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A preparation method of spherical yttrium-stabilized zirconia nanopowder with uniform size

A technology of yttrium-stabilized zirconia and nanopowder, which is applied in zirconia and nanotechnology, can solve the problems of poor crystallinity of nanoparticles, cumbersome treatment of chloride ions, and high requirements for reaction equipment, achieving less growth defects, high hardness, good orientation effect

Active Publication Date: 2018-08-14
安徽凯盛应用材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In recent years, some new technologies have also emerged, such as Chinese invention patent 201310043645.9, which uses supercritical hydrothermal synthesis of nano-zirconia powder, the crystallinity of the prepared nanoparticles is poor, and the requirements for reaction equipment are high. high cost etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of spherical yttrium-stabilized zirconia nano-powder with uniform size adopts the following specific steps:

[0030] Weigh 284g of zirconium sulfate and 14g of yttrium sulfate powder, add a certain amount of water to make a 1M solution. The precipitant urea is added to the above prepared solution, wherein the molar ratio of zirconium sulfate and urea is 1:6. Then add 3% dispersant polyethylene glycol-4000 and mix thoroughly. The above solution was poured into a hydrothermal reactor, the filling volume was 70%, and the mixture was stirred at room temperature for 30 minutes at a stirring rate of 200 rpm.

[0031] The reaction was carried out at 70°C, and the reaction was completed after completion. The product taken out is washed with water and ethanol, freeze-dried, and then stabilized and calcined at 400° C. for 1 hour. After the stabilization treatment, nano-scale semi-stable yttrium zirconia is prepared.

[0032] The powder obtained by the abov...

Embodiment 2

[0034] A preparation method of spherical yttrium-stabilized zirconia nano-powder with uniform size adopts the following specific steps:

[0035] Weigh 343g of zirconium nitrate and 9g of yttrium nitrate powder, add a certain amount of water to make a 1M solution. Add precipitant urea to the prepared solution, wherein the molar ratio of zirconium nitrate and urea is 1:4. Then add 5% dispersant polyethylene glycol-4000 and mix well.

[0036] The above solution was poured into a hydrothermal reaction kettle with a filling volume of 70%, first stirred at room temperature for 30 minutes, and the stirring rate was 300 rpm. The reaction was carried out at a temperature of 150° C. for 4 hours, and the reaction was completed after the precipitation was complete. The product is taken out, washed with water and ethanol, and freeze-dried to obtain nano-scale semi-stable yttrium zirconia.

[0037] The dried nano-scale yttrium-stabilized zirconium is stabilized and calcined at 600° C. fo...

Embodiment 3

[0040] A preparation method of spherical yttrium-stabilized zirconia nano-powder with uniform size adopts the following specific steps:

[0041] Weigh 284g of zirconium sulfate and 14g of yttrium sulfate powder, add a certain amount of water to make a 1 M solution. Add precipitant urea to the prepared solution, wherein the molar ratio of zirconium sulfate and urea is 1:2.5. Then add 2% dispersant polyethylene glycol and mix well.

[0042] The above solution was poured into the reaction kettle, the filling volume was 80%, and the mixture was stirred at room temperature for 30 minutes. The reaction was carried out at 200°C for 4 hours. After the reaction, it was naturally cooled. The product is taken out, washed with water and ethanol, and freeze-dried to obtain nano-scale semi-stable yttrium zirconia.

[0043] The dried nano-scale yttrium-stabilized zirconium is stabilized and calcined at 500° C. for 1 hour, and the tetragonal spherical yttrium-stabilized zirconia nano-powd...

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Abstract

The invention provides a preparation method of uniform-size spherical yttrium-stabilized zirconia nano powder. The method is characterized by comprising the following steps: making a zirconium source and a yttrium source into a solution; adding a precipitant into the solution; stirring sufficiently and adding a dispersing agent; putting the mixed solution into a reaction kettle; stirring at room temperature, and heating for reacting for a period of time to obtain a product; washing the product with water and ethanol; performing freeze drying to obtain semi-stable nano-scale yttrium-stabilized zirconium; and performing thermal stabilization treatment to obtain spherical yttrium-stabilized zirconia nano powder. The method provided by the invention has the following advantages: the prepared yttrium-stabilized zirconia nano powder is of uniform size distribution, spherical morphology and high crystallinity and exists stably in a tetragonal phase under a room-temperature condition.

Description

Technical field: [0001] The invention relates to the field of nanomaterial production, in particular to a preparation method of spherical yttrium-stabilized zirconia nanopowder with uniform size. Background technique: [0002] Zirconia (ZrO 2 ) is a very important structural and functional material, with chemical stability, wear resistance, low thermal conductivity, high temperature resistance, corrosion resistance, thermal stability and impact resistance and other characteristics, is a refractory coating material, high temperature It is an important raw material for structural materials, biological materials and electronic materials, and has been widely used in the fields of energy, materials, electronics and environment. [0003] Pure ZrO at room temperature 2 It is a white crystal with a melting point of 2680 °C and a boiling point of 4275 °C. Zirconium dioxide is a polycrystalline system and can be divided into three crystal forms: monoclinic (Monoclinic, m-ZrO 2 ), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02B82Y40/00
CPCB82Y40/00C01G25/02C01P2004/32C01P2004/64C01P2004/80C01P2006/12
Inventor 王永和刘强秦云峰严回胡石磊董树人
Owner 安徽凯盛应用材料有限公司
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