Cerium oxide is the general term for cerium oxide. Common people have cerium trioxide and cerium dioxide. Cerium trioxide has a hexagonal structure of rare earth sesquioxide, with a melting point of 2210℃ and a boiling point of 3730℃. Sensitive to air. Extraction of cerium trioxide: is in the atmosphere of carbon monoxide, under the temperature of 1250℃ heating cerium dioxide and carbon powder mixture can be prepared, mainly used as a catalyst. Cerium dioxide is the most important, representative cerium oxide, yellow solid, pure white, melting point 2600℃, insoluble in water, insoluble in sulfuric acid, nitric acid. Extraction of cerium dioxide: cerium hydroxide or cerium oxalate can be prepared by heating cerium in the air.