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A method for preparing high-performance ito granulated powder

A granulated powder, high-performance technology, applied in the field of preparing high-performance ITO granulated powder, can solve the problems of inability to meet the requirements of high-performance ITO targets, uneven structure of the green body, unfavorable densification of the target, etc., and achieve a microstructure. And the effect of uniform composition, small deformation and wide range of process parameters

Active Publication Date: 2019-04-02
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The green body is made first and then crushed. The obtained powders generally have different shapes, and their mold filling properties are not good. Arch bridges are easily formed during the molding process, resulting in uneven structure of the green body, which is not conducive to the densification of the final target.
The obtained target density is only 98.5%~98.9%, which cannot meet the requirements of high-performance ITO targets

Method used

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  • A method for preparing high-performance ito granulated powder
  • A method for preparing high-performance ito granulated powder

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preparation example Construction

[0031] The method for preparing high-performance ITO granulated powder involved in the present invention is: Weigh indium oxide and tin oxide nano-powders with a mass ratio of 9:1 and a purity greater than 99.99%, add deionized water and a dispersant, and make a certain solid content After the slurry is ball-milled by a sand mill, it reaches a certain fineness. Add binder and defoamer, spray dry to obtain powder. A certain amount of dispersant and water are added to the powder to form a slurry with a certain solid content. After high-speed dispersion, the final granulated powder is obtained by spray drying.

[0032] A method for preparing high-performance ITO granulated powder, the specific steps are as follows: (1), according to In 2 o 3 : SnO 2 =9:1 mass ratio, weigh indium oxide and tin oxide nanopowder, the particle size of indium oxide D50=10~500nm, preferably D50=70~200nm; the particle size of tin oxide nanopowder D50=10~500nm, Preferably D50=70~200nm;

[0033] (2) ...

Embodiment 1

[0043] Weigh 9kg of nano-indium oxide powder and 1kg of nano-tin oxide powder, the particle size of nano-indium oxide powder is D50=10nm, the particle size of nano-tin oxide powder is D50=20nm, add 10kg of deionized water and 0.08kg of ammonium polyacrylate to prepare into a slurry; after that, transfer the slurry to a sand mill for ball milling for 2 hours, and the corresponding D90 is 0.3 microns; then add 0.25kg of polyvinyl alcohol to the slurry, and the polyvinyl alcohol is first dissolved in deionized water to form Add 10% of the solution; then ball mill for 0.5h to produce slurry, add ethanol to the slurry after ball milling for defoaming to obtain a mixture; add the mixture to a spray drying tower for spray drying, wherein: The temperature is 200°C, the outlet air temperature is 100°C, the atomizer frequency is adjusted to 30Hz, and the powder is obtained by granulation.

[0044] Afterwards, get the powder and the cyclone powder of the spray drying tower during the pri...

Embodiment 2

[0047] Weigh 9kg of nano-indium oxide powder and 1kg of nano-tin oxide powder, the particle size of nano-indium oxide powder is D50=300nm, the particle size of nano-tin oxide powder is D50=200nm, add 5kg of deionized water and 0.15kg of dispersant to make Slurry, wherein the dispersant is composed of polyacrylic acid and ammonia water with a mass ratio of 1:1; after that, the slurry is transferred to a sand mill for ball milling for 0.5h, and the corresponding D90 is 0.1 microns; and then added to the slurry 0.2kg of polyethylene glycol, polyethylene glycol dissolved in water to make a 10% solution and then added; then ball milled for 1.0h after the slurry, adding a few drops of n-butanol to the slurry after ball milling for defoaming, the preparation Obtain a mixture; put the mixture into a spray drying tower for spray drying, wherein: the inlet air temperature is 250°C, the outlet air temperature is 130°C, the frequency of the atomizer is adjusted to 50Hz, and the powder is o...

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Abstract

The invention provides a high-performance ITO granulation powder preparation method, which comprises: weighing indium oxide nanometer powder with a purity of more than 99.99% and tin oxide nanometer powder with a purity of more than 99.99% according to a mass ratio of 9:1, adding deionized water and a dispersing agent to prepare a slurry with a certain solid content, and carrying out ball milling with a sand mill to achieve a certain fineness; adding a binder and an antifoaming agent, and carrying out spray drying to obtain powder; adding cyclone powder, a certain amount of a dispersing agent and water to the powder to prepare a slurry with a certain solid content; and carrying out high speed dispersing, and carrying out spray drying to obtain the final granulation powder. According to the present invention, the prepare granulation powder has the solid sphere shape and the large bulk density, and the prepared indium tin oxide has the single-phase micro-particle dispersed state, has the characteristics superior to the agglomerated powder, has good fluidity and good gradation, and is beneficial for meeting the molding requirement of the high-end ITO target.

Description

technical field [0001] The invention relates to the technical field of indium tin oxide targets, in particular to indium tin oxide granulated powders for preparing targets, in particular to a method for preparing high-performance ITO granulated powders. Background technique [0002] ITO (Tin-doped Indium Oxide), that is, indium tin oxide, is an n-type semiconductor material. Using ITO targets, ITO thin films prepared by vacuum coating and other methods have become indispensable for flat panel displays such as TFT-LCD and PDP. Materials, also promote the development of ITO targets into an eye-catching strategic high-tech industry. The quality of the target directly determines the performance of the film, but the high-end ITO targets used by domestic coating manufacturers have always relied on imports. [0003] The preparation process of ITO targets, especially the molding methods, currently mainly fall into two categories: dry molding and wet molding. Among them, wet moldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/01C04B35/626
CPCC04B35/01C04B35/62695C04B2235/3293
Inventor 许亚利师琳璞杨硕方宏
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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