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Preparation method of superfine indium oxide powder

A technology of indium oxide and powder, which is applied in the field of preparation of ultrafine indium oxide powder, which can solve the problems of limited process promotion, large investment in equipment, and inability to uniformly control the particle size of the powder.

Inactive Publication Date: 2020-12-22
广东欧莱高新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used production processes include precipitation method, combustion method, gasification oxidation method, etc. The production of indium oxide powder by precipitation has simple equipment and large output, which is suitable for large-scale production. The combustion method is simple and direct, but the particle size of the powder cannot be uniformly controlled. , the gasification method is currently a production method widely used in the world with fine particle size control, but the equipment investment is huge, which limits the promotion of this process

Method used

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  • Preparation method of superfine indium oxide powder

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A preparation method of ultrafine indium oxide powder, comprising the steps of:,

[0026] S1, add the refined indium powder with a particle size of 100 mesh into nitric acid to dissolve, and filter to obtain a clear solution with an indium concentration of 10g / L;

[0027] S2. Transfer the clarified solution obtained in step S1 into a pressure reaction vessel, heat to 60° C., start stirring, evacuate the reactor to a vacuum of 0.01 atm, and simultaneously feed ammonia and helium into the reaction vessel, The flow ratio of ammonia and helium is 1:5. When the pressure in the reaction vessel is higher than 0.8atm, stop feeding helium, and only feed ammonia until the pH value of the reaction solution in the reaction vessel is 7.0, stop React and pass filtered air to balance the pressure inside and outside the reaction vessel to obtain a mixed solution;

[0028] S3. After standing the mixed solution for 24 hours, filter to obtain the precipitate, and wash the precipitate wit...

Embodiment 2

[0031] A preparation method of ultrafine indium oxide powder, comprising the steps of:,

[0032] S1, add the refined indium powder with a particle size of 200 mesh into sulfuric acid to dissolve, and filter to obtain a clear solution with an indium concentration of 30g / L;

[0033] S2, transfer the clarified solution obtained in step S1 into a pressure reaction vessel, heat to 80° C., start stirring, evacuate the reactor to a vacuum of 0.1 atm, and simultaneously feed ammonia and helium into the reaction vessel, The flow ratio of ammonia and helium is 1:5. When the pressure in the reaction vessel is higher than 0.8atm, stop feeding helium, and only feed ammonia until the pH value of the reaction solution in the reaction vessel is 9.0, stop React and pass filtered air to balance the pressure inside and outside the reaction vessel to obtain a mixed solution;

[0034] S3. After standing the mixed solution for 24 hours, filter to obtain the precipitate, and wash the precipitate wi...

Embodiment 3

[0036] A preparation method of ultrafine indium oxide powder, comprising the steps of:,

[0037] S1, adding hydrochloric acid to dissolve refined indium powder with a particle size of 200 mesh, and filtering to obtain a clear solution with an indium concentration of 20g / L;

[0038] S2, transfer the clarified solution obtained in step S1 into a pressure reaction vessel, heat to 70° C., start stirring, evacuate the reactor to a vacuum of 0.05 atm, and simultaneously feed ammonia and helium into the reaction vessel, The flow ratio of ammonia and helium is 1:5. When the pressure in the reaction vessel is higher than 0.8atm, stop feeding helium, and only feed ammonia until the pH value of the reaction solution in the reaction vessel is 8.0, stop React and pass filtered air to balance the pressure inside and outside the reaction vessel to obtain a mixed solution;

[0039] S3. After standing the mixed solution for 24 hours, filter to obtain the precipitate, and wash the precipitate ...

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Abstract

The invention discloses a preparation method of superfine indium oxide powder, which is characterized by comprising the following steps: S1, adding an acid into refined indium powder for dissolution,and conducting filtering to obtain a clear solution; s2, heating the clarified solution obtained in the step S1 to 60-80 DEG C, starting stirring, vacuumizing a reactor, introducing ammonia gas and helium gas at the same time, stopping introducing helium gas and only introducing ammonia gas when the pressure in the reactor is higher than 0.8 atm until the pH value of the reaction solution is 7.0-9.0, stopping the reaction, and introducing air to balance the pressure inside and outside the reactor to obtain a mixed solution; and S3, standing the mixed solution, conducting filtering to obtain aprecipitate, washing the precipitate with deionized water, concentrating the washed precipitate, adding anhydrous alcohol, conducting drying, carrying out jet milling, and conducting calcining to obtain the ultrafine indium oxide powder. On the basis of a precipitation method, ammonia gas is used as precipitation gas; and the particle size of precipitated indium hydroxide is controlled by controlling the flow and the concentration of ammonia gas, so that indium oxide ultrafine nano-particles are obtained.

Description

technical field [0001] The invention belongs to the technical field of indium oxide processing and preparation, and in particular relates to a preparation method of ultrafine indium oxide powder. Background technique [0002] Indium oxide is an inorganic chemical product, which is used as a spectral pure reagent, a material for electronic components, a protective coating for metal mirrors, a photoelectric display semiconductor film, and the manufacture of indium salts and glass. The currently used production processes include precipitation method, combustion method, gasification oxidation method, etc. The production of indium oxide powder by precipitation has simple equipment and large output, which is suitable for large-scale production. The combustion method is simple and direct, but the particle size of the powder cannot be uniformly controlled. , the gasification method is currently a production method widely used in the world with fine particle size control, but the equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00B82Y30/00B82Y40/00
CPCC01G15/00B82Y30/00B82Y40/00C01P2004/03C01P2004/64C01P2006/12
Inventor 文宏福叶俊峰闻玉凤
Owner 广东欧莱高新材料股份有限公司