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Yttrium-stabilized zirconia ceramic nano-powder as well as preparation method and application thereof

A technology of yttrium-stabilized zirconia and nano-powder, which is applied in the fields of zirconia, chemical instruments and methods, preparation/processing of rare earth metal compounds, etc.

Pending Publication Date: 2020-12-22
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, YSZ transparent ceramics have not been widely used in the market

Method used

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  • Yttrium-stabilized zirconia ceramic nano-powder as well as preparation method and application thereof
  • Yttrium-stabilized zirconia ceramic nano-powder as well as preparation method and application thereof
  • Yttrium-stabilized zirconia ceramic nano-powder as well as preparation method and application thereof

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Experimental program
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preparation example Construction

[0082] Preparation of Precipitant Solution. Wherein, the precipitating agent can be at least one of ammonia water, ammonium carbonate and urea. Add a certain amount of dispersant to the precipitant mother liquor before titration to obtain a precipitant solution containing dispersant. Among them, polyethylene glycol, polyethyleneimine, ammonium polyacrylate and ammonium citrate can be selected as the dispersant. The content of the dispersant may be 0.1wt%-5wt%. The concentration of the precipitant in the precipitant solution containing the dispersant is controlled between 0.01 and 4.0 mol / L.

[0083] Adding the mixed solution of metal ions into the precipitating agent solution containing the dispersant, and fully stirring to obtain the precipitating liquid, wherein the terminal pH of the precipitating liquid is 7-12. Wherein, the metal ion mixed solution is added in dropwise addition or spray addition. Wherein the speed of adding dropwise can be 1~40ml / min. Normal situatio...

Embodiment 1

[0101] press Y 0.16 Zr 0.84 o 1.92 Chemical composition, respectively measure 120ml of ZrOCl with a concentration of 1.5mol / L 2 solution and 14.20ml concentration is 2.414mol / L Y(NO 3 ) 3 Pour the solution into a beaker, first add a small amount of deionized water to mix evenly, and finally add deionized water to set the volume to 600ml. At this time, the Zr in the mixed solution 4+ The concentration is 0.3mol / L. Then prepare 500ml concentration of 0.7mol / L ammonia precipitant solution, and add 0.4270g of PEG4000 as a dispersant. Add the mixed solution of metal ions dropwise (dropwise added) into the ammonia precipitant at a rate of 20ml / min and stir thoroughly, stop the titration when the pH of the precipitant solution = 8.75, continue to stir for 10min, and age at 25°C 1h. The aged slurry was washed 4 times with deionized water and 2 times with absolute ethanol. The washed precipitate was dried in an oven at 70°C for 20 hours, and the dried powder was passed through a...

Embodiment 2

[0104] press Y 0.16 Zr 0.84 o 1.92 Chemical composition, respectively measure 120ml of ZrOCl with a concentration of 1.5mol / L 2 solution and 14.20ml concentration is 2.414mol / L Y(NO 3 ) 3 Pour the solution into a beaker, first add a small amount of deionized water to mix evenly, and finally add deionized water to set the volume to 600ml. At this time, the Zr in the mixed solution 4+ The concentration is 0.3mol / L. Then prepare 500ml concentration of 0.7mol / L ammonia precipitant solution, and add 0.3251g of PEG4000 as a dispersant. Add the mixed solution of metal ions dropwise into the ammonia precipitation agent at a rate of 20ml / min and stir thoroughly. Stop the titration when the pH of the solution of the precipitation agent is 9.5, continue to stir for 10min, and age at 25°C for 1h. The aged slurry was washed 4 times with deionized water and 2 times with absolute ethanol. The washed precipitate was dried in an oven at 70°C for 20 hours, and the dried powder was passed ...

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Abstract

The invention relates to yttrium-stabilized zirconia ceramic nano-powder as well as a preparation method and application thereof; the yttrium-stabilized zirconia ceramic nano-powder is composed of Y2xZr1-2xO2-x, wherein x is more than 0 and less than 0.15; and the preparation method is characterized by comprising the following steps: (1), respectively weighing a metal ion salt solution containingZr<4+> and a metal ion salt solution containing Y<3+> according to a stoichiometric ratio ofY2xZr1-2xO2-x, and performing mixing to obtain a metal ion mixed solution; (2), adding the obtained metal ion mixed solution into a precipitant solution containing a dispersing agent, and fully performing stirring to obtain a precipitation solution, the precipitant being at least one of ammonia water, ammonium carbonate, ammonium bicarbonate and urea; and (3), aging, washing, drying and sieving the obtained precipitation solution, and performing calcining at 500-1500 DEG C for 1-10 hours to obtain the yttrium-stabilized zirconia ceramic nano-powder.

Description

technical field [0001] The invention provides a method for preparing yttrium-stabilized zirconia ceramic powder and highly transparent yttrium-stabilized zirconia ceramics, in particular to a method for preparing yttrium-stabilized zirconia nano-powder by co-precipitation, and using the above-mentioned yttrium-stabilized zirconia Nano powder is used as a raw material, and a combination of pre-sintering and hot isostatic pressing (HIP) is used as a sintering process to prepare highly transparent yttrium-stabilized zirconia ceramics and a preparation method thereof, which are in the technical field of transparent ceramic preparation. Background technique [0002] Traditional ZrO 2 Because of its high toughness, high bending strength and high wear resistance in structure, ceramics have the advantages of high temperature resistance and corrosion resistance in function, and are widely used in rolling bearings, grinding media, refractory materials and other fields. Zirconia is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/02C01F17/32C01F17/10C04B35/48C04B35/622C04B35/626B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G25/02C01P2004/62C01P2004/64C01P2004/82C04B35/48C04B35/622C04B35/62675C04B2235/3225C04B2235/656C04B2235/6567C04B2235/658C04B2235/6582C04B2235/6583C04B2235/9653
Inventor 李江陈鹏辉刘强姜楠张星李晓英石云谢腾飞
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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