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Method for preparing ITO powder with high sintering activity

A sintering activity, powder technology, applied in chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the problems of corrosion in the use environment and reducing the service life of components

Inactive Publication Date: 2007-06-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A small amount of residual chloride ions in the application process will also have a serious corrosion effect on the use environment and reduce the service life of components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0010] The method for preparing ITO powder with high sintering activity of the present invention includes the following steps:

[0011] (1) First, dissolve the tin source and indium source without chloride ions into deionized water at 0~90℃ and stirring conditions to prepare the indium ion concentration to be 0.1~3mol / L, the molar ratio of tin ion and indium ion A solution with a ratio of (3~12):100; then add organic complexing agent to the solution, the molar ratio of organic complexing agent to metal ion (the sum of tin ion and indium ion) is (0.25~5):1 ; Finally, add ammonia water to adjust the pH to 4-12;

[0012] (2) Put the mixture containing indium, tin and organic complexing agent in a reactor with a pH value of 4-12 prepared in step (1), and conduct a hydrothermal reaction at 130-260°C for 3-24 hours. The thermal reaction product is washed with deionized water and absolute ethanol and dried at 80-130°C for 1 to 5 hours, and the dried hydrothermal reaction product is heat-...

Embodiment 1

[0019] Accurately weigh 15g of indium isopropoxide, weigh out stannous nitrate according to the molar ratio of tin to indium of 10:100, and prepare it to 3molL -1 The mixed solution, the preparation temperature is 0 ℃. Under vigorous stirring, triethylamine was added to the above solution, the molar ratio of triethylamine to metal ions (the sum of tin ions and indium ions) was 1:1, and the pH value of the system was adjusted to 12 with ammonia water. The system was transferred to an autoclave for hydrothermal reaction, the hydrothermal temperature was 160°C, and the hydrothermal time was 7 hours. After the hydrothermal reaction, the hydrothermal product was taken out, washed several times with deionized water and absolute ethanol, and then dried at 130°C for 3 hours. The dried hydrothermal powder is heat-treated at 700°C for 2 hours to obtain the product ITO powder. The powder was measured by X-ray diffraction method, and the crystal plane at 31.0° in the powder diffraction peak w...

Embodiment 2

[0022] Accurately weigh 10g of indium citrate, weigh tin iodide according to the molar ratio of tin to indium of 3∶100, and prepare 1molL -1 The mixed solution is prepared at a temperature of 40°C. Under vigorous stirring, tartaric acid is added to the above solution, the molar ratio of tartaric acid to metal ions (the sum of tin ions and indium ions) is 0.25:1, and the pH value of the system is adjusted to 6 with ammonia water. The system was transferred to an autoclave for hydrothermal reaction, the hydrothermal temperature was 260°C, and the hydrothermal time was 3 hours. After the hydrothermal reaction, the hydrothermal product was taken out, washed several times with deionized water and absolute ethanol, and then dried at 80°C for 2 hours. The dried hydrothermal powder is heat treated at 900°C for 5 hours to obtain the product ITO powder. The powder was measured by X-ray diffraction method, and the crystal plane at 31.0° in the powder diffraction peak was calculated with Sche...

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Abstract

This invention relates to a preparation method for high sintered active InO powder doped with tin including the following steps: adding an organic complexing agent into a solution composed of Sn source, In source and deionized water, in which, the mol ratio of organic complexing agent and the metal ions is (0.25-5):1, then adding ammonia to adjust the pH value to 4-12, finally, putting it into a reactor for hydrothermal reaction for 3-24 h and the reacted materials are cleaned, dried and heat-processed to get the product, which is advantaged that the size of the produced ITO powder is 6-25 nm, the specific area reaches to 30-80m2 / g, the produced ITO powder gets fine sintered activity (reaching to 98.7% relative density at the maximum when being sintered under 1200deg.C and normal pressure).

Description

Technical field [0001] The invention relates to a method for preparing tin-doped indium oxide (ITO) powder with high sintering activity. Background technique [0002] Tin doped indium oxide (Indium Tin Oxide, referred to as ITO), when the tin content is 5-10%, the conductivity of the material can reach 10 5 Ω -1 cm -1 Above, it is only smaller than the high-conductivity metal silver, aluminum and so on. The distinguishing feature of ITO over metal conductors is that it has a strong transmittance in the visible light region (usually up to 80%). In addition, ITO also has the ability to reflect infrared rays. The above-mentioned characteristics of ITO make it widely used in many fields and become the most critical material among the transparent conductive oxide materials (TCOs, Transparent Conductive Oxides) with very important application and research value at this stage. [0003] Nicolas et al. (J. Am. Ceram. Soc., 1994, 77, 834-846) used In 2 O 3 And SnO 2 As a raw material, ITO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00C01G19/02
Inventor 张建荣穆劲刘凌云
Owner EAST CHINA UNIV OF SCI & TECH
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