Composite oxide having oxygen absorbing and desorbing capability

Details Composite oxide having oxygen absorbing and desorbing capability Composite oxide having oxygen absorbing and desorbing capability

1995-10-02

1996-12-03

Langel, Wayne

Chemistry of inorganic compounds

Rare earth compound

264 60, 423579, 502304, C01F 1700, C01B 1300, C04B 3548

Patent

active

055805361

ABSTRACT:
A composite oxide having oxygen absorbing and desorbing capability contains 4.99-98.89% by weight of cerium oxide, 1-95% by weight of zirconium oxide, 0.01-20% by weight of hafnium oxide, and 0.1-10% by weight of an additional metal oxide selected from titanium oxide, tungsten oxide, nickel oxide, copper oxide, iron oxide, aluminum oxide, silicon oxide, beryllium oxide, magnesium oxide, calcium oxide, strontium oxide, barium oxide, oxides of rare earth metals other than cerium, and mixtures thereof. The composite oxide includes .PHI. phase as a crystal phase, and has oxygen absorbing and desorbing capability of at least 100 .mu.mol/g at 400.degree.-700.degree. C. The composite oxide is prepared by the wet method or by the dry method.

REFERENCES:
patent: 5019366 (1991-05-01), Sakai
patent: 5292496 (1994-03-01), Nagashima et al.

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