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Method for the treatment of aluminum oxide powder

A kind of technology of alumina powder and powder, which is applied in the direction of alumina/hydroxide, etc., can solve the problems such as the performance and quality gap of alumina powder in the powder treatment process

Inactive Publication Date: 2009-03-18
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardware level of my country's powder preparation industry can be compared with that of foreign countries, but the gap in the specific powder processing technology has caused the gap between the performance and quality of my country's alumina powder and foreign countries

Method used

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  • Method for the treatment of aluminum oxide powder
  • Method for the treatment of aluminum oxide powder
  • Method for the treatment of aluminum oxide powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw materials used are as follows:

[0025] High-purity alumina powder (Al 2 o 3 Purity ≥ 99.99wt%), grade LM2-N214, provided by Dalian Luming Nano Material Co., Ltd.;

[0026] Citric acid (chemically pure), provided by Shanghai Chemical Reagent Company;

[0027] Magnesium nitrate (analytical pure), provided by Shanghai Chemical Reagent Company;

[0028] Deionized water, Fudan University water plant.

[0029] The ratio of raw materials used is as follows:

[0030] Deionized water and alumina powder are added in a weight ratio of 1:1, and the amount of citric acid added is 0.5 wt% based on the alumina powder. Raw material powder processing method: take deionized water, add citric acid, stir evenly with a glass rod, add pretreated alumina powder, and use manual mechanical stirring to mix the mixed slurry evenly, and let it stand for 6 hours.

[0031] Performance comparison experiment plan of raw material powder before and after treatment: two kinds of powders be...

Embodiment 2

[0036] The raw materials used are as follows:

[0037] High-purity alumina powder (Al 2 o 3 Purity ≥ 99.99wt%), grade LM2-N214, provided by Dalian Luming Nano Material Co., Ltd.;

[0038] Nitric acid (analytical grade), provided by Shanghai Chemical Reagent Company;

[0039] Deionized water, Fudan University water plant.

[0040] The ratio of raw materials used is as follows:

[0041] Deionized water and alumina powder are added in a weight ratio of 1:1, and the amount of nitric acid added is limited to the pH of the pretreatment solution = 2.

[0042] Raw material powder processing method: take deionized water, add nitric acid, stir evenly with a glass rod, add pretreated alumina powder, and stir the mixed slurry evenly by manual mechanical stirring, and let it stand for 9 hours.

[0043] Experimental plan for performance comparison of raw material powder before and after treatment: use the two kinds of powder before and after treatment to conduct comparative experiments...

Embodiment 3

[0047] The raw materials used are as follows:

[0048] High-purity alumina powder (Al 2 o 3 Purity ≥ 99.99wt%), grade LM2-N214 provided by Dalian Luming Nano Material Co., Ltd.;

[0049] Polyacrylic acid aqueous solution, provided by Jiangsu Wujin Water Treatment Plant;

[0050] Deionized water, Fudan University water plant.

[0051] The ratio of raw materials used is as follows:

[0052] Deionized water and alumina powder are added in a weight ratio of 1:1, and the amount of polyacrylic acid added is 1 wt% based on the alumina powder.

[0053] Raw material powder processing method: take deionized water, add polyacrylic acid, stir evenly with a glass rod, add pretreated alumina powder, and use manual mechanical stirring to mix the mixed slurry evenly, and let it stand for 6 hours.

[0054] Performance comparison experiment plan of raw material powder before and after treatment: two kinds of powders before and after treatment were used to conduct comparative experiments, r...

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Abstract

The invention relates to a method for treating alumina oxide powder. It comprises following steps: preparing powder pretreating liquid, adding alumina oxide powder, stirring mechanically to mix slurry, distributing with supersonic wave at the same time, the pretreating time is more than 30 minutes, drying slurry after the powder is thoroughly treated and getting dried powder. The invention is characterized in that it adds alumina oxide into acid treating liquid and achieves higher activity for raw material powder.

Description

technical field [0001] The invention belongs to the field of preparation and treatment of powder materials, and specifically relates to a treatment method for alumina powder, through which the activity energy of the raw material powder is greatly improved; at the same time, this powder treatment method can also be used Applicable to other micro-nano powders. Background technique [0002] my country's alumina output ranks first in the world, but there is still a big gap between the world's advanced level in the field of high-quality and high-performance alumina powder preparation. This gap is mainly reflected in the powder processing technology. The hardware level of my country's powder preparation industry can be compared with that of foreign countries, but the gap in the specific powder processing technology has caused the gap between the performance and quality of my country's alumina powder and foreign countries. [0003] In addition, since powder raw materials are the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02
Inventor 郭超谢建林
Owner SHANGHAI RES INST OF MATERIALS CO LTD