Cerium oxide is faint brown powder or faint yellow powder of CaF2 structure, which is hard to melt. Common oxides of cerium is cerium(III) oxide and cerium dioxide. Cerium dioxide is most important and typical oxide of cerium. Cerium(III) oxide has hexagonal structure of rare earth sesquioxide, which is mainly for catalysts.
Ceria is mainly for polishing agent of lens. Rare earth polishing powder get wide applications in polishing of camera, teletube, spectecles glasses, which is also for glass industry.
In glass industry, ceria combine with titanium dioxide, which make glass show yellow. it use for glass decolorizing, which have high temperature stability, low cost and nonabsorption of visible light and other advantages. Additionally cerium(IV) oxide add into glass for building and automotive glass, which can reduce light transmittance of ultraviolet light.
Ceric dioxide is raw material for production of rare earth luminescent material. It use as activating agent in luminescent material rare earth trichromatic phosphor of energy saving lamp and fluorescent powder of indicator light and radiation detector.
Cerium(IV) oxide is raw material in ceramic glaze and electronic industry as infiltration agent of piezoelectric ceramics. It is also as sensitizer of semiconductor material, advanced pigment and photosensitive glass, purifier of automobile exhaust.