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Method for preparing zirconium dioxide nano powder

A nano-powder and zirconia technology, applied in zirconia and other directions, can solve the problems of high-temperature calcination, complex technical process, large amount of waste liquid, etc., and achieve the effect of easy peeling, simple process and short production cycle

Inactive Publication Date: 2009-10-21
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of zirconia nano-powder, which is an anodic oxidation method, which overcomes the complexity of the existing zirconia powder preparation method, the large amount of waste liquid, the Disadvantages of high temperature calcination

Method used

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  • Method for preparing zirconium dioxide nano powder

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Effect test

Embodiment 1

[0018] Add hydrogen fluoride aqueous solution with a concentration of 0.5% by weight in the reaction vessel, the zirconium sheet is used as the anode, and the platinum sheet is used as the cathode. The flakes are washed with a small amount of water, dried in a natural state, and then the uniform and loose oxides on the surface of the zirconium flakes are peeled off and crushed to obtain zirconia nanopowders.

Embodiment 2

[0020] In the reaction vessel, add the ammonium fluoride aqueous solution that weight percent concentration is 1.0%, zirconium piece is made anode, and graphite sheet is made cathode, and the distance between anode and cathode is 1.5cm, adopts 3.0V direct current to carry out anodic oxidation, room temperature reaction 50 minutes, then Take out the zirconium sheet, wash it with a small amount of water, dry it at <105°C, and then peel off the uniform and loose oxides on the surface of the zirconium sheet, and then crush it to obtain zirconia nanopowder.

Embodiment 3

[0022] In reaction vessel, add the sodium fluoride aqueous solution that weight percent concentration is 0.8%, zirconium sheet is made anode, and platinum sheet is made cathode, and the distance between anode and cathode is 1.5cm, adopts 3.3V direct current to carry out anodic oxidation, room temperature reaction 60 minutes, then Take out the zirconium flakes, wash them with a small amount of water, dry them at <105°C, peel off the uniform and loose oxides on the surface of the zirconium flakes, and grind them to get zirconium dioxide nanopowder.

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Abstract

The preparation method of the zirconium dioxide nano-powder of the present invention relates to oxides of zirconium, and adopts an anodic oxidation method to prepare the zirconium dioxide nano-powder, adding a fluoride aqueous solution with a concentration of 0.5 to 1.0% by weight in a reaction vessel, The zirconium sheet is used as the anode, the platinum sheet or the graphite sheet is used as the cathode, the distance between the anode and the cathode is 1.5cm, the anodic oxidation is carried out by 3.0-3.5V direct current, and the room temperature is reacted for 30-60 minutes, then the zirconium sheet is taken out, washed with a small amount of water, and then Dry in the natural state or at a low temperature <105°C, then peel off the uniform and loose oxides on the surface of the zirconium sheet, and then crush it to obtain cubic phase zirconia nanoparticles with a uniform particle size of 10-100nm. Powder. The method overcomes the disadvantages of the existing zirconia powder preparation method, such as complex technical process, large amount of waste liquid, and high-temperature calcination.

Description

technical field [0001] The technical solution of the present invention belongs to oxides of zirconium, in particular, relates to a preparation method of zirconium dioxide nanopowder. Background technique [0002] Zirconium dioxide has excellent physical and chemical properties, and is widely used in ceramics, refractory materials, catalysts, catalyst carriers, piezoelectric components, optical fiber connectors, gas sensors, solid fuel cells and thermal barrier coatings. The smaller the particle size of the zirconia powder, the larger the specific surface area, and the sharp increase in the surface energy of the powder, which can improve and enhance its application performance. For example, the sintering activation energy of zirconia nanopowder is small, the sintering densification rate is accelerated, the sintering temperature is reduced, and the sintering time is shortened. [0003] At present, the main methods for preparing zirconia powder include precipitation method, so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02
Inventor 赵建玲李养贤徐荣清王西新米颖娟
Owner HEBEI UNIV OF TECH