Zirconium oxide-titanium oxide composite sol and production method thereof

Patent metadata

Field	Value
Publication number	US-2016229751-A1
Application number	US-201415029440-A
Country	US
Kind code	A1
Filing date	Sep 1, 2014
Priority date	Oct 18, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

The present invention provides a zirconium oxide-titanium oxide composite sol comprising single nano-level, monodisperse, and amorphous zirconium oxide-titanium oxide composite nanoparticles.
Specifically, the present invention provides a zirconium oxide-titanium oxide composite sol comprising zirconium oxide-titanium oxide composite nanoparticles dispersed in a dispersion medium;
wherein the zirconium oxide-titanium oxide composite nanoparticles have a ZrO 2 /TiO 2 composition ratio of 95/5 to 50/50, and a primary particle diameter of 10 nm or less, and the dispersion medium is a polar dispersion medium.

First claim

1 . A zirconium oxide-titanium oxide composite sol comprising zirconium oxide-titanium oxide composite nanoparticles dispersed in a dispersion medium;
wherein the zirconium oxide-titanium oxide composite nanoparticles have a ZrO 2 /TiO 2 composition ratio of 95/5 to 50/50, and a primary particle diameter of 10 nm or less, and the dispersion medium is a polar dispersion medium.

2 . The zirconium oxide-titanium oxide composite sol according to claim 1 , wherein the composite sol has a haze value of 20% or less.

3 . The zirconium oxide-titanium oxide composite sol according to claim 1 , wherein both zirconium oxide and titanium oxide contained in the zirconium oxide-titanium oxide composite nanoparticles have an amorphous crystal structure.

4 . A method for producing a zirconium oxide-titanium oxide composite sol comprising zirconium oxide-titanium oxide composite nanoparticles dispersed in a dispersion medium, the method comprising:
(1) step 1 of mixing a zirconitum salt solution and a titanium salt solution so that the ZrO 2 /TiO 2 composition ratio in terms of oxide is 95/5 to 50/50, thereby obtaining a mixed solution; (2) step 2 of adding a base to the mixed solution to thereby obtain a zirconium-titanium composite hydroxide; (3) step 3 of dispersing the zirconium-titanium composite hydroxide in a polar dispersion medium to thereby obtain a dispersion; (4) step 4 of adding an acid to the dispersion to thereby obtain an acid dispersion; and (5) step 5 of heating the acid dispersion under reflux at 90 to 120° C. to thereby obtain a zirconium oxide-titanium oxide composite sol.

5 . The zirconium oxide-titanium oxide composite sol according to claim 2 , wherein both zirconium oxide and titanium oxide contained in the zirconium oxide-titanium oxide composite nanoparticles have an amorphous crystal structure.

Assignees

• Daiichi Kigenso Kagaku Kogyo

Inventors

• Nishikawa Taku

Classifications

• C04B35/49 Primary

  containing also titanium oxides or titanates · CPC title

• C04B35/46

  based on titanium oxides or titanates (containing also zirconium or hafnium oxides, zirconates or hafnates C04B35/49) · CPC title

• C01P2004/04

  obtained by TEM, STEM, STM or AFM · CPC title

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title

• C01P2002/50

  Solid solutions · CPC title