Scandium-and-cerium-doped zirconium oxide ultrafine powder and preparation method thereof

An ultra-fine powder, zirconia technology, applied in zirconia and other directions, can solve the problems of zirconia powder particle size, specific surface area cannot be effectively controlled, sintering activity is not high, difficult to control and improve sample performance, etc. The effect of large-scale industrial production, simple preparation process and low cost
CN112573570AInactive Publication Date: 2021-03-30FIRST RARE MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FIRST RARE MATERIALS CO LTD
Publication Date
2021-03-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses scandium-and-cerium-doped zirconium oxide ultrafine powder and a preparation method thereof. According to the invention, CTAB is used as a dispersing agent to prepare scandium-and-cerium-doped zirconium oxide ultrafine powder. The preparation method comprises the following steps: firstly, converting a Zr(OH)4 precipitate into monoclinic zirconium oxide by adopting a hydrothermal method to obtain a tetragonal zirconium oxide precursor with enough nucleation core particles; and then conducting calcining to enable tetragonal zirconium oxide crystals to grow into proper particles, thereby preparing the scandium-and-cerium-doped zirconium oxide ultrafine powder with uniform particle size, small particle size and high specific surface area. The preparation method is simple in process and easy for large-scale industrial production.
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Description

technical field

[0001] The invention relates to the field of zirconia nanometer materials, in particular to a scandium-cerium-doped zirconia ultrafine powder and a preparation method thereof. Background technique

[0002] As an important ceramic material, zirconia has excellent physical and chemical properties: high melting point and high boiling point, good thermal conductivity, high high temperature strength and toughness, good corrosion resistance and wear resistance, etc. With the development of science and technology, the application of zirconia as a component of solid fuel cells and solid electrolytes has become one of the current research and development hotspots.

[0003] Under normal pressure, zirconia has three crystal forms: Monoclinic, Tetragonal and Cubic. When the temperature reaches 1170°C, zirconia undergoes a martensitic transformation: by Monoclinic zirconia (m-ZrO 2 ) into metastable tetragonal zirconia (t-ZrO 2 ), when the temperature reaches 2370°C, i...

Claims

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