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Process for preparing nano ITO (Indium Titanium Oxide) powder by using reducing atmosphere

A technology of powder and atmosphere, which is applied in the field of preparing ITO powder, can solve the problems of affecting the quality of film formation and high resistance of ITO powder, and achieve the effect of good sintering performance, uniform particle size and low resistance

Inactive Publication Date: 2014-05-07
LIUZHOU BAIRENTE ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ITO powder produced by this method has a large resistance, which affects the film quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the mass ratio of indium and tin in terms of indium oxide and tin oxide of 9.45:1, indium tin alloy powder is made, added to nitric acid solution, and then sodium hydroxide is added, heated to 80°C, the stirring reaction time is 15h, and the solution is controlled. The pH value is 7, and the precipitation solution is separated by centrifugation to obtain indium tin hydroxide, which is washed with water and dried in vacuum at 50°C; the dried indium tin hydroxide is placed in a closed container, filled with carbon monoxide, and heated to 400 ℃, stop heating after 1 hour of heat preservation, sampling analysis, the average particle size of the particles is about 32nm, and the resistance is 3.5Ω.

Embodiment 2

[0024] According to the mass ratio of indium and tin in terms of indium oxide and tin oxide of 9.45:1, indium-tin alloy powder is made, added to nitric acid solution, and then sodium hydroxide is added, heated to 90 ° C, the stirring reaction time is 20h, and the solution is controlled. The pH value is 8, and the precipitation solution is separated by centrifugation to obtain indium tin hydroxide, which is washed with water and dried in vacuum at 50°C; the dried indium tin hydroxide is placed in a closed container, filled with hydrogen, and heated to 500 ℃, stop heating after 2 hours of heat preservation, sampling and analysis, the average particle size of the particles is about 18nm, and the resistance is 0.8Ω.

Embodiment 3

[0026] According to the mass ratio of indium and tin in terms of indium oxide and tin oxide of 9.45:1, indium tin alloy powder is made, added to nitric acid solution, and then sodium hydroxide is added, heated to 110 ° C, the stirring reaction time is 20h, and the solution is controlled. The pH value is 8, and the precipitation solution is separated by centrifugation to obtain indium tin hydroxide, which is washed with water and dried in vacuum at 50°C; the dried indium tin hydroxide is placed in a closed container, filled with hydrogen, and heated to 600 ℃, stop heating after 2 hours of heat preservation, sampling and analysis, the average particle size of the particles is about 22nm, and the resistance is 0.4Ω.

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Abstract

The invention relates to preparation of ITO (Indium Titanium Oxide) powder, and particularly relates to a process for preparing nano ITO powder by using a reducing atmosphere. The process comprises the following steps: adding indium-tin alloy powder in a nitric acid solution, adding sodium hydroxide, heating and stirring, reacting to generate an indium-tin hydroxide precipitation solution; centrifugally separating the hydroxide precipitation solution to obtain indium-tin hydroxide; washing the indium-tin hydroxide by using water, and vacuum-drying; thermally treating the dried indium-tin hydroxide in a reducing atmosphere to obtain the nano ITO powder. According to the process, by using the indium-tin alloy as a raw material, the prepared ITO powder is uniform in particle size; the nano ITO powder is prepared by using the reducing atmosphere, so that the process is smaller in resistance, and is energy-saving and safe.

Description

technical field [0001] The present invention relates to the preparation of ITO powder, specifically the process for preparing ITO powder. Background technique [0002] The main component of ITO (tin indium oxide) is a composite oxide in which tin oxide is dissolved in indium oxide. ITO has good photoelectric performance, and the film containing ITO has high conductivity and visible light transmittance, and is widely used in various fields such as solar cells, liquid crystal display devices, and touch panels. Generally, the ITO powder adopts the following preparation method: use metal indium and metal tin to obtain indium oxide powder and tin oxide powder respectively, and then mix and disperse the indium oxide powder and tin oxide powder. Since the dissolution rate, dissolution temperature, neutralization pH value, neutralization temperature and stirring speed of metal indium and metal tin as basic raw materials are difficult to completely achieve the same control condition...

Claims

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Application Information

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IPC IPC(8): C01G19/02C01G15/00B82Y30/00
Inventor 陈进中莫经耀吴伯增林东东甘振英
Owner LIUZHOU BAIRENTE ADVANCED MATERIALS
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