Fine zirconium oxide powder and method for producing same

Details Fine zirconium oxide powder and method for producing same Fine zirconium oxide powder and method for producing same

2007-01-02

2007-01-02

Vanoy, Timothy C. (Department: 1754)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S069000, C423S085000

Reexamination Certificate

active

10911339

ABSTRACT:
There are provided a method for producing a fine zirconium oxide powder which has a narrower particle size distribution than that of conventional zirconium oxide powders and which is capable of lowering the starting temperature in the sintering reaction of a reactant to which the fine zirconium oxide powder is added. When a hydrated zirconium is calcined to be dispersed in a solvent with a dispersing agent, an alcohol (e.g., IPA or t-butanol) having a branched chain structure, not a straight chain structure, is used as the solvent, and a dicarboxylic acid (e.g., maleic acid or oxalic acid) having two carboxyl groups in its molecule is used as the dispersing agent. Thus, a fine zirconium oxide powder having a narrow particle size distribution and a small particle size at 90 vol % is obtained.

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patent: 6524548 (2003-02-01), Mangold et al.
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patent: 2005/0118095 (2005-06-01), Kim et al.
patent: 11-35323 (1999-02-01), None

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