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Alloy pole for cobalt antimonides-based thermal electrical part and part making method

A technology of alloy electrodes and thermoelectric elements, applied in the manufacture/processing of thermoelectric devices, thermoelectric device parts, and lead wire materials of thermoelectric device nodes, etc., can solve the problem of high electrical and thermal conductivity, high energy consumption, and oxidation resistance problems such as poor performance, to achieve the effects of reducing thermal stress, good reliability, and good bonding interface

Inactive Publication Date: 2008-01-09
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

The disadvantages of Ti as an electrode are relatively high electrical and thermal conductivity, high energy consumption, and poor oxidation resistance

Method used

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  • Alloy pole for cobalt antimonides-based thermal electrical part and part making method
  • Alloy pole for cobalt antimonides-based thermal electrical part and part making method
  • Alloy pole for cobalt antimonides-based thermal electrical part and part making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The copper tungsten electrode is composed of Cu 75 W 25 The thickness is 1mm. The surface is first sandblasted in a sandblasting machine for 2 minutes, and then ultrasonically treated for 10 minutes. Put the copper tungsten electrode into a Φ10 graphite mold, and evenly spread titanium powder with a particle size of 20 μm on the surface of the electrode, and then evenly The cobalt antimonide thermoelectric material is pre-pressed, the pre-pressing pressure is 10MPa, and then SPS sintering is carried out, the vacuum degree is 1Pa, the sintering pressure is 30MPa, the heating rate is 80°C / min, the sintering temperature is 600°C, and then the sintering is completed by holding for 10min.

[0017] The resulting Cu-W electrode / CoSb 3 The block was observed by scanning electron microscopy, and the interface was well bonded, with no cracks (see Figure 3). Electron probe analysis showed that there was no obvious interfacial diffusion between the cobalt antimonide-based thermoel...

Embodiment 2

[0019] The copper tungsten electrode component is Cu 80 W 20 The thickness is 2 mm, and the electrode is treated with the same method and conditions as in Example 1. The copper tungsten electrode is placed in a Φ10 graphite mold, and titanium powder with a particle size of 40 μm is evenly spread on the surface of the electrode, and then antimony is evenly pre-pressed For the cobalt-containing thermoelectric material, the pre-compression pressure is 10MPa, and then SPS sintering is carried out, the vacuum degree is 7Pa, the sintering pressure is 50MPa, the heating rate is 120°C / min, the sintering temperature is 580°C, and then the sintering is completed by holding for 20 minutes.

[0020] The resulting Cu-W electrode / CoSb 3No cracks were found in the block after scanning electron microscope observation, and there was no obvious interface diffusion between the cobalt antimonide-based thermoelectric material and the electrode interface by electron probe analysis, and no obvious ...

Embodiment 3

[0022] Copper Tungsten Electrode Cu 70 W 30 The thickness is 3mm, and the electrode is treated with the same method and conditions as in Example 1. The copper tungsten electrode is placed in a Φ10 graphite mold, and titanium powder with a particle size of 50 μm is evenly spread on the surface of the electrode, and then uniformly pre-pressed. Cobalt antimonide thermoelectric material, pre-compression pressure 10MPa, then SPS sintering, vacuum degree 15Pa, sintering pressure 60MPa, heating rate 150 ℃ / min, sintering temperature 550 ℃, and then hold for 30 minutes to complete sintering.

[0023] The resulting Cu-W electrode / CoSb 3 No cracks were found in the block after scanning electron microscope observation, and there was no obvious interface diffusion between the cobalt antimonide-based thermoelectric material and the electrode interface by electron probe analysis, and no obvious potential transition occurred in the interface potential.

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Abstract

The invention is concerned with the electrode alloy pyroelectricity device of the cobalt antimonide pyroelectricity device and it's making method. It includes the Cu-W alloy electrode with the W quality percentage 20% to 30%; the rest components are copper and unavoidable impurity; the optimized Cu75W25 electrode hot coefficient of expansion (CTE) and the CoSb3 pyroelectricity are in right hot matching with difference no more than 9.8%. The component making applies the transition layer of the metal Ti, granularity about 20-50mum, and the discharge plasma sintering (SPS) method to achieve the connection of the Cu-W alloy electrode and the pyroelectricity. Because of the high conductivity and the thermal conductivity of the copper tungsten alloy and it is matching with the CoSb3 pyroelectricity material rightly, the invention is with the quite stable surface with no obvious composition plane electrode transition, keeps the making method simple.

Description

technical field [0001] The invention relates to an alloy electrode for cobalt antimonide-based thermoelectric elements and a method for preparing the element, more precisely, it relates to electrode materials for cobalt antimonide-based thermoelectric elements and a method for connecting electrodes and thermoelectric materials, which belongs to the preparation of thermoelectric elements technology field. Background technique [0002] Thermoelectric material is a functional material that utilizes the Seebeck effect and Peltier effect to convert heat energy and electric energy into each other. Thermoelectric devices made of thermoelectric materials do not require mechanical moving parts and do not undergo chemical reactions during operation. They have long life and high reliability. With the advantages of no pollution to the environment, with the increasing global environmental pollution and energy crisis, thermoelectric devices are increasingly valued by research in various c...

Claims

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Application Information

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IPC IPC(8): H01L35/20H01L35/08H01L35/34
Inventor 陈立东赵德刚李小亚赵雪盈周燕飞柏胜强夏绪贵
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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