Preparation method of yttrium oxide-stabilized zirconium oxide powder with hollow spherical nanostructure

A technology for stabilizing zirconia and nanostructure, which is applied in the field of preparation of hollow spherical nanostructure yttrium oxide stabilized zirconia powder, achieving the effects of high fluidity, low bulk density and simple process flow

Active Publication Date: 2010-06-09
GRIPM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] At present, there is no research and patent report o...

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  • Preparation method of yttrium oxide-stabilized zirconium oxide powder with hollow spherical nanostructure
  • Preparation method of yttrium oxide-stabilized zirconium oxide powder with hollow spherical nanostructure
  • Preparation method of yttrium oxide-stabilized zirconium oxide powder with hollow spherical nanostructure

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Experimental program
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Embodiment 1

[0026] A method for preparing hollow spherical nano-structured yttrium oxide stabilized zirconia powder:

[0027] (1) Preparation of amorphous yttria stabilized zirconia powder with an amorphous phase structure,

[0028] ①According to the weight ratio of yttrium chloride: zirconium oxychloride=1:11, take yttrium chloride and zirconium oxychloride, add yttrium chloride and zirconium oxychloride to water, completely dissolve and mix thoroughly;

[0029] ② Add 40% ammonia water uniformly and quickly to co-precipitate the two salts to obtain yttria-stabilized zirconia with crystal water. After aging for 5 hours, a gel is obtained;

[0030] ③Fully mix the gel and water in a mass ratio of 1:1, add a dispersant and a binder to the mixed liquid. The dispersant is ethylene glycol, and the added amount is 3% of the weight percentage of the slurry. The binder adopts polyvinyl alcohol, and the addition amount is 3% of the weight percentage of the slurry;

[0031] ④ Ball milling for 60 minutes, aft...

Embodiment 2

[0040] A method for preparing hollow spherical nano-structured yttrium oxide stabilized zirconia powder:

[0041] (1) Preparation of amorphous yttria stabilized zirconia powder with an amorphous phase structure,

[0042] ①According to the weight ratio of yttrium chloride: zirconium oxychloride=1:11, take yttrium chloride and zirconium oxychloride, add yttrium chloride and zirconium oxychloride to water, completely dissolve and mix thoroughly;

[0043] ②Add ammonia water with a concentration of 30% uniformly and quickly to co-precipitate the two salts to obtain yttria-stabilized zirconia with crystal water. After aging for 4 hours, a gel is obtained;

[0044] ③Fully mix the gel and alcohol according to the mass ratio of 1:1, add dispersant and binder to the mixed liquid, dispersant is ethylene glycol, and the added amount is 2% of the weight percentage of the slurry. The binder adopts polyvinyl alcohol, and the addition amount is 4% of the weight percentage of the slurry;

[0045] ④ Aft...

Embodiment 3

[0053] A method for preparing hollow spherical nano-structured yttrium oxide stabilized zirconia powder:

[0054] (1) Preparation of amorphous yttria stabilized zirconia powder with an amorphous phase structure,

[0055] ①According to the weight ratio of yttrium chloride: zirconium oxychloride=1:11, take yttrium chloride and zirconium oxychloride, add yttrium chloride and zirconium oxychloride to water, completely dissolve and mix thoroughly;

[0056] ② Add 50% ammonia water uniformly and quickly to co-precipitate the two salts to obtain yttria-stabilized zirconia with crystal water. After aging for 4 hours, a gel is obtained;

[0057] ③Fully mix the gel and water according to the mass ratio of 1:1, add dispersant and binder to the mixed liquid, dispersant is ethylene glycol, and the added amount is 4% of the weight percentage of the slurry. The binder adopts polyvinyl alcohol, and the addition amount is 2% of the weight percentage of the slurry;

[0058] ④ Ball milling for 40 minutes,...

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Abstract

The invention provides a preparation method of yttrium oxide-stabilized zirconium oxide powder with hollow a spherical nanostructure, belonging to the technical field of material preparation. The method comprises the steps of: taking noncrystal yttrium oxide-stabilized zirconium oxide powder with an amorphous phase structure as raw materials; heating with over-distance plasma flame; collecting by means of water cooling; and drying with low temperature to prepare the yttrium oxide-stabilized zirconium oxide powder with the hollow spherical nanostructure. The prepared powder has the characteristics of low fill density and high fluidity, and the like, and the microstructure is the nanocrystalline hollow spherical nanostructure, therefore, the powder is particularly suitable for a plasma spraying technology to prepare a high-temperature abrasion-resistant good-sealing coating, has simple technological process and high technology content, and can be produced in batch. Meanwhile, the powder material also can be used for the other spraying technologies (such as a hypersonic flame spraying technology and a detonation spraying technology) to prepare an oxygen sensor coating, an oxygen separation membrane, a fuel battery coating, and the like, and can be used for the fields of aerospace, precise instrument, petroleum and electron, etc.

Description

Technical field [0001] The invention belongs to the technical field of material preparation, and particularly relates to a method for preparing hollow spherical nano-structured yttria-stabilized zirconia powder. Background technique [0002] Yttria-stabilized zirconia ceramic powder material has excellent comprehensive properties such as low thermal conductivity, high thermal expansion coefficient, high temperature phase stability at 1400°C, and corrosion resistance. It is a thermal barrier coating material widely studied and commonly used today. As stabilizer Y in zirconia stabilized by yttria 3+ Valence and Zr 4+ The valences are different. In order to maintain the electric neutrality of the crystal, the ZrO 2 Oxygen vacancies are generated in the High-temperature fuel cell solid electrolyte coatings, high-temperature fuel cell electrode coatings, oxygen-sensitive sensor electrolytes, and oxygen-sensitive sensor electrode coatings prepared with this performance have been studie...

Claims

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Application Information

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IPC IPC(8): C04B35/626C04B35/48
Inventor 戴赫汪礼敏付东兴刘景辉徐景杰林锋董小江
Owner GRIPM ADVANCED MATERIALS CO LTD
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