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Zintl-phase thermoelectric material with hexagonal ZrBeSi structure and preparation method of Zintl-phase thermoelectric material

A technology of phase thermoelectric and thermoelectric devices, applied in the field of Zintl phase thermoelectric materials with hexagonal ZrBeSi structure and its preparation, can solve the problems of high price and low reserves, and achieve high thermoelectric merit value and rich system effect

Pending Publication Date: 2020-04-28
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the constituent elements of these materials, Ge, Te, etc. are expensive and have less reserves

Method used

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  • Zintl-phase thermoelectric material with hexagonal ZrBeSi structure and preparation method of Zintl-phase thermoelectric material
  • Zintl-phase thermoelectric material with hexagonal ZrBeSi structure and preparation method of Zintl-phase thermoelectric material
  • Zintl-phase thermoelectric material with hexagonal ZrBeSi structure and preparation method of Zintl-phase thermoelectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this example, the above preparation method was used to obtain Eu 2 ZnB 2 、Sr 2 ZnSb 2 sample, and for Eu 2 ZnB 2 、Sr 2 ZnSb 2 The samples were characterized by XRD, such as figure 1 It can be seen that single-phase Eu 2 ZnB 2 and Sr 2 ZnSb 2 material, and such a 2 BC 2 Type materials have certain thermoelectric properties.

Embodiment 2

[0043] In this example, EuAgSb, EuCuSb, SrAgSb, BaAgSb, BaCuSb, and CaCuSb samples were respectively obtained by using the above-mentioned preparation method, and XRD and thermoelectric performance tests were carried out on the above-mentioned samples, and the results are as follows image 3 and Figure 4 shown. The results show that the material that can be prepared by this method is a single phase, and the material with the chemical formula DEF has certain thermoelectric properties.

Embodiment 3

[0045] The present embodiment adopts the above-mentioned preparation method to obtain Eu 2 Zn 1-0.5x Ag x Sb 2 sample, and the thermoelectric properties of the sample were tested, the results are as follows Figure 5 shown. The results show that micro-doping does not change the crystal symmetry of the material and can improve the thermoelectric properties of the material.

[0046] In addition, the Eu of the above-mentioned embodiment 2 ZnB 2 、Sr 2 ZnSb 2 , EuAgSb, EuCuSb, SrAgSb, BaAgSb, BaCuSb, CaCuSb, Eu 2 ZnSb 2 Compared with the prior art thermoelectric material SrZn 2 Sb 2 、BaZn 2 Sb 2 、EuZn 2 Sb 2 、EuCd 2 Sb 2 , CaAgSb were compared, the results are shown in Table 2. It can be seen from the comparison of the results in Table 2 that the crystal space group of the Zintl phase thermoelectric material with the ZrBeSi structure of the present embodiment is P6 3 / mmc, with prior art SrZn 2 Sb 2 、BaZn 2 Sb 2 、EuZn 2 Sb 2 、EuCd 2 Sb 2 Although CaAgSb a...

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Abstract

The invention provides a Zintl-phase thermoelectric material with a hexagonal ZrBeSi structure and a preparation method of the Zintl-phase thermoelectric material. The Zintl-phase thermoelectric material has a hexagonal ZrBeSi structure, and the chemical formula of the Zintl-phase thermoelectric material is A2BC2, wherein A is one or a combination of two of elements Eu and Sr, B is an element Zn or a combination of Zn and a first doping element, and C is one or a combination of two of elements Sb and Bi; or the chemical formula of the Zintl-phase thermoelectric material is DEF, wherein D is one or a combination of more than two of elements Eu, Sr, Ba and Ca, B is one or a combination of more than two of elements Cu, Ag or Au, and C is one or a combination of two of elements Sb and Bi. Theinvention discloses a novel thermoelectric material, and the thermoelectric figure of merit of the thermoelectric material is close to the matrix performance of the current mainstream thermoelectric material. In addition, the compound can realize higher thermoelectric figure of merit after doping regulation and control, and has certain potential application value.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric materials, in particular to a Zintl phase thermoelectric material with a hexagonal ZrBeSi structure and a preparation method thereof. Background technique [0002] Thermoelectric conversion technology can realize the direct mutual conversion of heat energy and electric energy, which is one of the key topics of current new energy research. The core of thermoelectric conversion technology is thermoelectric materials. Thermoelectric materials can realize the mutual conversion of heat energy and electric energy. Using this characteristic of thermoelectric materials, waste heat in production and life can be converted into electric energy through temperature difference power generation, which can improve the efficiency of traditional energy use. Energization of thermoelectric materials to achieve solid-state refrigeration. Refrigeration and power generation systems made of thermoelectric materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/18H01L35/34H10N10/853H10N10/01
CPCH10N10/853H10N10/01
Inventor 张倩陈辰曹峰李孝芳张伟明白凤仙
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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