Cu1.8S-based polycrystalline-amorphous metal composite thermoelectric material and preparation method thereof

A technology of amorphous metals and thermoelectric materials, applied in the field of Cu1.8S-based polycrystalline-amorphous metal composite thermoelectric materials and their preparation, can solve the problems of poor thermoelectric performance of thermoelectric materials, achieve improved thermoelectric performance and optimize Seebeck coefficient , Improve the effect of density

Active Publication Date: 2020-06-05
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention intends to provide a Cu 1.8 S-based polycrystalline-amorphous metal composite thermoelectric material and preparation method thereof, to solve the problem of poor thermoelectric performance of existing thermoelectric materials

Method used

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  • Cu1.8S-based polycrystalline-amorphous metal composite thermoelectric material and preparation method thereof
  • Cu1.8S-based polycrystalline-amorphous metal composite thermoelectric material and preparation method thereof
  • Cu1.8S-based polycrystalline-amorphous metal composite thermoelectric material and preparation method thereof

Examples

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preparation example Construction

[0058] a Cu 1.8 The preparation method of S-based polycrystalline-amorphous metal composite thermoelectric material comprises the following steps:

[0059] Step (1) Cu 1.8 S powder preparation:

[0060] Weigh 3.90 g of elemental Cu powder with a purity greater than 99.9% and 1.10 g of elemental S powder with a purity greater than 99.9%, put the elemental Cu powder and S powder into a vacuum ball milling tank, and adjust the speed of the vacuum ball milling tank to 300~ 450rpm, the rotating speed of the vacuum ball mill jar in this embodiment is 425rpm, after ball milling 1~6h, ball milling 3h in this embodiment, obtain Cu 1.8 S powder. During ball milling, the vacuum ball mill tank maintains a protective atmosphere, and the protective atmosphere is that the gas content in the ball mill tank is 5% H 2 +95%N 2 ; The spheres in the ball mill tank are stainless steel spheres, and the diameters of the spheres are 6mm and 10mm. The ratio of the total weight of the spheres with ...

Embodiment 2

[0065] The difference between Examples 2-4 and Example 1 lies in that the parameters shown in Table 1 are different, and it is found that the final composite thermoelectric material is different through testing. The composite thermoelectric material formed in embodiment 2 is Cu 1.8 S+1wt% Fe-Cu-Nb-B, the second phase is Fe-Cu-Nb-B, and has an amorphous structure; the composite thermoelectric material formed in Example 3 is Cu 1.8 S+1wt% Fe-Cr-Mo-B, the second phase is Fe-Cr-Mo-B, and has an amorphous structure; the composite thermoelectric material formed in Example 4 is Cu 1.8 S+0.5wt% Fe-Co-Nb-B, the second phase is Fe-Co-Nb-B, and has an amorphous structure.

Embodiment 5

[0066] The difference between Example 5 and Example 1 is that in step (2), when preparing the mixed powder, 5g Cu 1.8 Put S powder and 0.25g Fe-Co-Nb-B powder into the ball mill jar, and ball mill under protective atmosphere to get the mixed powder Cu 1.8 S+5wt%Fe-Co-Nb-B; protective atmosphere is 5%H2+95%Ar, the rotating speed during ball milling is 600~800rpm, and ball milling time is 5-15min, and in the present embodiment, rotating speed is 800rpm, and ball milling The time is 10 minutes. The composite thermoelectric material formed is Cu 1.8 S+5wt% Fe-Co-Nb-B, the second phase is Fe-Co-Nb-B, and has an amorphous structure.

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Abstract

The invention belongs to the technical field of thermoelectric materials, and discloses a Cu1.8 S-based polycrystalline-amorphous metal composite thermoelectric material. The Cu1.8 S-based polycrystalline-amorphous metal composite thermoelectric material comprises a matrix phase Cu1.8 S and an amorphous second phase M, M is Fe-based amorphous metal, and the amorphous second phase is dispersed anddistributed in the matrix phase Cu1.8 S in the form of a nano precipitate. The preparation method comprises the following steps of carrying out ball milling on the elemental Cu powder and the elemental S powder by using a ball milling tank to obtain the Cu1.8S powder; performing ball milling on the Cu1.8S-based powder and the Fe-based amorphous metal powder to obtain the mixed powder, and sintering the mixed powder to obtain the blocky Cu1.8S-based polycrystalline-amorphous metal composite thermoelectric material. According to the invention, the problem of poor thermoelectric performance of the existing thermoelectric material is solved.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric materials, in particular to a Cu 1.8 An S-based polycrystalline-amorphous metal composite thermoelectric material and a preparation method thereof. Background technique [0002] The current economic and social system relies heavily on various non-renewable fuels, such as oil, coal, natural gas, etc. Their combustion will cause some secondary environmental pollution problems, seriously affecting the development of human beings today and in the future. Therefore, the growing global demand for energy conservation and energy management has sparked interest in novel energy materials with environmental safety. New energy materials can re-use excess energy that cannot be fully utilized by non-renewable energy sources, such as thermoelectric materials. [0003] Thermoelectric materials, also known as thermoelectric materials, are new energy functional materials that can use the transport and inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/16H01L35/22H01L35/34
CPCH10N10/855H10N10/852H10N10/01
Inventor 葛振华
Owner KUNMING UNIV OF SCI & TECH
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