... sample preparation, etc. Magnesium oxide ceramic crucible (1) Material: MgO 90;MgO 96;MgO 99 98%, 99%, 99.4%, 99.8(2) Product ... industry etc.(3) Application:Fireproof material, refractory, magnesium oxide bricks, MgO board, abrasive, fertilizer, water retention material, feed additive, paper making, etc ...