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Preparation method of yttrium-stabilized nanometer zirconium dioxide powder

A nano-zirconia and yttrium stabilization technology, applied in the field of material science, can solve the problems of different particle sizes, hard agglomeration, and uneven distribution of nano-powder components, and achieve the effect of uniform distribution of yttrium elements and small particle size.

Active Publication Date: 2013-02-13
丽水亦众新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the different properties of zirconium ions and yttrium ions, the preparation of 3Y-ZrO 2 In the process of powder, it is very easy to cause the segregation of similar elements, resulting in uneven distribution of zirconium ions and yttrium ions, resulting in the preparation of 3Y-ZrO 2 Nano powder components are unevenly distributed, particle sizes are different, and hard agglomeration occurs, which deteriorates the performance of zirconia ceramic products

Method used

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  • Preparation method of yttrium-stabilized nanometer zirconium dioxide powder

Examples

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Embodiment 1

[0020] Weigh 1.0 mol of zirconium oxychloride and dissolve in deionized water to form a 4.0 mol / l solution, weigh 0.03 mol of yttrium nitrate and dissolve in deionized water to form a 2.0 mol / l solution, mix the above two solutions and stir well. Weigh 0.4 mol citric acid and dissolve it in 1.8 mol ethylene glycol, and then add it to the above solution to form a mixed solution. After the mixed solution was stirred evenly, the temperature was raised to 130° C. for 2 hours, and then the temperature was further raised to 200° C. for 4 hours to obtain a crisp black substance. Grind the above-mentioned brittle black substance, put it into a high-alumina crucible, and calcinate it in an air atmosphere at 1000°C for 2 hours to obtain yttrium-stabilized nano-zirconia powder. The above-mentioned yttrium-stabilized nano-zirconia powder was observed with a scanning electron microscope, and the results showed that the average particle size of the powder was about 100 nm, and the powder pa...

Embodiment 2

[0022] Weigh 1.0 mol of zirconium nitrate and dissolve in absolute ethanol to form a 2.0 mol / l solution, weigh 0.04 mol of yttrium acetate and dissolve in absolute ethanol to form a 1.0 mol / l solution, mix the above two solutions and stir well. Weigh 0.8 mol citric acid and dissolve it in 4.8 mol ethylene glycol, and then add it to the above solution to form a mixed solution. After the mixed solution was evenly stirred, the temperature was raised to 125° C. for 2 hours, and then the temperature was further raised to 190° C. for 2 hours to obtain a crisp black substance. Grind the above-mentioned brittle black substance, put it into a high-alumina crucible, and calcinate it in an air atmosphere at 600°C for 1 hour to obtain yttrium-stabilized nano-zirconia powder. The above-mentioned yttrium-stabilized nano-zirconia powder was observed with a scanning electron microscope, and the results showed that the average particle size of the powder was about 30 nm, and the powder particl...

Embodiment 3

[0024] Weigh 1.0 mol of zirconium acetate and dissolve in absolute ethanol to form a 1.0 mol / l solution, weigh 0.02 mol of yttrium nitrate and dissolve in deionized water to form a 1.0 mol / l solution, mix the above two solutions and stir well. Weigh 1.0 mol of citric acid and dissolve it in 4.0 mol of ethylene glycol, and then add it to the above solution to form a mixed solution. After the mixed solution was stirred evenly, the temperature was raised to 135° C. for 4 hours, and then the temperature was further raised to 220° C. for 2 hours to obtain a crisp black substance. Grind the above-mentioned brittle black substance, put it into a high-alumina crucible, and calcinate it in an air atmosphere at 900°C for 1 hour to obtain yttrium-stabilized nano-zirconia powder. The above-mentioned yttrium-stabilized nano-zirconia powder was observed with a scanning electron microscope, and the results showed that the average particle size of the powder was about 90 nm, and the powder pa...

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Abstract

The invention discloses a preparation method of yttrium-stabilized nanometer zirconium dioxide powder. The preparation method comprises the following steps of: respectively dissolving inorganic salt of zirconium and inorganic salt of yttrium into a solvent, and then mixing with ethylene glycol solution of citric acid; heating mixed solution to 125-135 DEG C and thermally insulating for 2-4 hours, and heating the mixed solution to 180-220 DEG C and thermally insulating for 2-4 hours so as to obtain a crisp black substance; and burning the crisp substance at 600-1100 DEG C so as to obtain the nanometer zirconium dioxide powder with grain size of 30-120 nm, good particle dispersion and uniform yttrium element distribution. According to the invention, the source of feed is wide and easy to obtain, the preparation method is simple and controllable, through a complexing action of the citric acid on zirconium ions and yttrium ions, and bonding and steric hindrance actions of ethylene glycol on the zirconium ions and the yttrium ions, the yttrium ions can be uniformly distributed in a zirconium substrate material, so that the nanometer zirconium dioxide powder with the small grain size and the uniform distribution of the yttrium element can be finally obtained.

Description

technical field [0001] The invention relates to a preparation method of yttrium-stabilized nano-zirconia powder, which belongs to the technical field of material science. Background technique [0002] Zirconia ceramics have excellent properties such as high strength, high hardness, high elastic modulus, and good chemical stability. They are widely used in catalysts, oxygen sensitive sensors, high-temperature solid-state fuel cells, chemically inert surface materials, refractory materials, and biological materials. It has broad application prospects. However, pure zirconia ceramics are extremely brittle due to their low resistance to crack generation and development, which limits their use as engineering materials in many applications. In 1975, Garvie used GaO as a modifier to prepare partially stabilized zirconia ceramics (Ga-PSZ). For the first time, the toughening effect of zirconia martensitic transformation was used to improve the toughness and strength of the material;...

Claims

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Application Information

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IPC IPC(8): C01G25/02B82Y30/00
Inventor 王焕平刘丹谢红艳王建武
Owner 丽水亦众新材料科技有限公司
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