Fused Raw Material: Silicon carbide, Fused alumina, Fused mullite, Fused spinel, Fused zirconia, Fused zirconia mullite, Fused alumina zirconia, Fused cordierite, Fused magnesia, Fused silica Sintered Raw Material: Sintered alumina, Calcined alumina, Alumina hydrate, Synthetic mullite, Magnesia clinker Natural Raw Material: Zircon sand, Zircon Flour, Silica sand, Agalmatolite, Calcium carbonate, Bentonite Other Raw Material: Ferrosilicon nitride, Alumina cement, Boron carbide, Phenolic resin, various metallic powders, various binders Sintered Material: Alumina, Silicon nitride, Boron nitride, Silicon carbide, other composite, Refractory