Preparation method of indium tin oxide composite powder

A technology of composite powder and indium tin oxide, which is applied in tin oxide, chemical instruments and methods, gallium/indium/thallium compounds, etc., can solve the problem of unsatisfactory dispersion of indium tin oxide composite powder, low sintering activity, and hard agglomeration More problems, to achieve the effect of less hard agglomeration, good fluidity, and reduce agglomeration

Active Publication Date: 2017-06-23
ANHUI TUOJITAI NOVEL CERAMIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a preparation method of indium tin oxide composite powder, which solves the problems of unsatisfactory dispersibility, many hard agglomerates and low sintering activity of the indium tin oxide composite powder prepared by the existing preparation method

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  • Preparation method of indium tin oxide composite powder

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Embodiment 1

[0023] This embodiment provides a preparation method of indium tin oxide composite powder, comprising the following steps:

[0024] (1) Preparation of mixed salt solution and precipitation system: according to the weight ratio of In 2 o 3 : SnO 2 =9:1, measure the InCl whose mass concentration is 220g / L 3 Solution and SnCl with a mass concentration of 230g / L 4 The solution is placed in a reaction kettle, and then an excess of 20% urea is added, stirred and mixed evenly;

[0025] (2) Adding a dispersant: adding polyvinylpyrrolidone, β-alanine and polyethylene glycol at a weight ratio of 2:1:3; the amount of the dispersant is InCl 3 and SnCl 4 3.5% of the total amount;

[0026] (3) Co-precipitation reaction: Gradually raise the temperature to 70°C, and keep the constant temperature until In 3+ Until complete precipitation; Ultrasonic treatment for 1 hour, the frequency range of the ultrasonic wave is 50MHz, continue to stir and age for 12 hours to obtain metal precipitate...

Embodiment 2

[0032] This embodiment provides a preparation method of indium tin oxide composite powder, comprising the following steps:

[0033] (1) Preparation of mixed salt solution and precipitation system: according to the weight ratio of In 2 o 3 : SnO 2 =9:1, measure the InCl whose mass concentration is 200g / L 3 Solution and SnCl with a mass concentration of 250g / L 4 The solution is placed in a reaction kettle, and then an excess of 25% urea is added, stirred and mixed evenly;

[0034] (2) Adding a dispersant: adding polyvinylpyrrolidone, β-alanine and polyethylene glycol at a weight ratio of 2:1:3; the amount of the dispersant is InCl 3 and SnCl 4 4% of the total amount;

[0035] (3) Co-precipitation reaction: Gradually raise the temperature to 60°C, and keep the constant temperature until In 3+ Until complete precipitation, ultrasonic treatment for 1 hour, the frequency range of ultrasonic wave is 60MHz; continue to stir and age for 10 hours to obtain metal precipitates;

...

Embodiment 3

[0041] This embodiment provides a preparation method of indium tin oxide composite powder, comprising the following steps:

[0042] (1) Preparation of mixed salt solution and precipitation system: according to the weight ratio of In 2 o 3 : SnO 2 =9:1, measure the InCl whose mass concentration is 250g / L 3 Solution and SnCl with a mass concentration of 200g / L 4 The solution is placed in a reaction kettle, and then an excess of 28% urea is added, stirred and mixed evenly;

[0043] (2) Adding dispersant: adding polyvinylpyrrolidone, β-alanine and polyethylene glycol with a weight ratio of 2:1:3, the addition of the dispersant is InCl3 and SnCl 4 2% of the total amount;

[0044](3) Co-precipitation reaction: Gradually raise the temperature to 90°C, and keep the constant temperature until In 3+ Until complete precipitation, ultrasonic treatment for 1 hour, the frequency range of ultrasonic wave is 60MHz; continue to stir and age for 20 hours to obtain metal hydroxide;

[004...

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Abstract

The invention discloses a preparation method of indium tin oxide composite powder, belonging to the technical field of preparation of indium tin oxide composite powder. The method comprises the following steps: preparation of mixed salt liquid: putting an InCl3 liquid and an SnCl4 liquid into a reaction kettle according to the In2O3:SnO2 weight ratio of 9:1, and uniformly mixing; addition of dispersing agents: adding polyvinylpyrrolidone, beta-alanine and ethanediol according to the weight ratio of 2:1:3, and adding more than 20% excessive of urea; coprecipitation reaction: gradually heating to 60-90 DEG C, keeping the temperature while continuously stirring until the In<3+> in the reaction solution is completely precipitated, carrying out ultrasonic treatment for 1 hour, continuing stirring, and aging to obtain an indium tin precipitate; and washing, drying, grinding, screening and carrying out high-temperature calcination to obtain the high-sintering-activity nano indium tin oxide composite powder. The indium tin oxide composite powder prepared by the method has the advantages of less hard aggregation and favorable flowability, and is easy for pressure molding.

Description

technical field [0001] The invention relates to the technical field of preparation of indium tin oxide composite powder, in particular to a method for preparing indium tin oxide composite powder by a co-precipitation method. Background technique [0002] ITO powder is the raw material for preparing ITO sputtering coating targets. To obtain high-quality and high-density ITO sputtering targets, it is necessary to have a uniform composition of ultra-pure, ultra-fine and highly sinterable ITO powder. [0003] Generally speaking, the specific requirements for ITO powder are: the particle size is less than 100nm, and the specific surface area is greater than 15m 2 / g, and the particle morphology is spherical, the particle size distribution range is narrow, and there are few hard agglomerates. At present, the preparation methods of ITO powder reported in the literatures of various countries mainly include: the homogeneous co-precipitation method, the aqueous solution co-precipitat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02C01G15/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G15/00C01G19/02C01P2004/03C01P2004/04C01P2004/64C01P2006/11
Inventor 张天舒宋晓超张天宇何东
Owner ANHUI TUOJITAI NOVEL CERAMIC TECH
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