serves as raw material for lighting phosphors, high-pressure sodium lamp tubes & LEDs; fits electronics (IC substrates, single-crystal materials) and cosmetics (fillers); also usable as inorganic membrane materials.