Method for preparing ultrafine-yttria stable zirconia powder

A technology for stabilizing zirconia and yttrium oxide, which is applied in the field of high-temperature structural ceramic material preparation to achieve the effects of uniform powder particle size, good crystallinity and good sintering performance

Inactive Publication Date: 2016-07-27
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims to overcome the defects of the existing yttria-stabilized zirconia preparation method, and the invention provides a preparation method of ultrafine yttria-stabilized zirconia powder

Method used

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  • Method for preparing ultrafine-yttria stable zirconia powder
  • Method for preparing ultrafine-yttria stable zirconia powder
  • Method for preparing ultrafine-yttria stable zirconia powder

Examples

Experimental program
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Embodiment 1

[0039] Preparation of ultrafine yttria stabilized zirconia powder

[0040] (1) First prepare ZrOCl with a concentration of 0.4mol / L with deionized water 2 solution and a 0.2mol / L yttrium nitrate solution. Measure the prepared ZrOCl 2 Solution 200ml, Y(NO 3 ) 3 Solution 21ml, 2ml CE64 solution, adjust the pH value to 7 with ammonia water, stir thoroughly for half an hour and heat at 100°C for 24h to obtain a white precursor;

[0041] (2) Put the obtained white precursor into a reaction kettle at 150°C for 24 hours to obtain a white precipitate of crystallinity; wash the white precipitate repeatedly with deionized water and filter it until there is no Cl in the white precipitate - Finally, wash twice with absolute ethanol and filter with suction, this purpose is to reduce the agglomeration between powders;

[0042] (3) Calcinate the washed white precipitate at 900°C, 1000°C, 1100°C and 1200°C for 2 hours to obtain 5mol% Y 2 o 3 -ZrO 2 powder.

[0043] Characterization m...

Embodiment 2

[0049] (1) First prepare ZrOCl with a concentration of 0.4mol / L with deionized water 2 solution and a 0.2mol / L yttrium nitrate solution. Measure the prepared ZrOCl 2 Solution 200ml, Y(NO 3 ) 3 Solution 38ml, 2ml CE64 solution, adjust the pH value to 7 with ammonia water, stir thoroughly for half an hour and heat at 100°C for 24h to obtain a white precursor;

[0050] (2) Put the obtained white precursor into a reaction kettle at 150°C for 24 hours to obtain a white precipitate of crystallinity; wash the white precipitate repeatedly with deionized water and filter it until there is no Cl in the white precipitate - Finally, wash twice with absolute ethanol and filter with suction, this purpose is to reduce the agglomeration between powders;

[0051] (3) Calcinate the washed white precipitate at 900°C, 1000°C, 1100°C and 1200°C for 2 hours to obtain 8mol% Y 2 o 3 -ZrO 2 powder.

[0052] Laser particle size: The secondary particle size of the powder prepared in this experim...

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Abstract

The invention relates to a method for preparing ultrafine-yttria stable zirconia powder. The method comprises the steps: (1) adding an alkaline reagent into a solution containing Zr<4+> and Y<3+>, carrying out thorough stirring, and carrying out heating for 36 to 48 hours at the temperature of 100 DEG C to 120 DEG C so as to form white precipitates in the solution; (2) carrying out heat preservation on the white precipitates prepared in the step (1) for 24 to 48 hours at the temperature of 150 DEG C to 180 DEG C; and (3) cleaning the white precipitates subjected to heat preservation treatment in the step (2), and then, carrying out calcination at the temperature of 900 DEG C to 1,200 DEG C, thereby obtaining the yttria stable zirconia powder.

Description

technical field [0001] The invention relates to a preparation method of ultrafine spherical yttria-stabilized zirconia powder, and belongs to the technical field of preparation of high-temperature structural ceramic materials. Background technique [0002] Zirconia is an extremely widely used oxygen ion solid electrolyte. The zirconia solid electrolyte doped with an appropriate amount of yttrium oxide as a stabilizer has a large number of oxygen vacancies, and these oxygen vacancies will undergo directional migration as carriers under the action of an external electric field. The conductivity of the zirconia solid electrolyte is greatly enhanced, so people have used the characteristics of the zirconia solid electrolyte to prepare zirconia-based automotive sensors and various types of zirconia oxygen meters. With the rapid development of my country's industry, zirconia-based automotive sensors and various types of zirconia oxygen meters have been widely used in the automotive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626
Inventor 夏金峰粘洪强董梦云冯涛蒋丹宇
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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