COMPOSITE OXIDE POWDER AND METHOD FOR PRODUCTION THEREOF

WIPO Patent Application WO/2019/177004

A1

Composite oxide fine particles are produced by a sol-gel method under conditions that impede the production of coarse particles and aggregated particles, and coarse particles and aggregated particles are then removed by wet filtration using a filter. A salt is then introduced into a dispersion of the composite oxide fine particles and aggregates of weakly aggregated composite oxide fine particles are produced in the dispersion. Solid-liquid separation is carried out on the composite oxide fine particle dispersion in which such aggregates have been produced, and drying is then performed. Pulverization is easily performed because strongly aggregated masses are not produced during drying. Composite oxide fine particles not containing coarse particles or aggregated particles can thus be obtained. In addition, the amount of coarse particles can be further reduced using a known comminution means, e.g., a ball mill or jet mill.

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FUJIOKA HIROMASA (JP)
TAIRA HIROAKI (JP)
TANAKA OSAMU (JP)

PCT/JP2019/010218

September 19, 2019

March 13, 2019

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TOKUYAMA CORP (JP)

C01B33/12; C01B33/148

WO2015016359A1

2015-02-05

JP2012006823A	2012-01-12
JP2016190770A	2016-11-10
JP2003252616A	2003-09-10
JP2007230789A	2007-09-13
JPS6042218A	1985-03-06
JP2003252616A	2003-09-10
JP2012006823A	2012-01-12
JP2008019157A	2008-01-31

See also references of EP 3747831A4

MAEDA & PARTNERS (JP)

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