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Method for preparing nanometer ITO (indium tin oxide) powder by virtue of coprecipitation method

A co-precipitation method and nanotechnology, applied in the direction of nanotechnology, tin oxide, etc., can solve the problems of chemical pollution, large amount of organic solvent, ITO powder uniformity and poor sintering performance, and achieve the goal of reducing chemical pollution and uniform particle size Effect

Active Publication Date: 2015-07-22
GUANGXI HUAXI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this common method not only easily leads to poor uniformity and sintering performance of the prepared ITO powder, but also consumes a large amount of organic solvent, which is highly volatile and easily causes chemical pollution.

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 is 9.45:1, first dissolve metal indium in an appropriate amount of hydrochloric acid solution to prepare 20 mL of indium chloride, add 20 mL of tin tetrachloride to the solution, and stir for 10 minutes , add 15mL ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate and 0.3mol / L sodium hydroxide 10mL, stir and heat to 50°C, keep the pH value of the solution at 6, and react for 40 minutes Allow it to cool naturally, and let it settle for 8 hours; then filter the precipitate and perform centrifugation, then place the precipitate in distilled water and stir, centrifuge to separate the distilled water and the precipitate, wash the precipitate with distilled water 3 times, and then remove the precipitate After vacuum drying at 40°C, place it in a calciner and calcinate at 1100°C to form ITO powder. The above-mentioned ITO powder sample was analyzed by X-ray diffractometer, and ...

Embodiment 2

[0024] According to the mass ratio of indium and tin in terms of indium oxide and tin oxide is 9.45:1, first dissolve metal indium in an appropriate amount of hydrochloric acid solution to prepare 20 mL of indium chloride, add 20 mL of tin tetrachloride to the solution, and stir for 10 minutes , add 20mL of ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate and 10mL of 0.5mol / L sodium hydroxide, stir and heat to 70°C, keep the pH value of the solution at 7, and react for 60 minutes Let it cool down naturally, let it stand and sink for 8 hours; then filter the precipitate and carry out centrifugation, then place the precipitate in distilled water and stir, centrifuge to separate the distilled water and the precipitate, wash the precipitate with distilled water 4 times, and then remove the precipitate After vacuum drying at 40°C, place it in a calciner and calcinate at a temperature of 1200°C to form ITO powder particles. The above-mentioned ITO powder sample was...

Embodiment 3

[0026] According to the mass ratio of indium and tin in terms of indium oxide and tin oxide is 9.45:1, first dissolve metal indium in an appropriate amount of hydrochloric acid solution to prepare 20 mL of indium chloride, add 20 mL of tin tetrachloride to the solution, and stir for 10 minutes , add 25mL of ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate and 15mL of 0.8mol / L sodium hydroxide, stir and heat to 80°C, keep the pH value of the solution at 7, and react for 80 minutes Allow it to cool naturally, and let it settle for 8 hours; then filter the precipitate and perform centrifugation, then place the precipitate in distilled water and stir, centrifuge to separate the distilled water and the precipitate, wash the precipitate with distilled water 5 times, and then remove the precipitate After vacuum drying at 40°C, place it in a calciner, and calcinate at a temperature of 1300°C to form ITO powder particles. The above-mentioned ITO powder sample was anal...

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Abstract

The invention relates to preparation of ITO powder and particularly relates to a method for preparing nanometer ITO (indium tin oxide) powder by virtue of a coprecipitation method. The method comprises the following steps: dissolving metal indium into a hydrochloric acid solution, adding stannic chloride into the hydrochloric acid solution, stirring the mixed solution, adding ion liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate and a sodium hydroxide solution, heating and uniformly stirring, and reacting to generate an indium tin oxide hydroxide precipitation solution; carrying out centrifugal separation on the precipitation solution, so as to obtain the indium tin oxide; carrying out vacuum drying after washing the indium tin oxide by water; burning the dried indium tin oxide, so as to obtain the ITO powder. Compared with the coprecipitation method in the prior art, the method has the advantages that the metal indium and the stannic chloride are taken as raw materials to synthesize the ITO powder in an ion solution, so that additional solvents such as protective agents and the like do not need to be added, the chemical pollution is reduced, and furthermore, the grain sizes of the prepared ITO powder are uniform and can reach a nanoscale.

Description

technical field [0001] The invention relates to the preparation of ITO powder, in particular to a method for preparing ITO powder by co-precipitation method. 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 sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/02B82Y40/00
Inventor 林荔琍唐臻易鉴荣李因吴坚
Owner GUANGXI HUAXI GRP CO LTD