... and the production of high purity alumina powder, high purity alumina pellet, high purity alumina ball, LED sapphire crystal materials since ... process from high purity alumina raw materials to high purity alumina pellet, high purity alumina ball and the flame ... ideal material of the sapphire crystal growth by kyropoulos.Alumina Applications: sapphire grower, Precision polishing materials, filler, ...