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ZrNiSn-based high-entropy thermoelectric material and preparation method thereof and thermoelectric device

A technology of thermoelectric materials and thermoelectric devices, applied in the field of ZrNiSn-based high-entropy thermoelectric materials and their preparation, and thermoelectric devices, can solve the problems of high thermal conductivity, achieve low lattice thermal conductivity, stable microscopic morphology and physical and chemical properties, and good The effect of corrosion resistance and oxidation resistance

Inactive Publication Date: 2018-05-18
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a ZrNiSn-based high-entropy thermoelectric material and its preparation method, to solve the technical problem of excessively high thermal conductivity of existing thermoelectric materials

Method used

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preparation example Construction

[0025] Correspondingly, on the other hand, the embodiment of the present invention also provides a preparation method of the above-mentioned ZrNiSn-based high-entropy thermoelectric material. This preparation method comprises the steps:

[0026] S01. According to Zr 1-x m x Ni 1-y co y sn 1-z Sb z The stoichiometric ratio of each metal source raw material is weighed, wherein, the x=0.2~0.8, y=0~0.2, z=0~0.3, and the M includes V, Nb, Hf, Ti, Sc, Y, Ta , any 4-5 elements in the Mo element;

[0027] S02. Smelting the weighed metal sources in a protective atmosphere, followed by annealing.

[0028] Specifically, the stoichiometry in the above step S01 may but not only represent the molar ratio. Among them, Zr 1-x m x Ni 1- y co y sn 1-z Sb zy in is preferably 0.05 to 0.2, and z is preferably 0.1 to 0.3. Further, the metal content of M can be controlled by setting the value of x. For example, in one embodiment, the molar content of each element represented by M at ...

Embodiment 1

[0041] This embodiment provides a ZrNiSn-based high-entropy thermoelectric material and a preparation method thereof. The ZrNiSn-based high-entropy thermoelectric material is Zr 0.2 m 0.8 NiSn. M is Sc, Ti, Hf, Nb, and the proportions of the elements represented by M are equal, that is, the molar ratio of Sc, Ti, Hf, and Nb is 1:1:1:1, that is, the ZrNiSn-based high-entropy thermoelectric material is ( sc 0.25 Ti 0.25 Hf 0.25 Nb 0.25 ) 0.8 Zr 0.2 NiSn.

[0042] Its preparation method is as follows:

[0043] S11: according to (Sc 0.25 Ti 0.25 Hf 0.25 Nb 0.25 ) 0.8 Zr 0.2 The stoichiometric ratio of NiSn is to measure each metal source, and it is required to be accurate to 4 decimal places when measuring each metal raw material;

[0044] S12: Mix the weighed elements into the sample tank of the arc melting furnace. When the vacuum degree reaches 10 -3 When the Pa is below, it is filled with protective gas argon, and then discharges at a current of 100A to genera...

Embodiment 2

[0047] This embodiment provides a ZrNiSn-based high-entropy thermoelectric material and a preparation method thereof. The ZrNiSn-based high-entropy thermoelectric material is Zr 0.2 m 0.8 NiSn. M is Sc, V, Hf, Nb, and the proportions of the elements represented by M are equal, that is, the molar ratio of Y, Ti, Hf, and Nb is 1:1:1:1, that is, the ZrNiSn-based high-entropy thermoelectric material is ( sc 0.25 V 0.25 Hf 0.25 Nb 0.25 ) 0.8 Zr 0.2 NiSn.

[0048] Its preparation method is as follows:

[0049] S21: According to (Sc 0.25 V 0.25 Hf 0.25 Nb 0.25 ) 0.8 Zr 0.2 The stoichiometric ratio of NiSn is to measure each metal source, and it is required to be accurate to 4 decimal places when measuring each metal raw material;

[0050] S22: Mix the weighed elements into the sample tank of the high-frequency melting furnace. When the vacuum degree reaches 10 -3 When Pa is lower than Pa, it is filled with protective gas argon, and the current is 100A to gradually in...

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Abstract

The invention discloses a ZrNiSn-based high-entropy thermoelectric material and a preparation method and application thereof. The chemical formula of the ZrNiSn-based high-entropy thermoelectric material is Zr<1>-<x>M<x>Ni<1>-<y>Co<y>Sn<1>-<z>Sb<z>, wherein x=0.2-0.8, y=0-0.2, and z=0-0.3; and M comprises any 4-5 elements of V, Nb, Hf, Ti, Sc, Y, Ta and Mo. The preparation method comprise the steps that all pure metal raw materials are weighed and taken according to the stoichiometric ratio of the elements contained by the ZrNiSn-based high-entropy thermoelectric material, and the steps of smelting treatment, annealing treatment and discharging plasma sintering are conducted. The ZrNiSn-based high-entropy thermoelectric material has the low lattice thermal conductivity; the technological condition of the preparation method of the ZrNiSn-based high-entropy thermoelectric material is easy to control, stability of microstructure and physicochemical properties of the prepared ZrNiSn-basedhigh-entropy thermoelectric material is ensured, the preparation efficiency is high, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric conversion, and in particular relates to a ZrNiSn-based high-entropy thermoelectric material, a preparation method thereof, and a thermoelectric device. Background technique [0002] With the rapid development of economic globalization, coal, oil, natural gas and other non-renewable energy are consumed in large quantities, and energy utilization is becoming more and more tense, and this type of energy has very serious pollution to the environment. At present, researchers are devoting themselves to the development of environmentally friendly new energy sources and how to improve the efficiency of renewable energy use to deal with the current increasingly serious environmental pollution and energy shortage problems. Solid-state thermoelectric conversion technology is an environmentally friendly energy conversion technology that directly converts heat energy to electrical energy and has broad ...

Claims

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Application Information

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IPC IPC(8): C22C30/04C22F1/16C22C1/02
CPCC22C1/02C22C30/04C22F1/16
Inventor 刘福生龚波敖伟琴李均钦张朝华
Owner SHENZHEN UNIV
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