Electrode matched with thermoelectric material and connecting method thereof

A thermoelectric material and connection method technology, applied in the field of electrochemistry, can solve the problems of thermoelectric material matching and electrode material difficulty, and achieve the effect of small external resistance, good conductivity and high efficiency

Active Publication Date: 2019-01-29
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art, provide a kind of electrode that matches with thermoelectric material and its connection method, aim at solving the problem that the existing electrode material is difficult to combine with FeNb 0.88 f 0.12 Technical Problems of Sb-Based Thermoelectric Material Matching

Method used

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  • Electrode matched with thermoelectric material and connecting method thereof
  • Electrode matched with thermoelectric material and connecting method thereof
  • Electrode matched with thermoelectric material and connecting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] FeNb 0.88 f 0.12 Preparation of Sb-based thermoelectric material matrix:

[0037] a) FeNb 0.88 f 0.12 The stoichiometric ratio of Sb is measured by each metal source (accurate to 4 decimal places), and the elemental elements required for thermoelectric materials are weighed according to the ratio and put into the sample tank of the suspension melting furnace for suspension melting. Sb is weighed more than 5 on the basis. % mass fraction, the ingot obtained after suspension smelting;

[0038] When the vacuum reaches 10 -3 When the Pa is below, it is filled with argon as a protective gas, and then discharged at a current of 50A to suspend and smelt the sample until the raw materials of each metal source are melted into a liquid state. In order to ensure uniform smelting, each sample was smelted at least 3 times for 5 minutes each time, and the sample was turned over to the other side after each smelting, and then the smelted sample was sealed.

[0039] b) Put the ab...

Embodiment 2

[0044] FeNb 0.88 f 0.12 Connection Technology of Sb-Based Thermoelectric Materials and Silver-Nickel Alloy Electrodes

[0045] a) Electrode material mixed powder: silver powder (200 mesh), nickel powder (200 mesh), wherein the mass percentage of metal element Ag is 90wt%, and the balance is Ni (10wt%);

[0046] b) In a graphite mold with a diameter of 15 mm, the electrode material mixed powder, the FeNb of Example 1 are successively filled 0.88 f 0.12 Sb-based thermoelectric material block, electrode material mixed powder, FeNb was sintered by SPS hot pressing 0.88 f 0.12 The Sb-based thermoelectric material block and the electrode material are sintered together; wherein, the vacuum degree during sintering is 1×10 - 3 MPa, the sintering pressure is 40Mpa, and the sintering temperature is 680°C.

[0047] c) The sample body formed by sintering is polished to remove the surface graphite paper and then cut into the specified length and width of the device by diamond wire cu...

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Abstract

The invention belongs to the field of electrochemical technologies, and specifically relates to an electrode matched with a thermoelectric material and a connecting method thereof. The electrode matched with the thermoelectric material is a silver-nickel alloy, and the thermoelectric material is a FeNb0.88Hf0.12Sb-based thermoelectric material. After the silver-nickel alloy is connected with the FeNb0.88Hf0.12Sb-based thermoelectric material, a metal compound formed at the connection interface after aging remains stable and does not further diffuse to affect the performance of the thermoelectric material. Compared with the existing common Cu electrode material, the silver-nickel alloy does not reduce the performance of the thermoelectric material after the high temperature aging. In addition, the silver-nickel alloy is better in conductivity, so that the additional resistance is smaller, and the efficiency of the device is higher. Therefore, the silver-nickel apply is very suitable forserving as an electrode of the FeNb0.88Hf0.12Sb-based thermoelectric material.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an electrode matched with a thermoelectric material and a connection method thereof. Background technique [0002] Thermoelectric technology realizes the direct conversion of heat energy and electrical energy by means of the Seebeck effect. Different from other energy conversion technologies, the entire conversion process of thermoelectric technology is carried out in solid state, which has the advantages of small size, no pollution, no transmission parts, no noise and high reliability. In view of the above advantages, thermoelectric technology has great application prospects. It can not only be used to recover various low-grade waste heat and waste heat, but also can be used as power supply for military equipment, aerospace vehicles, etc. [0003] Various materials have been studied since the 1950s, including conventional thermoelectric materials: Bi 2 Te ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/08H01L35/10H01L35/34C22C5/06
CPCC22C5/06H10N10/82H10N10/817H10N10/01
Inventor 朱家旭刘福生李均钦敖伟琴张朝华
Owner SHENZHEN UNIV
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