Compound oxide having oxygen absorbing and desorbing capability and method for preparing same
AssigneeSantoku Metal Industry Co., Ltd.
InventorsTadatoshi Murota, Kazuhiro Yamamoto, Shigeru Aozasa
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Abstract
A compound oxide having oxygen absorbing and desorbing capability contains 4.99-98.99% by weight of cerium oxide, 1-95% by weight of zirconium oxide and 0.01-20% by weight of hafnium oxide. The compound oxide has an oxygen absorbing and desorbing capability of at least 100 .mu.mol/g at 400-700.degree. C. and a specific surface area of at least 10 m.sup.2 /g after heating at 900.degree. C. for 5 hours.
Claims16
A compound oxide having oxygen absorbing and desorbing capability, which comprises 4.99-98.99% by weight of cerium oxide, 1-95% by weight of zirconium oxide and 0.01-20% by weight of hafnium oxide, the compound oxide having an oxygen absorbing and desorbing capability of at least 100 .mu.mol/g at 400.degree.-700.degree. C. and a specific surface area of at least 10 m.sup.2 /g after heating at 900.degree. C. for 5 hours.
Dependencies are inferred from the claim text.