... : GB/T1614-99 Industrial Grade ISO 9000 Barium carbonate 99.2% min used in barium salt,optical glass ,making ceramic, brick,tile Super quality ... , ceramics, tile, water purifying, kinescope glass shell, optical glass, fluorescent light glass, construction material and making other barium salts5) Barium Carbonate Packing: in 25kg or 50kg ...