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Preparation method for indium tin oxide (ITO) powder and preparation method for ITO sintering body

A powder and calcination technology, which is applied in the preparation of ITO powder and the field of ITO sintered body, can solve the problems of large investment scale, high heat source cost, and inability to guarantee the uniformity of particle size of ITO powder, and achieve uniform particle size and composition. Uniform and good sintering properties

Active Publication Date: 2012-08-08
宁夏中色新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, because this method equipment investment scale is big, heat source cost is higher,

Method used

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Example Embodiment

Correspondingly, the present invention also provides a method for preparing an ITO sintered body using the ITO powder described in the above technical solution, comprising the steps of:

1) obtain slurry after mixing described ITO powder, carboxylic acid-based dispersant, wax-based binder and carboxylic acid-based defoamer;

b) adding an alkaline aqueous solution to the mixed solution to obtain an indium tin hydroxide precipitation solution;

c) separating the precipitate and liquid in the precipitation solution, washing the precipitate, and then drying the precipitated slurry;

d) calcining the precipitate to obtain ITO powder.

According to the present invention, in the indium-tin alloy, the weight ratio of indium oxide and tin oxide in terms of tin and indium conversion is 9:1. In addition, the indium-tin alloy used in the present invention may be a flat material, and preferably, the flat material is prepared into a granular shape to obtain a granular indium-tin alloy. On...

Example Embodiment

Example 1

Dissolving 14.88kg of metal indium and 1.57kg of metal tin at 200°C, dripping onto the conveyor belt through a nozzle with a diameter of 1-2mm, to obtain 16.45kg of granular indium-tin alloy;

The granular indium tin alloy was added to 58L of nitric acid with a mass concentration of 50wt% at a constant rate of 3kg / hour through a quantitative feeder, the dissolution temperature was controlled to be 100°C, and the dissolution time was 24 hours. After the reaction, a mixed solution was obtained. The concentration of nitric acid is 0.5~1.0mol, and the pH value is 0.1~0.3;

The residue in the mixed solution was filtered with a filter cloth with a mesh size of 150 μm. Add pure water to the mixed solution after filtration, control the total amount of liquid to be 270L, the temperature to be 40°C, and the pH to be 2 to 4;

The above-mentioned mixed solution was placed in a closed container, and 28wt% of ammonia water was added to the mixed solution to carry out neutralizat...

Example Embodiment

Example 2

Dissolving 14.88kg of metal indium and 1.57kg of metal tin at 200°C, dripping onto the conveyor belt through a nozzle with a diameter of 1-2mm, to obtain 16.45kg of granular indium-tin alloy;

The granular indium tin alloy was added to 58L of nitric acid with a mass concentration of 50wt% at a constant rate of 3kg / hour through a quantitative feeder, the dissolution temperature was controlled to be 100°C, and the dissolution time was 24 hours. After the reaction, a mixed solution was obtained. The concentration of nitric acid is 0.5~1.0mol, and the pH value is 0.1~0.3;

The residue in the mixed solution was filtered with a filter cloth with a mesh size of 150 μm. Add pure water to the mixed solution after filtration, control the total amount of liquid to be 270L, the temperature to be 40°C, and the pH to be 2 to 4;

The above-mentioned mixed solution was placed in a closed container, and 28wt% of ammonia water was added to the mixed solution to carry out neutralizat...

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Abstract

The invention discloses a preparation method for indium tin oxide (ITO) powder, which uses tin alloys as raw materials. The preparation method for the ITO powder comprises dissolving the tin alloys into nitric acid to generate metastannic acid polymer (H2SnO3) n, enabling In (OH) 3 to precipitate simultaneously with the (H2SnO3) n as the center, and sintering to obtain the ITO powder. Compared with the prior art, the preparation method for the ITO powder uses the tin alloys as the raw materials, the tin alloys react with the nitric acid to simultaneously generate indium oxide and tin oxide, evenness of the particle size of the prepared ITO powder is guaranteed, and sintering performance is good. Test results show that the crystallization sub diameter of the prepared ITO powder is D90/D50 and not larger than 3.5. In addition, the invention further provides a method using the ITO powder to prepare an ITO sintering body. The sintering body is even in constituent, even in crystallization particle size and high in density.

Description

technical field The present invention relates to metal oxide technical field, more specifically, relate to a kind of preparation method of ITO powder and the method for preparing ITO sintered body. Background technique The main component of ITO (indium tin 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. The methods for preparing ITO thin films include sputtering method, vacuum evaporation method, sol-gel method, cluster deposition method and PLD method. The sputtering method is a common method for preparing ITO films. When vacuum evaporation or magnetron sputtering is used to prepare ITO films, ITO powder must be prepared first, and then the powder is pressed and sintered into an ITO target. The particle size of the IT...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/626C04B35/622
Inventor 钟景明刘孝宁张红梅马建保杨小林周帆方熙成刘伟胡强楠李正飞王应旺征卫星马春红
Owner 宁夏中色新材料有限公司
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