Corundum mullite disc or corundum mullite ceramic disc belongs to corundum mullite ceramic. Corundum mullite disc is produced by sintering of high purity fused corundum, synthetic mullite and chromium oxide. corundum mullite block has high bulk density, high compressive strength, good thermal shocking resistance, and good corrosion resistances to acids and alkali. Corundum mullite disc will not be influenced by H2, CO gases at use. Mullite disc is suitable for various high-temperature furnaces; high purity corundum brick used in zirconia ceramics, fluorescence materials, electronic ceramics, magnetic materials, ceramic powder sintering and petrochemical industry gasifier.