Title:
METHOD FOR PRODUCING VANADIUM DIOXIDE-CONTAINING PARTICLES
Document Type and Number:
WIPO Patent Application WO/2020/044981
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a method for producing vanadium dioxide-containing particles, by which it is possible to produce vanadium dioxide-containing particles having a small average particle diameter and obtain an optical film having low haze and excellent thermochromic properties by using the vanadium dioxide-containing particles. This method for producing vanadium dioxide-containing particles is a method in which vanadium dioxide-containing particles are produced by means of a hydrothermal synthesis method using a circulating reactor and using a reaction liquid obtained by mixing supercritical water or subcritical water with a raw material slurry containing a vanadium-containing compound and a compound that reacts with the vanadium-containing compound. The production method is characterized in that vanadium dioxide-containing particles having a pH of 8.0-11.0, an electrical conductivity within the range 10-1000 mS/m, an average primary particle diameter of 1-30 nm and an average crystallite diameter within the range 1-15 nm are produced by subjecting the raw material slurry to a desalting treatment prior to the hydrothermal synthesis method.
Inventors:
YAMAMOTO SHOICHI (JP)
Application Number:
PCT/JP2019/030815
Publication Date:
March 05, 2020
Filing Date:
August 06, 2019
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
C01G31/02; B82Y40/00; C09K9/00
Domestic Patent References:
| WO2016158894A1 | 2016-10-06 | |||
| WO2017208892A1 | 2017-12-07 |
Foreign References:
| JP2016191015A | 2016-11-10 | |||
| JP2012140252A | 2012-07-26 |
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
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