Method of preparing fibre powder body of Nano alumina in high purity

A technology of nano-alumina and fiber powder, which is applied in the field of preparation of high-purity nano-alumina fiber powder by chemical gas-solid phase reaction method, can solve problems such as pollution, and achieve broad application prospects, high yield, and strong adsorption force effect

Inactive Publication Date: 2004-10-27
NANJING UNIV
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Problems solved by technology

The above method generally has certain pollution
The performance of high-purity nano-alumina fiber powder is better than that of spherical high-purity nano-alumina powder, and it has unique uses. There is no report on the preparation method of high-purity nano-alumina fiber powder.

Method used

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  • Method of preparing fibre powder body of Nano alumina in high purity

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Embodiment Construction

[0021] Dissolve the HV-1 catalyst in distilled water, add mineral acid and heat slightly, but the temperature should not exceed 40°C to promote its dissolution. The concentration of catalyst HV-1 is between 3% and 8%. When it is lower than 3%, the catalyst should be replenished in time. The catalyst is produced by Nanjing Nanda Yurun Nano Technology Engineering Center.

[0022] The pure aluminum is soaked in the catalyst solution for 1-30 minutes for activation treatment, and after the aluminum is taken out, the surface is rinsed with distilled water to wash off surface impurities. Then place the aluminum on the blowing outlet, and blow air to the metal aluminum through the air compressor. It is also possible to control the temperature of the blowing gas to 35-40°C. The higher the air blowing temperature, the shorter the time, usually 10-60 minutes. Then leave it for 1-10 hours, at this time, the surface of the aluminum reacts with the oxygen in the air to form nano-alumina ...

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Abstract

A process for preparing the high-purity powder of nano-class alumina fibres includes dissolving HV-1 catalyst in distilled water, adding inorganic acid while slight heating for dissolving, immersing metal aluminium in it for 1-30 min in order to activate it, flushing with distilled water, blowing compressed air onto its surface for several hr to generate nano-class alumina fibres, collecting the fibres, and calcining at 500 deg.C for 0.5-5 hr to evaporate catalyst.

Description

1. Technical field [0001] The invention relates to the preparation of high-purity nano-alumina fiber powder, in particular to a preparation method for producing high-purity nano-alumina fiber powder by using a chemical gas-solid phase reaction method. 2. Background technology [0002] Existing methods involving the preparation of high-purity nano-alumina mostly use the method of chemical hydrolysis reaction crystallization, and the raw materials mostly use titanium tetrachloride and the like. If it involves the preparation of high-purity nano-alumina fiber powder, a high-temperature and high-pressure process is required. The above method generally has certain pollution. The performance of high-purity nano-alumina fiber powder is better than that of spherical high-purity nano-alumina powder, and it has unique uses. There is no report on the preparation method of high-purity nano-alumina fiber powder. 3. Contents of the invention [0003] The object of the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/42
Inventor 都有为徐宝龙韩毓旺
Owner NANJING UNIV
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