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Method for connecting skutterudite thermoelectric material and electrode by using high-thermal-stability alloy composite intermediate layer

A technology of composite intermediate layer and thermoelectric material, which is used in the manufacture/processing of thermoelectric devices, thermoelectric device parts, welding equipment, etc. The effect of high thermal stability and simple process control

Active Publication Date: 2021-01-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for connecting skutterudite thermoelectric material and electrode by using high-thermal-stability alloy composite intermediate layer
  • Method for connecting skutterudite thermoelectric material and electrode by using high-thermal-stability alloy composite intermediate layer

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specific Embodiment approach 1

[0019] Specific implementation mode 1: In this implementation mode, the method of connecting skutterudite thermoelectric materials and electrodes with a high thermal stability alloy composite intermediate layer is carried out according to the following steps:

[0020] 1. Clean the surface to be welded of the cobalt ore thermoelectric material and the electrode;

[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...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment differs from Embodiment 1 in that the cleaning process described in Step 1 is as follows: first, 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 electrode described in step 1 is a metal electrode or an alloy electrode;

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

[0032]The material of the alloy electrode 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 relates to a method for connecting a skutterudite thermoelectric material and an electrode by using a high-thermal-stability alloy composite intermediate layer, in particular to the method for connecting the skutterudite thermoelectric material and the electrode. The method aims to solve the problems of poor thermal stability and large contact resistance of a joint obtained by the existing skutterudite thermoelectric material welding method. The method comprises the following steps of 1, cleaning the skutterudite thermoelectric material and the electrode; and 2, preparing the intermediate connecting layer and a diffusion barrier layer by using an electroplating or physical vapor deposition method, and carrying out diffusion welding, wherein the intermediate connecting layer is made of Co, Fe or Ni, and the diffusion barrier layer is made of CoMo, CoW, FeMo or FeW. According to the method, the joint obtained by utilizing the intermediate connecting layer and the diffusionbarrier layer has low contact resistivity, and the thermal stability of the joint is high. The method is suitable for connecting the skutterudite thermoelectric material and the electrode.

Description

technical field [0001] The invention relates to a method for connecting skutterudite thermoelectric materials and electrodes. Background technique [0002] Thermoelectric materials are a class of materials that use the Seebeck effect and the Peltier effect to convert heat energy and electric energy. It has great potential utilization value. In the 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 will significantly reduce the maximum conversion efficiency and output power of thermoelectric devices. Thermoelectric devices are required to work continuously for several to ten years at the service temperature, which poses a high challenge to the thermal stabili...

Claims

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Application Information

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IPC IPC(8): B23K1/008B23K1/20H01L35/34H01L35/08
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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