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A kind of preparation method of network tetragonal phase zirconia nanopowder

A technology of phase zirconia and nano-powders, which is applied in the field of preparation of net-shaped tetragonal-phase zirconia nano-powders, can solve the problems of long preparation reaction time, unfavorable industrial production, and increased production costs, and achieve the goal of overcoming long reaction time, Lower calcination temperature and faster synthesis

Inactive Publication Date: 2017-05-03
方一航 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the powder prepared by this method has the advantages of complete grain development, small particle size and uniform distribution, less agglomeration, and good sintering performance, the preparation process of this method is relatively harsh, and the requirements for equipment are high, resulting in increased production costs and long reaction times. Long, not conducive to industrial production

Method used

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  • A kind of preparation method of network tetragonal phase zirconia nanopowder
  • A kind of preparation method of network tetragonal phase zirconia nanopowder
  • A kind of preparation method of network tetragonal phase zirconia nanopowder

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Experimental program
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Effect test

Embodiment 1

[0031] Weigh 0.05mol Zr(NO 3 ) 4 ·5H 2 O and 0.0012mol Y (NO 3 ) 3 ·6H 2 O is dissolved in 1L of deionized water to form 0.05mol / L Zr(NO 3 ) 4 3%Y(NO 3 ) 3 Aqueous solution (1); then weigh 14.61g of EDTA, 17.8g of acrylamide, 3.56g of N,N'-methylenebisacrylamide and 0.05g of ammonium persulfate and dissolve in solution (1), and stir well . Then the above mixed solution was transferred to a water bath at 80°C for 2 hours, and after the gel was complete, it was taken out and cooled to room temperature. The gel product was directly dried at 90°C, and the obtained xerogel was raised to 300°C at a rate of 3°C / min in a ventilated annealing furnace, and kept for 2 hours, and the treated product was placed in an air atmosphere at Treat at 800°C for 2 hours to obtain network tetragonal zirconia nanopowder.

[0032] XRD analysis was carried out on the above-mentioned network tetragonal phase zirconia nanopowder, and the results showed that the product was pure tetragonal ZrO ...

Embodiment 2

[0034] Weigh 0.05molZrO(NO 3 ) 2 and 0.0025mol Y(NO 3 ) 3 ·6H 2 O is dissolved in 1L of deionized water to form 0.05mol / L ZrO(NO 3 ) 2 5% YPO 4 Aqueous solution (1); then weigh 9.61g of citric acid, 18.0g of acrylamide, 3.80g of N,N'-methylenebisacrylamide and 0.05g of ammonium persulfate and dissolve in solution (1), and Stir well to combine. Then the above mixed solution was transferred to a water bath at 80°C for 2 hours, and after the gel was complete, it was taken out and cooled to room temperature. The gel product was directly dried at 90°C, and the obtained dry gel was raised to 320°C at a rate of 3°C / min in a ventilated annealing furnace, and kept for 2 hours, and the treated product was heated in an air atmosphere at 700°C ℃ treatment for 2 hours to obtain network tetragonal phase zirconia nanopowder.

[0035] The XRD analysis of the above network tetragonal zirconia nanopowder shows that the main component of the product is pure tetragonal ZrO 2 powder (see...

Embodiment 3

[0037] Weigh 0.06molZr(CH 3 COO) 4 and 0.0021molY 2 (SO 4 ) 3 ·8H 2 O was dissolved in 1.2L of deionized water to form 0.05mol / L of Zr(CH 3 COO) 4 7%Y 2 (SO 4 ) 3 aqueous solution (1); then weigh 17.53g of EDTA, 18.2g of acrylamide, 4.00g of N,N'-methylenebisacrylamide and 0.05g of ammonium persulfate and dissolve in solution (1), and fully Stir well. Then the above mixed solution was transferred to a water bath at 80°C for 2 hours, and after the gel was complete, it was taken out and cooled to room temperature. The gel product was directly dried at 90°C, and the obtained dry gel was raised to 280°C at a rate of 3°C / min in a ventilated annealing furnace, and kept for 2 hours, and the treated product was placed in an air atmosphere at Treat at 1000°C for 2 hours to obtain network tetragonal zirconia nanopowder.

[0038] The XRD analysis of the above network tetragonal zirconia nanopowder shows that the main component of the product is pure tetragonal ZrO 2 powder (...

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Abstract

The invention discloses a preparation method of meshy tetragonal phase zirconia nano powder. The preparation method comprises the following steps: dissolving inorganic salt of zirconium and yttrium in distilled water, then adding substances, such as acrylamide, N,N'-methylene bisacrylamide and ammonium persulfate, and finally obtaining the nano-scale meshy tetragonal phase zirconia powder by controlling the solubility, reaction temperature, reaction time and heat treatment temperature of the substances. The meshy tetragonal phase nano powder obtained by adopting the preparation method has good crystallinity and higher purity and has the meshy diameter of about 500-1500nm and the nano particle diameter of about 10-20nm. The method for preparing the meshy zirconia powder, which is provided by the preparation method, has the advantages of high tetragonal phase product purity, good particle dispersibility, simplicity in process operation, good repeatability, high synthesis speed, wide sources of synthesis raw materials and low price.

Description

technical field [0001] The invention relates to a method for preparing a net-like tetragonal phase zirconia nano-powder, which belongs to the technical field of nano-powder materials. Background technique [0002] Zirconia ZrO 2 As an important oxide ceramic material, ceramics have high melting point, high boiling point, high hardness, and are insulators at room temperature. At the same time, they have excellent properties such as electrical conductivity, heat resistance, corrosion resistance, and stable redox property. An excellent inorganic non-metal raw material has been highly valued at home and abroad in recent years. Tetragonal zirconia ceramics not only have the above excellent properties, but also can transform the monoclinic zirconia that is unstable at room temperature into a stable tetragonal zirconia, making it have more excellent heat resistance, corrosion resistance, ceramic toughening and other advantages. , has become another hot spot in the field of materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02B82Y30/00
Inventor 方一航李志刚张梦贤张平赵先锐李勤涛陈卫平
Owner 方一航
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