Mainly used for manufacturing microwave magnetic materials for military use and important materials (single crystal; yttrium iron garnet, yttrium aluminum garnet composite oxide, etc.) are also used as fluorescent powder and other high brightness CRT glass coatings, ceramic materials, additives, big screen TV optical. Also used in the manufacture of film capacitors and special refractories, as well as high pressure mercury lamps, lasers, storage devices, such as magnetic bubble material.