Composite oxide having oxygen absorbing and desorbing capability
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United States of America Patent
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Nov 5, 1996
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N/A
app pub date -
Oct 2, 1995
filing date -
Jun 20, 1994
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Abstract
A composite 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 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. to 700.degree. C.
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