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RE3Ta/NbO7 (Rare-Earth Tantalite/Niobate) ceramic powder and preparation method thereof

A technology of ceramic powder and niobate, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., to achieve the effect of short drying time, reducing adverse effects and reducing impurity elements

Inactive Publication Date: 2019-03-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there is no process that can prepare rare earth tantalate ceramic powder that meets the APS process.

Method used

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  • RE3Ta/NbO7 (Rare-Earth Tantalite/Niobate) ceramic powder and preparation method thereof
  • RE3Ta/NbO7 (Rare-Earth Tantalite/Niobate) ceramic powder and preparation method thereof
  • RE3Ta/NbO7 (Rare-Earth Tantalite/Niobate) ceramic powder and preparation method thereof

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preparation example Construction

[0036] Rare earth tantalum niobate (RE 3 Ta / NbO 7) The preparation method of ceramic powder, comprises the following steps:

[0037] Step (1): the rare earth oxide powder (rare earth oxide is Sc 2 o 3 , Y 2 o 3 , La 2 o 3 、Nd 2 o 3 、Sm 2 o 3 、Eu 2 o 3 、Gd 2 o 3 、Dy 2 o 3 、Er 2 o 3 , Yb 2 o 3 、Lu 2 o 3 One or more of them), tantalum pentoxide (Ta 2 o 5 ) powder or niobium pentoxide (Nb 2 o 5 ) powder for pre-drying, the pre-drying temperature is 600-800°C, the pre-drying time is 8-10h, according to RE 3 Ta / NbO 7 The stoichiometric ratio of the corresponding elements weighs the pre-dried powder, and then adds it to deionized water or ethanol solvent to obtain a mixed solution, so that the molar ratio of RE:Ta / Nb in the mixed solution is 3:1, and the mixed solution is mixed with a ball mill. Carry out ball milling, the time of ball milling is not less than 10h, the rotating speed of ball mill is not less than 300 rpm.

[0038] The slurry obtained afte...

Embodiment 2

[0054] The rare earth tantalate (Y) prepared by embodiment 2 2 TaO 7 ) SEM spectrum of ceramic powder such as figure 2 shown, from figure 2 It can be seen that the particle size of the powder is 10-50 μm, and the shape is spherical.

[0055] Enumerate comparative example 3 groups and the ceramic powder that embodiment 1-12 obtains compares:

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Abstract

The invention relates to the technical field of ceramic powder preparation, and specifically discloses RE3Ta / NbO7 (Rare-Earth Tantalite / Niobate) ceramic powder. The preparation method comprises the following steps: carrying out ball milling on RE2O3 powder, Ta2O5 powder or Nb2O5 powder, and carrying out solid-phase reaction, thus obtaining a target phase; mixing the target phase with an organic adhesive, thus forming slurry; drying by adopting a high-temperature spray pyrolysis method, thus obtaining sphere-like powdery particles; sintering, thus obtaining the RE3Ta / NbO7 ceramic powder. A chemical general formula of the RE3Ta / NbO7 ceramic powder is RE3TaO7 / RE3NbO7. A crystal structure of the RE3Ta / NbO7 ceramic powder is an orthorhombic phase, the space group of a crystal lattice is C2221,the particle diameter is 10 to 50 mum, and the RE3Ta / NbO7 ceramic powder is spherical. By adopting the technical scheme disclosed by the invention, the RE3Ta / NbO7 ceramic powder which can meet APS (Atmospheric Plasma Spraying) technical requirements can be obtained.

Description

technical field [0001] The invention relates to the technical field of ceramic powder preparation, in particular to a rare earth tantalum niobate ceramic powder and a preparation method thereof. Background technique [0002] Thermal barrier coating materials are mainly used in the aero-engine industry. They have the advantages of low thermal conductivity, high thermal expansion coefficient, anti-sintering, and good high-temperature stability. They mainly play a role in heat insulation, anti-oxidation, and effective resistance to particle impact to protect high-temperature areas of aero-engines. The role of the component base. [0003] Atmospheric Plasma Spraying (APS) and Electron Beam Physical Vapor Deposition (EBPVD) technologies are commonly used in the industry to prepare thermal barrier coating materials. EBPVD is mostly used to prepare thermal barrier coatings with columnar crystal morphology, while APS technology is mostly used It is suitable for preparing thermal ba...

Claims

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Application Information

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IPC IPC(8): C04B35/626C04B35/50C04B35/495C23C4/10C23C4/134
CPCC23C4/10C23C4/134C04B35/495C04B35/50C04B35/62675C04B2235/5436C04B2235/3251C04B2235/3224C04B2235/3225C04B2235/3227
Inventor 冯晶吴鹏葛振华宋鹏
Owner KUNMING UNIV OF SCI & TECH
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