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Preparation method of integrated BASE component

A technology of alumina and components, applied in the field of preparation of β″ alumina components, to achieve good sealing effect

Inactive Publication Date: 2012-03-21
西安航科等离子体科技有限公司
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  • Application Information

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Problems solved by technology

[0003] In order to solve the technical problems of poor welding quality and poor sealing between the β" alumina tube and the insulating sleeve caused by the existing method for preparing the β" alumina component, the present invention provides a method for preparing an integrated β" alumina component. Better solve the problem of air tightness and stability

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  • Preparation method of integrated BASE component
  • Preparation method of integrated BASE component
  • Preparation method of integrated BASE component

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preparation example Construction

[0023] A method for preparing an integrated β "alumina component, comprising the following steps:

[0024] 1] Wrap the carbon fiber paper 2 on the rod-shaped mold 1 with a smoothness of less than 0.8, and fix the two ends of the carbon fiber paper on the mold; the material of the mold can be graphite, ceramics or refractory metals and their alloys.

[0025] 2] Fix a wire 3 on the carbon fiber paper 2; the wire material can be Mo, Zr, Nb, Hf, Ti, V, Cr, W, Ta, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au or its alloys.

[0026] 3] On the carbon fiber paper 2 fixed with wires in step 2], use a plasma spraying process to spray an electrode material resistant to high temperature and alkali metal corrosion to obtain a porous thin film electrode 4; the electrode material can be Mo, TiN, RhW, TiC, NbN or NbC.

[0027] 4) Connect the insulating sleeve sleeve 5 and the insulating end cap 7 to both ends of the prepared electrode 4 respectively;

[0028] 5] The electrode 4 connected with the insula...

Embodiment 1

[0030] Embodiment 1: Wrap carbon fiber paper 2 with a thickness of 0.15-0.35 mm on a graphite rod with a diameter of 5.5 mm, and fix the carbon fiber paper 2 at both ends of the graphite rod. A molybdenum wire is placed on one end of the carbon fiber paper 2 as a wire 3, and the TiC powder is sprayed on the carbon fiber paper 2 with the molybdenum wire by using a plasma spraying process to obtain a TiC electrode with a thickness of 4.5 μm and a porosity of 36%. layer, which constitutes the electrode 4. an α-Al 2 o 3 The insulating sleeve 5 is butted with one end of the electrode 4, and the molybdenum wire is passed through the α-Al 2 o 3 Connect the wire hole 8 of the insulating end cap 7 to the other end of the electrode 4, and then spray Na-β″-Al on the TiC electrode layer 2 o 3 Powder made of dense Na-β″-Al with a thickness of 0.40mm 2 o 3 layer. At the same time, due to the high temperature of the plasma, Na-β″-Al 2 o 3 Layer 6 and α-Al 2 o 3 Insulating sleeve ...

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Abstract

The invention relates to a preparation method of an integrated beta'' alumina component. The method comprises the following steps: 1) covering a piece of carbon fiber paper on a mould with the finish of less than 0.8, fixing the both ends of the carbon fiber paper; 2) fixing a wire on one end of the carbon fiber paper; 3) adopting the plasma spraying technology to spray high temperature resistant and alkali metal corrosion resistant electrode material and obtain a porous film electrode; 4) separately installing an insulating sleeve socket and an insulating end cover on both ends of the prepared porous film electrode; 5) adopting the plasma spraying technology spray solid electrolyte, fixedly connecting the both ends of the solid electrolyte with the insulating end cover; and 6) pulling out the mould and the carbon fiber paper to obtain the integrated beta'' alumina component. The invention solves the technical problems of the existing preparation method that the welding quality of the beta'' alumina pipe and the insulating sleeve is poor and the sealing property is bad and better solves the problems of tightness and stability.

Description

technical field [0001] The invention relates to a method for preparing an integrated β"alumina component. Background technique [0002] In the Alkali Metal Thermoelectric Converter (AMTEC), electricity is generated by the isothermal expansion of sodium gas inside and outside the B” alumina tube to do work. Once the β” alumina tube leaks, the power generation condition will be lost, and the entire device will fail. Therefore, the connection between the β″ alumina tube and the AMTEC structure must have good airtightness. Since it is necessary to ensure that the β″ alumina tube is insulated from the hot end, the general method is to connect the B” alumina tube to the insulating sleeve first. Welding, then welding with metal, and finally fixed on the hot end of AMTEC. In practice, in order to achieve greater output voltage and conversion efficiency, the β″ alumina tube needs to be made very thin and the diameter of the tube is small, and there must be enough space at the welding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/39F03G7/06
CPCY02E60/12Y02E60/10
Inventor 王浩静刘欢王红飞范立东刘福杰李福平
Owner 西安航科等离子体科技有限公司
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