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A copper sulfide-based thermoelectric composite material and its preparation method

A composite material, copper sulfide technology, applied in copper sulfide, chemical instruments and methods, phosphorus sulfur/selenium/tellurium phosphorus compounds, etc., can solve problems such as poor thermoelectric performance, achieve good thermoelectric performance, improved thermoelectric performance, The effect of increasing the conductivity

Active Publication Date: 2020-06-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention intends to provide a copper sulfide-based thermoelectric composite material and its preparation method to solve the problem of poor thermoelectric performance of existing copper sulfide thermoelectric materials

Method used

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  • A copper sulfide-based thermoelectric composite material and its preparation method
  • A copper sulfide-based thermoelectric composite material and its preparation method
  • A copper sulfide-based thermoelectric composite material and its preparation method

Examples

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preparation example Construction

[0058] A preparation method of copper sulfide-based thermoelectric composite material, comprising the following steps:

[0059] Step (1) powder preparation:

[0060] Weigh CuSn with a purity greater than 99.5% 5 3.65g of alloy powder, 1.00g of elemental S powder with a purity greater than 99.9%, and CuSn 5 Put the alloy powder and elemental S powder into the vacuum ball milling tank, and adjust the speed of the vacuum ball milling tank to 300-450rpm. In this embodiment, the speed of the vacuum ball milling tank is 430rpm. 3h, get Cu 1.75 sn 0.05 S powder; protective atmosphere is 5% H 2 +95%N 2 , the spheres in the ball mill tank are stainless steel spheres, and there are two diameters of the spheres, 6mm and 10mm respectively, the total weight of the spheres with the two diameters is equal, CuSn 5 The weight ratio of the total weight of the alloy powder and the S powder to the weight of the sphere is 1:20-50, and the ratio in this embodiment is 1:20.

[0061] Step (2) ...

Embodiment 2

[0063] The difference between Examples 2-4 and Example 1 lies in that the parameters shown in Table 1 are different, and the thermoelectric composite material finally formed is different through detection. The thermoelectric composite material that embodiment 2 forms is Cu 1.65 sn 0.15 S, the second phase is Cu 4 SnS 4 , and is an orthogonal structure; the thermoelectric composite material formed in Example 3 is Cu 1.5 mn 0.25 Ni 0.05 S, the second phase is MnS, and has a monoclinic structure, and also includes a CuMnNi phase; the thermoelectric composite material formed in Example 4 is Cu 1.5 P 0.3 S, the second phase is CuP 2 , and a monoclinic structure.

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Abstract

The invention belongs to the technical field of thermoelectric materials, and discloses a copper sulfide based thermoelectric composite material and a preparation method thereof. The chemical formulaof the copper sulfide based thermoelectric composite material is Cu<1.8-m>M<m>S, and m is 0.05-0.3. The composite material comprises a matrix phase Cu<1.8>S and a second phase Cu<x>M<y>S<z>. The second phase Cu<x>M<y>S<z> is dispersed in the matrix phase Cu<1.8>S in a form of nano precipitates. The preparation method comprises following steps: ball-milling CuM alloy powder and S simple substance powder to obtain Cu<1.8-m>M<m>S powder; and sintering the Cu<1.8-m>M<m>S powder to obtain the copper sulfide based thermoelectric composite material. The problem that the thermoelectric performance of a conventional copper sulfide thermoelectric material is not good is solved.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric materials, and in particular relates to a copper sulfide-based thermoelectric composite material and a preparation method thereof. Background technique [0002] With the rapid consumption of non-renewable energy and the serious impact of pollutants on the environment, it is imminent to develop new clean energy technologies. In addition to clean energy such as wind energy, tidal energy, and solar energy, there are also huge energy dissipation waste heat in nature and human activities that have not been developed and utilized. New energy materials can make secondary use of excess energy that cannot be fully utilized as primary energy. Thermoelectric materials are new energy functional materials that can directly convert heat and electricity into each other. The thermoelectric performance of thermoelectric materials is characterized by the dimensionless thermoelectric figure of merit ZT, ZT=S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/12C01G19/00C01G53/00C01B25/14
CPCC01B25/14C01G3/12C01G19/006C01G53/006C01P2002/72C01P2004/04C01P2004/80C01P2004/82C01P2006/10C01P2006/32
Inventor 葛振华张益欣冯晶
Owner KUNMING UNIV OF SCI & TECH