ceramic foam filter 1.Material:Alumina,Silicon carbide,Zirconia 2.Color:White,Gray-black,Yellow 3.high ... developed three kinds of ceramic foam filters: Alumina foam filter, Silicon carbide foam filter, Zirconia foam filter. Alumina ceramic foam filter : ... White, for molten metal filtering under temperature of 1200 degree.Silicon Carbide ceramic foam filter :Gray-black,for molten metal filtering under ...