Alloy electrode suitable for Cu<2>SnSe<3>-based thermoelectric element and preparation technology of thermoelectric element

A technology of alloy electrode and preparation process, which is applied in the manufacture/processing of thermoelectric devices, parts and components of thermoelectric devices, etc. It can solve the problems of inapplicable electrodes and connection technology, large heat loss and electrical loss, and affecting the performance of thermoelectric elements, etc., to achieve The effect of easy control of process parameters, good connection and high reliability

Active Publication Date: 2016-06-15
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the patent document JP11274580, the PbTe thermoelectric material uses Cu electrodes. In the patent document ZL200710037778.X, the skutterudite uses the spark plasma sintering technology (SPS) to prepare the Mo-Cu alloy as the electrode of the skutterudite thermoelectric element, and The thermoelectric element contains an intermediate transition layer Ti layer. The more interfaces, the greater the heat loss and electrical loss, which seriously affects the performance of the thermoelectric element.
[0004] Cu 2 SnSe 3 Based thermoelectric materials have good thermoelectric properties due to their special diamond-like structure, and a

Method used

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  • Alloy electrode suitable for Cu&lt;2&gt;SnSe&lt;3&gt;-based thermoelectric element and preparation technology of thermoelectric element
  • Alloy electrode suitable for Cu&lt;2&gt;SnSe&lt;3&gt;-based thermoelectric element and preparation technology of thermoelectric element
  • Alloy electrode suitable for Cu&lt;2&gt;SnSe&lt;3&gt;-based thermoelectric element and preparation technology of thermoelectric element

Examples

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Example Embodiment

[0031] Example 1

[0032] Cu 2 SnSe 3 Based thermoelectric element, the alloy electrode is Ti-Ni alloy (containing Ni15%, Ti85%), the preparation method is as follows:

[0033] Select the electrode sheet with a thickness of 0.2mm Ti-Ni alloy to perform sandblasting treatment to make the surface roughness Ra of both sides approximately 1.0-2.0μm, then put it in alcohol for ultrasonic treatment for 10 minutes, and dry the Ti-Ni alloy The electrode sheet is placed in a graphite mold; the surface of the electrode is evenly spread with a particle size of 400-500 mesh Cu 2 SnSe 3 Powder, of which Cu 2 SnSe 3 The powder is prepared by ball milling in an argon atmosphere, the ball-to-battery ratio is 12:1, the rotating speed is 300 rpm, and the ball milling time is 24 hours (1 hour for each forward ball mill, 15 minutes of stopping interval, and then reverse Ball milling for 1 hour, stopping at 15 minutes interval, cyclically, the total ball milling time is 24 hours); then, Cu is prepared ...

Example Embodiment

[0035] Example 2

[0036] Cu 2 SnSe 3 Based thermoelectric element, the alloy electrode is Ti-Ni alloy (containing Ni18%, Ti82%), the preparation method is as follows:

[0037] Select a Ti-Ni alloy electrode sheet with a thickness of 2mm to perform sandblasting treatment to make the surface roughness Ra on both sides approximately 1.0-2.0μm, and then put it in alcohol for ultrasonic treatment for 10 minutes, and dry the Ti-Ni alloy The electrode sheet is placed in a graphite mold; the surface of the electrode is evenly spread with a particle size of 400-500 mesh Cu 2 SnSe 3 Powder, of which Cu 2 SnSe 3 The powder is prepared by planetary ball milling under the protection of argon gas. The ball-to-battery ratio is 12:1, the rotating speed is 300 rpm, and the ball milling time is 24 hours (the ball milling method is the same as in Example 1); then it is used under vacuum Preparation of Cu by rapid hot pressing sintering 2 SnSe 3 Based on thermoelectric elements, the sintering tempera...

Example Embodiment

[0039] Example 3

[0040] Cu 2 SnSe 3 Based thermoelectric element, the alloy electrode is Ti-Ni alloy (containing Ni15%, Ti85%), the preparation method is as follows:

[0041] Select a Ti-Ni alloy electrode sheet (containing 15% Ni) with a thickness of 1.0mm, and the treatment process is the same as that in Example 1. Place it in a graphite mold, and spread 400-500 mesh Cu uniformly on the electrode surface 2 SnSe 3 Powder, of which Cu 2 SnSe 3 The preparation process of the powder is the same as in Example 1, and then the Cu is prepared by rapid hot pressing sintering under vacuum conditions 2 SnSe 3 Based on thermoelectric elements, the sintering temperature for rapid hot press sintering is 550°C, the sintering pressure is 55MPa, the pressure is applied at 350°C, the vacuum degree is 5Pa, the heating rate is 90°C / min, and the heat preservation time is 15min.

[0042] Ti-Ni electrode / Cu obtained 2 SnSe 3 The thermoelectric element is observed by scanning electron microscope, the int...

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Abstract

The invention relates to an alloy electrode matched with a p-type Cu<2>SnSe<3>-based thermoelectric material and a preparation technology of a Cu<2>SnSe<3>-based thermoelectric element. The alloy electrode is a Ti-Ni alloy, and has high electric conductivity and thermal conductivity. The Ti-Ni alloy provided by the invention has a coefficient of thermal expansion, which is very similar to that of the Cu<2>SnSe<3>-based thermoelectric material. According to preparation of the Cu<2>SnSe<3>-based thermoelectric element, the Cu<2>SnSe<3>-based thermoelectric element is formed by directly sintering the Cu<2>SnSe<3>-based thermoelectric material on the Ti-Ni alloy electrode by an (RHPS) technology; and an intermediate transition connection layer is not needed. The sintered electrode interface bonding is very stable; and the Cu<2>SnSe<3>/electrode interface is free of obvious resistance transition. The preparation technology is simple, is very suitable for preparation of the Cu<2>SnSe<3>-based thermoelectric element and can be applied to large-scale production and preparation.

Description

Technical field [0001] The invention belongs to the field of thermoelectric components and their preparation, and particularly relates to 2 SnSe 3 Alloy electrode of base thermoelectric element and suitable for Cu 2 SnSe 3 Preparation process of base thermoelectric element. Background technique [0002] Thermoelectric material is a kind of energy material that can mutually convert heat energy and electric energy. It uses its Seebeck effect to directly convert heat energy into electric energy. Thermoelectric power generation components made of thermoelectric materials do not need mechanical moving parts when working, and they also have a long life. It has the advantages of long, high reliability and no pollution to the environment. It has great potential in the field of aerospace, industrial waste heat recovery and geothermal utilization. In the modern society with increasingly tight energy, the research and development of thermoelectric power generation components has been achieve...

Claims

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Application Information

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IPC IPC(8): H01L35/04H01L35/34
CPCH10N10/81H10N10/01
Inventor 赵德刚宁纪爱左敏王振卿
Owner UNIV OF JINAN
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