Cerium-zirconium mixed oxide and method for manufacturing the same
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United States of America Patent
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Issued Date -
Jun 28, 2007
app pub date -
Dec 27, 2006
filing date -
Dec 28, 2005
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Abandoned
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Abstract
A cerium-zirconium mixed oxide with improved heat resistance of the specific surface area at a high temperature (1000.degree. C.) is provided along with a manufacturing method therefor. This cerium-zirconium mixed oxide comprises of spherical particles 5 to 20 nm in size and rodlike particles 5 to 20 nm in diameter and 30 to 150 nm in length, and preferably has a pore volume of 0.3 cm.sup.3/g or more and a specific surface area of 35 m.sup.2/g or more after 5 hours of heat treatment at 1000.degree. C.
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