Barium fluoride molecular formula: BaF2, molecular weight: 175.3238, alias: piperazine, appears as colorless transparent cubic crystals. Density (g/mL, 25/4°C): 4.89, melting point 1368°C, boiling point (°C, normal pressure): 2272, refractive index 1.471, soluble in hydrochloric acid, nitric acid, hydrofluoric acid, and ammonium chloride solution, slightly soluble in water; obtained by reacting barium carbonate with hydrofluoric acid; characterized by good moisture resistance, high operating temperature, and excellent luminescent properties. Main uses: used as a preservative, metal heat treatment, ceramics, enamel, glass manufacturing, metallurgy, instrumentation industry; used in manufacturing motor brushes, optical glass, vacuum coating, infrared-transparent thin films, optical fibers, laser generators, welding fluxes, solid lubricants, coatings, and enamels; used as a wood preservative and insecticide; used as window materials or other optical components for devices and complete machines such as carbon dioxide equipment; barium fluoride crystals with slow scintillation light component suppression filters can be used in nuclear medicine, high-energy physics, geophysical exploration, and gamma-ray astronomy. The company's annual output is 8,000 tons.