Yttria-stabilized zirconia powder and preparation method thereof

A technology for stabilizing zirconia and yttrium oxide, applied in the field of ZrO2 composite ceramic materials, can solve the problems of difficult raw material source of organic alkoxide hydrolysis method, no industrialized production, harsh conditions of hydrothermal method, etc. Aging ability, the effect of avoiding hard agglomeration

Active Publication Date: 2014-04-09
YAAN YUANCHUANG CERAMIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, there are quite a lot of hard agglomerations in the powder produced by the co-precipitation method; the source of raw materials for the organic alcohol salt hydrolysis method is difficult, and the price is high; the hydrothermal method has harsh conditions and high costs, and industrial production has not yet been formed in China.

Method used

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  • Yttria-stabilized zirconia powder and preparation method thereof
  • Yttria-stabilized zirconia powder and preparation method thereof
  • Yttria-stabilized zirconia powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Prepare Zr in a stirred mill 4+ Concentration is the zirconium oxychloride solution of 2mol / L, adds the yttrium oxide of 2mol% (accounting for Zr4+ total amount) and the third component, heating and stirring to dissolve the yttrium oxide, the third component is 1wt% of alumina, 0.2wt% of cerium oxide, 0.2wt% of lanthanum oxide, 0.5wt% of magnesium oxide, and 0.1% of calcium oxide;

[0041] (2) Then add 3wt% polyethylene glycol relative to the mass of zirconia, and stir evenly;

[0042] (3) Finally, slowly add the precipitating agent solution to the uniformly stirred solution, and the precipitating agent is ammonium bicarbonate and urea.

[0043] (4) Until the zirconium ions and yttrium ions are completely precipitated, the reaction is completed, and the final pH value is controlled at 8;

[0044] (5) Afterwards, wash with water, filter, and dry in an oven. When drying, set the temperature at 120°C and dry for 3 hours. Calcining the obtained nano-zirconia composit...

Embodiment 2

[0048] (1) Put a certain amount of zirconia balls in the stirring mill in advance, and prepare Zr 4+ Concentration is the zirconium oxychloride solution of 2mol / L, adds the yttrium oxide of 8mol% (accounting for Zr 4+ total amount) and the third component, heating and stirring to dissolve the yttrium oxide, the third component is 0.5wt% of alumina, 0.2wt% of cerium oxide, 0.5wt% of magnesium oxide, and 0.3% of calcium oxide;

[0049] (2) Then add 3wt% polyacrylic acid relative to the mass of zirconia, and stir evenly;

[0050] (3) Finally, slowly add a solid-phase precipitant to the uniformly stirred solution. The precipitant is ammonium bicarbonate and ammonium carbonate, and mix with ball milling for 8 hours; the obtained particle size is D 50 Colloid aggregates <0.8 μm. Using solid-liquid reaction, the generation of waste water is greatly reduced, and the agglomeration of micelles is destroyed by ball mill stirring. Compared with traditional mechanical agitation, ball mi...

Embodiment 3

[0056] (1) Pre-place a certain ratio of zirconia balls in the stirring mill, and prepare Zr 4+ Zirconium oxychloride solution with a concentration of 2mol / L, adding 2-8mol% yttrium oxide (accounting for Zr 4+ total amount) and the third component, heating and stirring to dissolve the yttrium oxide, the third component is 0.5wt% of alumina, 0.2wt% of cerium oxide, 0.5wt% of magnesium oxide, and 0.3% of calcium oxide;

[0057] (2) Then add 3wt% polyacrylic acid relative to the mass of zirconia, and stir evenly;

[0058] (3) Finally, slowly add a solid-phase precipitant to the uniformly stirred solution. The precipitant is ammonium bicarbonate and ammonium carbonate, and mix with ball milling for 4 hours; the obtained particle size is D 50 Colloid aggregates <0.8 μm.

[0059] (4) Until the zirconium ions and yttrium ions are completely precipitated, the reaction is completed, and the final pH value is controlled at 7;

[0060] (5) The final sol was poured into a microwave dig...

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Abstract

The invention relates to yttria-stabilized zirconia powder and a preparation method thereof. The yttria-stabilized zirconia powder has the composition characteristics that yttria is taken as a stabilizer of a zirconia material; the powder comprises a doping system formed by one or more following third components: alumina, ceria, lanthana, copper oxide, magnesium oxide and calcium oxide, wherein the weight of the yttria is 2-8mol%, and the total doping weight of the alumina, the ceria, the lanthana, the copper oxide, the magnesium oxide and the calcium oxide is 0-5wt%. According to the yttria-stabilized zirconia powder and the preparation method, the deficiencies of an existing liquid phase preparation process of nanometer zirconia powder are overcome, and the prepared nanometer ZrO2 composite powder has the performance of uniformity in dispersion of components, uniform grain size, super-fineness, high sintering activity, good liquidity and the like. Furthermore, the preparation method is simple in process and low in cost and is easy to industrialize.

Description

[0001] The present invention claims that the applicant submitted to the State Intellectual Property Office of China on September 28, 2013. The application number is CN201310451704.6, and the invention name is a Chinese invention patent application named "Yttrium Oxide Stabilized Zirconia Powder and Its Preparation Method" The entire content of the above-mentioned application is incorporated herein by reference. technical field [0002] The invention relates to a method for preparing yttria-stabilized zirconia powder, which belongs to ZrO 2 Technical field of composite ceramic materials. Background technique [0003] Zirconia composite material is a new type of structural ceramic material, which has excellent mechanical properties and material process characteristics, such as high specific surface area and abundant surface defects, and has weak acid, weak alkali and redox properties. It is a P-type semiconductor Materials, which are easy to generate oxygen holes, can be wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 罗忠义王恩远
Owner YAAN YUANCHUANG CERAMIC
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