METHOD FOR PRODUCING YTTRIUM OXIDE-STABILIZED ZIRCONIUM OXIDE SOL

WIPO Patent Application WO/2010/071135

A1

Disclosed is a method for producing an yttrium oxide-stabilized zirconium oxide aqueous sol having extremely good transparency, wherein heating conditions are milder than those of conventional methods, and secondary aggregation of obtained colloidal particles rarely occurs. Also disclosed is a method for producing an organic solvent sol. The method for producing an yttrium oxide-stabilized zirconium oxide aqueous sol is characterized by comprising a step wherein a mixed aqueous solution, which is obtained by dissolving a carboxylic acid salt of yttrium and zirconium oxyacetate in water at a Y/(Y + Zr) atomic ratio of 0.10-0.60, is subjected to a hydrothermal treatment at 160-280˚C for two hours or longer.

OTA ISAO (JP)
TSUIHIJI NATSUMI (JP)

PCT/JP2009/070918

June 24, 2010

December 15, 2009

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NISSAN CHEMICAL IND LTD (JP)
OTA ISAO (JP)
TSUIHIJI NATSUMI (JP)

C01G25/00

JP2008184339A	2008-08-14
JP3250243B2	2002-01-28
JP2008184339A	2008-08-14

H. VESTEGHEM ET AL.: "Hydrothermal synthesis of colloidal zirconia", KEY ENGINEERING MATERIALS, vol. 132/136, 1997, pages 129 - 132, XP008157078
HELEN REVERON ET AL.: "Synthesis and Thermal Behaviour of Nanostructured Zr02 Powders Obtained Under Hydrothermal Conditions", JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, vol. 5, no. 10, October 2005 (2005-10-01), pages 1643 - 1650, XP008154085
See also references of EP 2380851A4

HANABUSA, Tsuneo et al. (JP)
Sepal Tsuneo (JP)

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