... gravity:2.5-3.2g/cm3 99.998% series high purity aluminum oxide Formula:Al2O3The melting point:2050 Celsius degreeSpecific gravity:2 ... .5-5.0mm) as raw material for sapphire crystal,the quality is very steady,and with good fluidity.Many well-known ... interested in them ,please contact us for more informations. Appearance: high purity, fine granules, well-distributed particle size, odorless, white powder ...