ZrO2/TiO2/CeO2 doped RE3Ta/NbO7 (Rare-Earth Tantalite/Niobate) ceramic powder and preparation method thereof

A technology of ceramic powder and titanium oxide is applied in the field of rare earth tantalum/niobate ceramic powder and its preparation, and achieves the effects of short drying time, good fluidity and reduced water content

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

AI Technical Summary

Problems solved by technology

[0005] However, there is currently no process that can prepare rare earth-doped tantalum / niobate ceramic powders that meet the APS process.

Method used

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  • ZrO2/TiO2/CeO2 doped RE3Ta/NbO7 (Rare-Earth Tantalite/Niobate) ceramic powder and preparation method thereof
  • ZrO2/TiO2/CeO2 doped RE3Ta/NbO7 (Rare-Earth Tantalite/Niobate) ceramic powder and preparation method thereof
  • ZrO2/TiO2/CeO2 doped RE3Ta/NbO7 (Rare-Earth Tantalite/Niobate) ceramic powder and preparation method thereof

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preparation example Construction

[0038] Zirconia / Titanium Oxide / Ceria Doped Rare Earth Tantalum / Nobate RE 3 Ta / NbO 7 The preparation method of ceramic powder comprises the following steps:

[0039] Step (1): the dopant (zirconia (ZrO 2 ) powder or cerium oxide (CeO 2 ) powder or titanium oxide (TiO 2 ) powder), 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-x (Ta / Nb) 1-x (Zr / Ce / Ti) 2x o 7 The stoichiometric ratio of the corresponding elements weighs the pre-dried powders respectively, and adds them into deionized water or ethanol solvent to obtain a mixed solution, so that the moles of RE:(Ta / Nb):(Zr / Ce / Ti) in the mixed solution The ratio is (3-x):(1-x):2x, and the mix...

Embodiment 2

[0057] The cerium oxide doped rare earth tantalate (Y) prepared by embodiment 2 2.8 Ta 0.8 Ce 0.4 o 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 in the range of 10-50 μm, and it has a spherical shape.

[0058] 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 ZrO2 / TiO2 / CeO2 doped RE3Ta / NbO7 (Rare-Earth Tantalite / Niobate) ceramic powder. The preparation method comprises the following steps: carrying out ball milling on a dopant (ZrO2 / TiO2 / CeO2), 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, thusobtaining the ZrO2 / TiO2 / CeO2 doped RE3Ta / NbO7 ceramic powder. A chemical general formula of the ZrO2 / TiO2 / CeO2 doped RE3Ta / NbO7 ceramic powder is RE(3-x)(Ta / Nb)(1-x)(Zr / Ce / Ti)2xO7, wherein x is greater than 0 and is smaller than 1. A crystal structure of the ZrO2 / TiO2 / CeO2 doped 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 ZrO2 / TiO2 / CeO2 doped RE3Ta / NbO7 ceramic powder is spherical. By adopting the technical scheme disclosed by the invention, the ZrO2 / TiO2 / CeO2 doped RE3Ta / NbO7 ceramic powderwhich 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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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/626C04B35/505C04B35/50
CPCC04B35/50C04B35/505C04B35/62675C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3232C04B2235/3244C04B2235/3251C04B2235/5436
Inventor 冯晶吴鹏葛振华宋鹏
Owner KUNMING UNIV OF SCI & TECH
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