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Method of preparing nano ITO (Indium Tin Oxide) powder by ionic liquid

A technology of ionic liquid and powder, which is applied in the field of preparing ITO powder by using ionic liquid, which can solve the problems of chemical pollution, large amount of organic solvent, uniformity of ITO powder and poor sintering performance, and achieve uniform particle size and less chemical pollution.

Active Publication Date: 2014-05-21
广西华锡集团股份有限公司
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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

[0024] Weigh indium sulfate and sodium hydroxide according to the reaction molar ratio, add an appropriate amount of ionic liquid 1-butyl-3-methylimidazole trifluoromethanesulfonate, the test proves that the addition of ionic liquid has little influence on the reaction, Therefore, the amount of addition can be selected according to the amount of solid matter, and stirred and heated to 50 ° C, and allowed to cool to room temperature after 10 minutes of reaction; take out the precursor, add absolute ethanol and deionized water to wash, and then centrifuge until the supernatant The liquid becomes neutral, then vacuum-dried at 50°C, and finally calcined to obtain indium oxide powder. The above-mentioned powder sample was analyzed with an X-ray diffractometer, and the average particle size of the sample was calculated according to the Scherrer formula to be 43.2 nm. At the same time, add 0.3mol / L sodium hydroxide solution to the tin tetrachloride solution, then add the ionic liquid...

Embodiment 2

[0026] Weigh indium sulfate and sodium hydroxide according to the reaction molar ratio, add an appropriate amount of ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate, stir and heat to 60°C, and let it cool to Room temperature; take out the precursor, add absolute ethanol and deionized water to wash, and then centrifuge until the supernatant becomes neutral, then vacuum-dry at 50°C, and finally calcinate to obtain indium oxide powder. The above-mentioned powder sample was analyzed with an X-ray diffractometer, and the average particle size of the sample was calculated according to the Scherrer formula to be 36.5 nm. At the same time, add 0.5mol / L sodium hydroxide solution to the tin tetrachloride solution, then add the ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate, and heat to 70°C and stir, react for 20min, Centrifuge and wash with absolute ethanol and deionized water to obtain tin oxide powder. The above-mentioned powder sample was anal...

Embodiment 3

[0028] Weigh indium sulfate and sodium hydroxide according to the reaction molar ratio, add an appropriate amount of ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate, stir and heat to 70°C, and let it cool to Room temperature; take out the precursor, add absolute ethanol and deionized water to wash, and then centrifuge until the supernatant becomes neutral, then vacuum-dry at 50°C, and finally calcinate to obtain indium oxide powder. The above-mentioned powder sample was analyzed with an X-ray diffractometer, and the average particle size of the sample was calculated according to the Scherrer formula to be 40.3 nm. At the same time, add 0.8mol / L sodium hydroxide solution to the tin tetrachloride solution, then add the ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate, and heat to 80°C and stir, react for 30min, Centrifuge and wash with absolute ethanol and deionized water to obtain tin oxide powder. The above-mentioned powder sample was anal...

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Abstract

The invention relates to preparation of ITO (Indium Tin Oxide) powder, and specifically relates to a method of preparing nano ITO (Indium Tin Oxide) powder by an ionic liquid. The method comprises the following steps: adding solid indium sulfate into the ionic liquid 1-butyl-3-methylimidazole trifluoromethanesulfonate, uniformly stirring, and then adding sodium hydroxide particles to obtain indium oxide powder; adding sodium hydroxide liquor into tin tetrachloride liquor, and then adding the ionic liquid 1-butyl-3-methylimidazole trifluoromethanesulfonate to obtain tin oxide powder; weighing the indium oxide powder and the tin oxide powder according to proportions, and mixing and grinding to obtain a mixture; and drying the mixture to obtain the ITO powder. Compared with mechanical grinding in the prior art, the method disclosed by the invention has the advantages that by taking indium sulfate and tin tetrachloride as raw materials, indium oxide and tin oxide powder are respectively prepared in the ionic liquid, and then the mixed power is grinded, so that the preparation process is less in chemical pollution; in addition, the prepared ITO powder is uniform in grain size, and the granularity can reach nanoscale.

Description

technical field [0001] The invention relates to the preparation of ITO powder, in particular to a method for preparing ITO powder by using ionic liquid. 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 c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02C01G15/00
Inventor 林荔琍唐臻易鉴荣李因吴坚
Owner 广西华锡集团股份有限公司
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