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Electrode and packaging material for skutterudite thermoelectric unicouple component and step method connection technology

A technology of packaging materials and thermoelectric materials, which is applied in the manufacture/processing of thermoelectric devices, thermoelectric devices using only the Peltier or Seebeck effect, etc., which can solve the problems of deteriorating thermoelectric performance, lack of volatile elements, and long cycle.

Active Publication Date: 2014-01-22
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the preparation of protective coatings generally needs to be carried out after the single coupler or device assembly is completed, which not only takes a long time, but also requires high temperature curing and treatment for inorganic or inorganic-organic composite coatings, and the material needs to be heated again. Excessive heating temperature usually causes the loss of volatile elements in the matrix thermoelectric material, which deteriorates its thermoelectric performance

Method used

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  • Electrode and packaging material for skutterudite thermoelectric unicouple component and step method connection technology
  • Electrode and packaging material for skutterudite thermoelectric unicouple component and step method connection technology
  • Electrode and packaging material for skutterudite thermoelectric unicouple component and step method connection technology

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preparation example Construction

[0047] The present invention also provides a novel method for preparing a skutterudite thermoelectric monocouple element. The method has the advantage of realizing the connection between the P / N thermoelectric material and the electrode while connecting the monocouple, and completing the formation of the protective coating. preparation. The method has the characteristics of high production efficiency, high yield and low cost, and is suitable for large-scale production. First, use spark plasma sintering (SPS) or hot-press furnace to densify the P / N-type skutterudite powder material separately to obtain a bulk material, which includes a barrier layer added at the high-temperature end, and then undergoes electroplating or electroless plating Or magnetron sputtering or plasma spraying and other methods to prepare an enhanced bonding layer Ni or Cu layer on the barrier layer, the purpose of this enhanced bonding layer is to more easily realize the brazing welding with the connectin...

Embodiment approach

[0116] A preparation method for connecting an electrode and a packaging material to a thermoelectric monocouple element in one step, the preparation steps of which are as follows:

[0117] Sintering in square or circular molds to obtain P / N skutterudite thermoelectric blocks by spark plasma sintering (SPS) or hot pressing sintering;

[0118] The feature of the skutterudite block is that its high temperature end has a barrier layer and an enhanced bonding layer, the barrier layer includes Ti powder or Ti foil, Mo or TiAl mixed powder and alloy, and the enhanced bonding layer can be Ni foil or Ni powder or Cu Foil or Cu powder, the barrier layer and the enhanced bonding layer can be directly sintered, and can also be used after sintering by plasma spraying, arc spraying, thermal spraying, electroplating, electroless plating, magnetron sputtering, electron beam evaporation and other methods preparation.

[0119] The skutterudite block is cut by wire to obtain blocks of target si...

Embodiment 1

[0150] First, the SPS bulk is sintered

[0151] The Ni foil (0.1mm) 3 of the reinforcing bonding layer, the Ti powder of the barrier layer 2, and the P / N skutterudite powder are put into the mold in turn for SPS sintering to obtain the skutterudite block material.

[0152] Then, cut the P type with a size of 7*4*13mm and the N type with a size of 7*3*13mm by wire cutting, and then perform degreasing treatment, use a detergent to ultrasonic for 10 minutes, and then clean with alcohol for 10 minutes. Then carry out drying treatment, the treatment condition is 80°C, 30min. The connection electrode 5, the solder (solder sheet) 4, and the welding joint surface of the skutterudite block are respectively treated for the purpose of removing the surface oxide layer and roughening it, so as to enhance the welding bonding force. Preferably, use 200# sandpaper for grinding, and then clean the surface.

[0153] Secondly, coating 1 is applied to the side of the high-temperature end (that ...

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Abstract

The invention provides a coating for a thermoelectric unicouple component. The thermoelectric unicouple component comprises a high-temperature end and a low-temperature end; the coating is a glass protection layer, and the high-temperature end of the thermoelectric unicouple component is coated with the coating; and the glass softening temperature of the glass protection layer is close to the electrode welding temperature of the high-temperature end of the thermoelectric unicouple component. The invention further provides the corresponding thermoelectric unicouple component and a preparation method of the thermoelectric unicouple component.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric conversion, and provides a method for preparing a thermoelectric single element, in particular, the electrode and protective coating of the thermoelectric single can be prepared in one step, and belongs to the technical field of thermoelectric conversion. Background technique [0002] Thermoelectric conversion technology refers to the technology that uses Seebeck effect and Peltier effect to realize direct conversion of heat energy and electric energy. Because of its high reliability, no pollution and no mechanical transmission parts, it is widely used in industrial waste heat, It has broad application prospects in fields such as automobile exhaust power generation. The core of thermoelectric conversion technology is thermoelectric materials that can realize direct mutual conversion of thermal energy and electrical energy, and its conversion efficiency is mainly determined by the dimensionl...

Claims

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Application Information

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IPC IPC(8): H01L35/32H01L35/34
Inventor 唐云山董洪亮陈立东李小亚廖锦城
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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