Magnesium aluminate is a kind of non-toxic, tasteless, to breathing and skin without stimulation, good thermal stability, easy to use low temperature synthetic materials, low expansion coefficient, good melt, it is mainly used in the plastic industry flame retardant and smoke inhibitors, is an alternative to antimony oxide environmental protection products, can effectively improve the thermal stability and photostability, etc. Mainly used in special textile, engineering plastics, a variety of natural rubber and synthetic rubber, coatings, ceramic glaze, electronic products shell, chips, copper clad plate and other plastic products. In ceramics, glass, ft and other industries, can replace some valuable raw materials, such as zinc oxide, boric acid, borax, red Dan, etc., the application of high cost performance.