ITO particles, dispersion, production method of ITO particles, production method of dispersion, and production method of ITO film

Patent metadata

Field	Value
Publication number	US-11952508-B2
Application number	US-202016928833-A
Country	US
Kind code	B2
Filing date	Jul 14, 2020
Priority date	Jan 15, 2018
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

Provided are ITO particles having a non-rectangular parallelepiped shape and an aligned crystal orientation inside particles.

First claim

What is claimed is:

1. A production method of ITO particles, comprising:
obtaining ITO particles by causing a reaction at a temperature from 180° C. to 240° C. for 12 hours to 120 hours in a solution containing In salt from 0.09 M to 0.9 M, Sn salt from 0.01 M to 0.2 M, a basic compound, and a solvent containing at least one kind of methanol, ethanol, and isopropanol.

2. The production method of ITO particles according to claim 1 , wherein, in the solution, concentration of the In salt is from 4.5 times to 9 times of concentration of the Sn salt in terms of mole.

3. A production method of ITO particles according to claim 1 , wherein
a molar ratio of a content amount of Sn to a content amount of In (Sn/In) of the ITO particles falls with a range from 3.5 to 24.

4. A production method of dispersion, comprising:
obtaining ITO particles by causing a reaction at a temperature from 180° C. to 240° C. for 12 hours to 120 hours in a solution containing In salt from 0.09 M to 0.9 M, Sn salt from 0.01 M to 0.2 M, a basic compound, and a first solvent containing at least one kind of methanol, ethanol, and isopropanol;
washing the ITO particles; and
dispersing the washed ITO particles, in a second solvent.

5. The production method of dispersion according to claim 4 , wherein, in the solution, concentration of the In salt is from 4.5 times to 9 times of concentration of the Sn salt.

6. A production method of dispersion according to claim 4 , wherein
a molar ratio of a content amount of Sn to a content amount of In (Sn/In) of the ITO particles falls with a range from 3.5 to 24.

7. A production method of dispersion according to claim 4 , wherein the second solvent is substantially prevented from comprising a surfactant.

8. A production method of dispersion according to claim 4 , wherein the second solvent is water.

Assignees

• Univ Tohoku
• Nikon Corp

Inventors

• Muramatsu Atsushi
• Kanie Kiyoshi
• Suzuki Ryoko

Classifications

• C09D5/24 Primary

  Electrically-conducting paints {(conductive materials H01B1/00)} · CPC title

• C01G19/006

  Compounds containing tin, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C09D1/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title

• H01B1/22

  the conductive material comprising metals or alloys · CPC title

• C01P2004/04

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