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Rare earth tantalum/niobate (RETa/NbO4) ceramic powder and preparation method thereof

A technology of ceramic powder and niobate, applied in the field of rare earth tantalum/niobate ceramic powder and its preparation, to achieve the effect of good fluidity and lower water content

Inactive Publication Date: 2019-04-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Rare earth tantalum/niobate (RETa/NbO4) ceramic powder and preparation method thereof
  • Rare earth tantalum/niobate (RETa/NbO4) ceramic powder and preparation method thereof
  • Rare earth tantalum/niobate (RETa/NbO4) ceramic powder and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0052] Rare earth tantalum niobate (RETaO 4 ) The preparation method of ceramic powder, comprises the following steps:

[0053] step 1):

[0054] Rare earth oxide powder Sc 2 o 3 , tantalum pentoxide (Ta 2 o 5 ) powder is pre-dried, the pre-drying temperature is 600°C, and the pre-drying time is 8h; then weigh 6.24g of the pre-dried rare earth oxide powder Sc 2 o 3 , 20g tantalum pentoxide (Ta 2 o 5 ) powder; the powder after pre-drying is joined in ethanol solvent, obtains mixed solution, makes the mol ratio of Sc:Ta in mixed solution be 1:1; Adopt ball mill to carry out ball milling 10h to mixed solution again, the rotating speed of ball mill is 300r / min.

[0055] The slurry obtained after ball milling was dried using a rotary evaporator (model: N-1200B) at a drying temperature of 60°C and a drying time of 2 hours. The dried powder was sieved through a 300-mesh sieve to obtain powder A.

[0056] Step (2):

[0057] The powder A obtained in the step (1) is prepared...

Embodiment 1

[0067] The rare earth tantalate (ScTaO) prepared by embodiment 1 4 ) 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 10-70 μm, and the shape is spherical. And the rare earth tantalum / niobate (RETa / NbO that embodiment 2-12 obtains 4 ) The particle size range of the ceramic powder is 10-70 μm, and they all have a spherical shape.

[0068] 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 preparation of ceramic powder, and discloses rare earth tantalum / niobate (RETa / NbO4) ceramic powder and a preparation method thereof. The chemical general formula of the rare earth tantalum / niobate (RETa / NbO4) ceramic powder is RETa / RENbO4, the crystal structure of the ceramic powder is the orthorhombic phase, the crystal lattice space group is C2221, the particle size is 10-70 microns, and the ceramic powder is spherical. In the preparation process, raw materials are subjected to ball milling, after a high temperature solid phase method is adopted for a reaction the processed raw materials, a solvent and an organic adhesive are mixed to obtain paste C, after centrifugal atomization, dry material particles are obtained, resintering is conducted, and the rare earth tantalum / niobate (RETa / NbO4) ceramic powder meeting the requirements of an APS technology for ceramic powder is obtained.

Description

technical field [0001] The invention belongs to the field of ceramic powder preparation, in particular to a rare earth tantalum / niobate (RETa / NbO 4 ) ceramic powder and its preparation method. Background technique [0002] 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 barrier coatings with lamellar structure, and the coating is compact and has less porosity. However, APS technology has many requirements for the powder, including the powder needs to have a certain density, an appropriate amount of organic binder, the shape of the powder, and a certain particle size distribution, etc., and the particle size distribution is usually in the range of 10~ Within the range of 200μm, the sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/626
CPCC04B35/495C04B35/62655C04B2235/3227C04B2235/3225C04B2235/3224
Inventor 冯晶吴鹏葛振华宋鹏
Owner KUNMING UNIV OF SCI & TECH
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