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High-performance Cu3TmTe3 thermoelectric material and preparation method thereof

A high-performance technology for thermoelectric materials, applied in the field of high-performance Cu3TmTe3 thermoelectric materials and their preparation, can solve the problems of low Seebeck coefficient, high electrical conductivity, high thermal conductivity, etc., achieve simple preparation method, good repeatability, and improve thermoelectric performance Effect

Active Publication Date: 2017-10-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Cu 2 Te compounds have lower ZT values ​​due to lower Seebeck coefficient and higher thermal conductivity at high temperature
Cu 2 The low Seebeck coefficient of the Te compound is mainly due to the existence of two strong covalent bonds, Cu-Cu and Te-Te, in its structure, resulting in high electrical conductivity, low Seebeck coefficient, and Cu 2 The higher thermal conductivity of Te compounds at high temperatures is mainly due to the higher overall thermal conductivity due to the higher carrier concentration, which greatly limits its application in the field of thermoelectric materials.

Method used

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  • High-performance Cu3TmTe3 thermoelectric material and preparation method thereof
  • High-performance Cu3TmTe3 thermoelectric material and preparation method thereof
  • High-performance Cu3TmTe3 thermoelectric material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A high performance Cu 3 TmT 3 Bulk thermoelectric material, its preparation comprises the following steps:

[0050] 1) Melting treatment: take Cu powder, Tm block and Te powder as raw materials, weigh them in a glove box (argon atmosphere) according to a molar ratio of 3:1:3, the total mass of raw materials is about 3g, and then Put the raw materials into the quartz glass tube, vacuum seal the quartz glass tube as soon as possible after taking it out, so that the raw material mixture is in a vacuum atmosphere, then put the quartz glass tube in the melting furnace, raise the temperature to 1150°C within 24 hours and keep it for 48 hours, then The ingot is obtained by cooling in the furnace, and the obtained ingot is ground into a powder in an agate mortar to obtain a single-phase Cu 3 TmT 3 Powder thermoelectric materials;

[0051] 2) Weigh about 1.5g of the obtained Cu 3 TmT 3 Put the powdered thermoelectric material into a Φ10 graphite mold at 10MPa and hold the ...

Embodiment 2

[0058] A high performance Cu 3 TmT 3 Bulk thermoelectric material, its preparation method comprises the following steps:

[0059] 1) Melting treatment: take Cu powder, Tm block and Te powder as raw materials, weigh them in a glove box (argon atmosphere) according to a molar ratio of 3:1:3, the total mass of raw materials is about 3g, and then Put the raw materials into the quartz glass tube, vacuum seal the quartz glass tube as soon as possible after taking it out, so that the raw material mixture is in a vacuum atmosphere, then put the quartz glass tube in the melting furnace, raise the temperature to 1150°C within 24 hours and keep it for 24 hours, then Cooling with the furnace to obtain an ingot, put the obtained ingot into an agate mortar and grind it into powder to obtain a CuTmTe-based powder thermoelectric material;

[0060] 2) Put the CuTmTe-based powder thermoelectric material obtained in step 1) into a Φ10 steel mold for tableting at a pressure of 10 MPa and keep t...

Embodiment 3

[0064] A high performance Cu 3 TmT 3 Bulk thermoelectric material, its preparation comprises the following steps:

[0065] 1) Melting treatment: take Cu powder, Tm block and Te powder as raw materials, weigh them in a glove box (argon atmosphere) according to a molar ratio of 3:1:3, the total mass of raw materials is about 3g, and then Put the raw materials into the quartz glass tube, vacuum seal the quartz glass tube as soon as possible after taking it out, so that the raw material mixture is in a vacuum atmosphere, then put the quartz glass tube in the melting furnace, raise the temperature to 1200°C within 24 hours and keep it for 48 hours, then The ingot is obtained by cooling in the furnace, and the obtained ingot is ground into a powder in an agate mortar to obtain a single-phase Cu 3 TmT 3 Powder thermoelectric materials;

[0066] 2) Weigh about 1.5g of the obtained Cu 3 TmT 3 Put the powdered thermoelectric material into a Φ10 graphite mold at 10MPa and hold the ...

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Abstract

The invention discloses a preparation method of a high-performance Cu3TmTe3 thermoelectric material. Simple substance Tm, simple substance Cu and simple substance Te are used as raw materials; all the raw materials are weighed according to stoichiometric ratios of Cu3TmTe3 for mixing, and then, are molten, cooled and grinded to obtain CuTmTe base powder; the obtained CuTmTe base powder is annealed (or not annealed) and grinded to obtain single-phase Cu3TmTe3 thermoelectric material powder; and the discharge plasma activation sintering is performed to obtain a compact block type high-performance Cu3TmTe3 thermoelectric material. The preparation method combines traditional melting and annealing (or not annealing) processes with the discharge plasma activation sintering technology to develop high-performance Cu3TmTe3 thermoelectric material blocks for the first time; the material is excellent in single-phase performance and thermoelectric performance; and the preparation method is simple, short in preparation time and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, in particular to a high-performance Cu 3 TmT 3 Thermoelectric materials and methods for their preparation. Background technique [0002] Thermoelectric materials can directly convert thermal energy into electrical energy, and can use low-quality heat sources that cannot be used in traditional waste heat power generation to generate electricity. It is applied to the preparation of thermoelectric devices, which have no transmission parts, small size, no noise, no pollution, and good reliability. It has great application prospects in the recycling of automobile waste heat, industrial waste heat power generation, and solar thermal power generation. The low conversion efficiency of existing thermoelectric materials limits the wide application of thermoelectric materials. The conversion efficiency of thermoelectric materials is mainly determined by the dimensionless thermoelectric high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C1/05B22F3/105
CPCB22F3/105C22C1/05C22C30/02
Inventor 唐新峰姚磊李涵
Owner WUHAN UNIV OF TECH
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