Method for preparing ultra-fine ITO powder from metal indium and metal tin

A technology of metal tin and metal indium is applied in the field of thermal ball milling and oxidation to prepare ultrafine ITO powder, which can solve the problems of high process control requirements, large investment in spray equipment, and difficulty in oxidation, and achieves simplified process, reduced equipment requirements, and reduced production costs. Effect

Active Publication Date: 2019-01-18
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spray oxidation method is also a direct synthesis method, and uses metal indium and tin as raw materials, and the process is further simplified, but the investment in spray equipment is large and the process control requirements are high.
[0004] Considering the simplification of the process, the direct oxidation of metal indium and tin is the most direct method to prepare indium oxide and tin oxide, but the problem is that the passivation of the oxide film makes it difficult to further oxidize metals, especially metal tin, once tin oxide is formed The film will block the further progress of the reaction. Only by peeling off the oxide layer in time can the oxidation reaction continue, and ball milling can achieve this effect.

Method used

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  • Method for preparing ultra-fine ITO powder from metal indium and metal tin
  • Method for preparing ultra-fine ITO powder from metal indium and metal tin
  • Method for preparing ultra-fine ITO powder from metal indium and metal tin

Examples

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Embodiment 1

[0039] In the metal indium ingot as the raw material: In>99.99%, the total amount of impurities 99.99%, the total amount of impurities <0.01%.

[0040] This embodiment provides a method for preparing ultrafine ITO powder with metal indium and metal tin, and the process flow chart is as follows figure 1 shown, the specific steps are as follows:

[0041]S1. Composition design: Take metal indium ingots and metal tin ingots and accurately weigh them according to the mass ratio of 9.45:1, weighing 1000g in total;

[0042] S2. Alloying pre-melting: the weighed metal indium ingot and metal tin ingot are pre-melted in a crucible at a temperature of 280°C, so that indium and tin form a uniform alloy melt, and stir several times;

[0043] S3. alloy melting: add the alloy melt obtained in step S2 into the hot ball mill, put in a corresponding number of zirconia balls according to the ball-to-material ratio of 5, turn on the electric heating, and make the inner cavity temperature of the...

Embodiment 2

[0048] The metallic indium ingots and metallic tin ingots used as raw materials are the same as those in Example 1.

[0049] This embodiment provides a method for preparing ultrafine ITO powder with metal indium and metal tin, and the process flow chart is as follows figure 1 shown, the specific steps are as follows:

[0050] S1. Composition design: Take metal indium ingots and metal tin ingots and accurately weigh them according to the mass ratio of 9.45:1, weighing 1000g in total;

[0051] S2. Alloying pre-melting: The weighed metal indium ingot and metal tin ingot are pre-melted in a crucible at a temperature of 300 ℃, so that indium and tin form an alloy melt with uniform composition, and stir several times;

[0052] S3. alloy melting: add the alloy melt obtained in step S2 into the hot ball mill, put in a corresponding number of corundum balls according to the ball-to-material ratio of 9, turn on the electric heating, and make the inner cavity temperature of the ball mi...

Embodiment 3

[0057] The metallic indium ingots and metallic tin ingots used as raw materials are the same as those in Example 1.

[0058] This embodiment provides a method for preparing ultrafine ITO powder with metal indium and metal tin, and the process flow chart is as follows figure 1 shown, the specific steps are as follows:

[0059] S1. Composition design: Take metal indium ingots and metal tin ingots and accurately weigh them according to the mass ratio of 9.45:1, weighing 1000g in total;

[0060] S2. Alloying pre-melting: The weighed metal indium ingots and metal tin ingots are pre-melted in a crucible at a temperature of 250 ° C, so that indium and tin form a uniform alloy melt, and stir several times;

[0061] S3. Alloy melting: add the alloy melt obtained in step S2 into the hot ball mill, put in a corresponding number of zirconia balls according to the ball-to-material ratio of 3, turn on the electric heating, and make the inner cavity temperature of the ball mill reach 280 °...

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Abstract

The invention discloses a method for preparing ultra-fine ITO powder from metal indium and metal tin. The method comprises the following steps: taking a metal indium ingot and a tin ingot as raw materials, designing composition, alloying premelting and performing gas oxidation at the temperature of 100 to 300 DEG C in a hot ball mill to generate indium oxide and tin oxide, peeling the generated indium oxide and tin oxide from a surface of an alloy melt drip by utilizing the ball-milling effect by the ball mill, completing fine milling to finally obtain ITO powder, grading by air flow to produce ITO composite power product with uniform particle size. Compared with the prior art, the method provided by the invention has the advantages of short reaction process, fine product particle size andless reagent consumption and the like, the problem that the metal indium and the metal tin generates oxidation films during oxidation process and is difficult to further oxidize is solved.

Description

technical field [0001] The invention belongs to the field of material metallurgy, and more particularly relates to a method for preparing ultrafine ITO powder by thermal ball milling and oxidation. Background technique [0002] Indium tin oxide (ITO) has the advantages of high light transmittance, low resistivity, high film hardness, good chemical stability and etching performance, and is widely used in liquid crystal displays, solar cells, thin-film light-emitting devices, sensors and other cutting-edge manufacturing fields. The current preparation method is that indium oxide and tin oxide are separately powdered, and then mixed and then formed and sintered to form an ITO target, which has a long process and high powder production cost. And because metal tin is oxidized to form a stable tin dioxide film, which is insoluble in conventional acids and alkalis, which hinders the further oxidation reaction, so tin oxide powder is mostly prepared by wet chemical method. The comm...

Claims

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Application Information

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IPC IPC(8): C01G19/00
CPCC01G19/006C01P2002/72C01P2004/61C01P2004/62
Inventor叶龙刚欧阳臻胡宇杰夏志美陈艺锋肖利
OwnerHUNAN UNIV OF TECH