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A method for connecting skutterudite thermoelectric materials and electrodes using a high thermal stability alloy composite interlayer

A composite intermediate layer and thermoelectric material technology, which is applied in the manufacture/processing of thermoelectric devices, thermoelectric device parts, welding equipment, etc., can solve the problems of poor thermal stability of connection joints and large contact resistance, and achieve low contact resistivity, The effect of high thermal stability and simple process control

Active Publication Date: 2022-06-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of poor thermal stability and large contact resistance of joints obtained by the existing welding method of skutterudite thermoelectric materials, and proposes a method for connecting skutterudite thermoelectric materials and electrodes by using a high thermal stability alloy composite intermediate layer

Method used

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  • A method for connecting skutterudite thermoelectric materials and electrodes using a high thermal stability alloy composite interlayer
  • A method for connecting skutterudite thermoelectric materials and electrodes using a high thermal stability alloy composite interlayer

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specific Embodiment approach 1

[0019] Embodiment 1: In this embodiment, the method for connecting the skutterudite thermoelectric material and the electrode using the high thermal stability alloy composite intermediate layer is carried out according to the following steps:

[0020] 1. Clean the surfaces to be welded of the cobalt ore thermoelectric materials and electrodes;

[0021] 2. Use electroplating or physical vapor deposition to prepare an intermediate connecting layer on the surface of the electrode, and prepare a diffusion barrier layer on the surface of the intermediate connecting layer; or prepare an intermediate connecting layer on the surface of the electrode, and prepare a diffusion barrier layer on the surface of the skutterudite thermoelectric material Or prepare a diffusion barrier layer on the surface of the skutterudite thermoelectric material, and prepare an intermediate connection layer on the surface of the diffusion barrier layer; then stack the obtained electrode and the skutterudite ...

specific Embodiment approach 2

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the cleaning process in step 1 is: firstly rinse with absolute ethanol, then place in acetone for ultrasonic cleaning for 5-30 minutes, and finally air dry.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the electrodes in step 1 are metal electrodes or alloy electrodes;

[0031] The metal electrode material is Cu, Ni, Fe, Co or Cr;

[0032]The alloy electrode material is Cu-based alloy, Ni-based alloy, Fe-based alloy, Co-based alloy or Cr-based alloy;

[0033] The Cu-based alloy is CuW or CuMo; the Ni-based alloy is NiW, NiMo or NiCr; the Fe-based alloy is FeW, FeMo, FeCr or FeCoNi; the Co-based alloy is CoW, CoMo, CoCr, CoNi or CoFe; the Cr-based alloy is CrW, CrMo, CrCoNi or CrFeNi.

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Abstract

The invention discloses a method for connecting a skutterudite thermoelectric material and an electrode by using a high-thermal-stable alloy composite intermediate layer, and relates to a method for connecting the skutterudite thermoelectric material and an electrode. The purpose of the method is to solve the problems of poor thermal stability and large contact resistance of the joints obtained by the existing skutterudite thermoelectric material welding method. Method: 1. Cleaning the skutterudite thermoelectric material and electrodes; 2. Using electroplating or physical vapor deposition to prepare the intermediate connection layer and the diffusion barrier layer, and perform diffusion welding; the material of the intermediate connection layer is Co, Fe or Ni; the diffusion barrier layer The material is CoMo, CoW, FeMo or FeW. The joint obtained by using the intermediate connection layer and the diffusion barrier layer in the invention has low contact resistivity and high thermal stability of the joint. The invention is suitable for connecting skutterudite thermoelectric materials and electrodes.

Description

technical field [0001] The present invention relates to a method for connecting skutterudite thermoelectric material and electrodes. Background technique [0002] Thermoelectric materials are a class of materials that use the Seebeck effect and the Peltier effect for the mutual conversion of thermal energy and electrical energy. It has great potential utilization value. In practical application of bulk thermoelectric materials, it is necessary to connect P-type thermoelectric materials and N-type thermoelectric materials with electrode materials to form thermoelectric pairs, and then use several thermoelectric pairs to form thermoelectric devices with a certain power. The contact resistance between thermoelectric materials and electrodes can significantly reduce the maximum conversion efficiency and output power of thermoelectric devices. Thermoelectric devices are required to work continuously for several years to more than ten years at the service temperature, which pose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20H01L35/34H01L35/08H10N10/01H10N10/817
CPCB23K1/008B23K1/20B23K1/206H10N10/817H10N10/01
Inventor 张丽霞任伟耿慧远张嘉伦孙湛冯吉才
Owner HARBIN INST OF TECH
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