Cerium and zirconium oxides, mixed oxides and solid solutions ha

Details Cerium and zirconium oxides, mixed oxides and solid solutions ha Cerium and zirconium oxides, mixed oxides and solid solutions ha

1996-10-15

1998-05-05

Marcheschi, Michael

Compositions: ceramic

Ceramic compositions

Refractory

501152, 423263, 423265, 423592, 423593, 423608, C04B 3548, C01G 5700, C01G 2502, C01F 1700

Patent

active

057474010

ABSTRACT:
Mixed oxides of cerium and zirconium as well as solid solutions and cerium oxides are produced having improved thermal stability. The process involves the formation of cerium and zirconium oxides, mixed oxides and solid solutions by methods such as co-thermohydrolysis and co-precipitation, followed by washing or impregnating with an alkoxylated compound having greater than 2 carbon atoms. After the washing or impregnating step, the mixture is calcined to form oxides having very high surface area and oxygen storage capacity. The improved thermal stability of the oxides makes them advantageous for use in applications such as catalytic converters.

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Jones S.L. and C.J. Norman, "Dehydrogenation of Hydrous Zirconia with Methanol," J. Am. Ceram. Soc. 71, 4, c-190-191, 1988. (no month).

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