Synergistically improving thermoelectric and mechanical properties of Ge0.94Bi0.06Te through dispersing nano-SiC

Yang Jin; Xiaoxuan Zhang; Yu Xiao; Wenke He; Dongyang Wang; Juan Li; Shuqi Zheng; Dudi Ren; Yuting Qiu; Li Dong Zhao

doi:10.1016/j.scriptamat.2020.03.018

Synergistically improving thermoelectric and mechanical properties of Ge_0.94Bi_0.06Te through dispersing nano-SiC

Yang Jin
, Xiaoxuan Zhang
, Yu Xiao
, Wenke He
, Dongyang Wang
, Juan Li
, Shuqi Zheng
, Dudi Ren
, Yuting Qiu^*
, Li Dong Zhao

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University
China University of Petroleum - Beijing
CAS - Shanghai Institute of Ceramics

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

In this paper, Ge_0.94Bi_0.06Te was firstly fabricated by mechanical alloying. Compared with the Ge_0.94Bi_0.06Te sample prepared by the melting process, the maximum ZT achieved an improvement from 1.4 to 1.8. The thermoelectric performance of Ge_0.94Bi_0.06Te can be improved through suppressing Ge vacancies and refining grains via mechanical alloying. Further introducing nano-SiC into the matrix of Ge_0.94Bi_0.06Te improves thermoelectric performance by increasing Seebeck coefficient and reducing thermal conductivity. Meanwhile, the mechanical properties including the microhardness and Young's modulus are also enhanced by dispersing nano-SiC. Consequently, a maximum ZT ~ 2.1 at 723 K was achieved in GeTe-based materials.

Original language	English
Pages (from-to)	22-27
Number of pages	6
Journal	Scripta Materialia
Volume	183
DOIs	https://doi.org/10.1016/j.scriptamat.2020.03.018
State	Published - 1 Jul 2020

Keywords

GeTe
Mechanical alloying
Mechanical properties
Nano-SiC
Thermoelectric

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10.1016/j.scriptamat.2020.03.018

Cite this

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title = "Synergistically improving thermoelectric and mechanical properties of Ge0.94Bi0.06Te through dispersing nano-SiC",

abstract = "In this paper, Ge0.94Bi0.06Te was firstly fabricated by mechanical alloying. Compared with the Ge0.94Bi0.06Te sample prepared by the melting process, the maximum ZT achieved an improvement from 1.4 to 1.8. The thermoelectric performance of Ge0.94Bi0.06Te can be improved through suppressing Ge vacancies and refining grains via mechanical alloying. Further introducing nano-SiC into the matrix of Ge0.94Bi0.06Te improves thermoelectric performance by increasing Seebeck coefficient and reducing thermal conductivity. Meanwhile, the mechanical properties including the microhardness and Young's modulus are also enhanced by dispersing nano-SiC. Consequently, a maximum ZT \textasciitilde{} 2.1 at 723 K was achieved in GeTe-based materials.",

keywords = "GeTe, Mechanical alloying, Mechanical properties, Nano-SiC, Thermoelectric",

author = "Yang Jin and Xiaoxuan Zhang and Yu Xiao and Wenke He and Dongyang Wang and Juan Li and Shuqi Zheng and Dudi Ren and Yuting Qiu and Zhao, \{Li Dong\}",

note = "Publisher Copyright: {\textcopyright} 2020 Acta Materialia Inc.",

year = "2020",

month = jul,

day = "1",

doi = "10.1016/j.scriptamat.2020.03.018",

language = "英语",

volume = "183",

pages = "22--27",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Synergistically improving thermoelectric and mechanical properties of Ge0.94Bi0.06Te through dispersing nano-SiC

AU - Jin, Yang

AU - Zhang, Xiaoxuan

AU - Xiao, Yu

AU - He, Wenke

AU - Wang, Dongyang

AU - Li, Juan

AU - Zheng, Shuqi

AU - Ren, Dudi

AU - Qiu, Yuting

AU - Zhao, Li Dong

PY - 2020/7/1

Y1 - 2020/7/1

N2 - In this paper, Ge0.94Bi0.06Te was firstly fabricated by mechanical alloying. Compared with the Ge0.94Bi0.06Te sample prepared by the melting process, the maximum ZT achieved an improvement from 1.4 to 1.8. The thermoelectric performance of Ge0.94Bi0.06Te can be improved through suppressing Ge vacancies and refining grains via mechanical alloying. Further introducing nano-SiC into the matrix of Ge0.94Bi0.06Te improves thermoelectric performance by increasing Seebeck coefficient and reducing thermal conductivity. Meanwhile, the mechanical properties including the microhardness and Young's modulus are also enhanced by dispersing nano-SiC. Consequently, a maximum ZT ~ 2.1 at 723 K was achieved in GeTe-based materials.

AB - In this paper, Ge0.94Bi0.06Te was firstly fabricated by mechanical alloying. Compared with the Ge0.94Bi0.06Te sample prepared by the melting process, the maximum ZT achieved an improvement from 1.4 to 1.8. The thermoelectric performance of Ge0.94Bi0.06Te can be improved through suppressing Ge vacancies and refining grains via mechanical alloying. Further introducing nano-SiC into the matrix of Ge0.94Bi0.06Te improves thermoelectric performance by increasing Seebeck coefficient and reducing thermal conductivity. Meanwhile, the mechanical properties including the microhardness and Young's modulus are also enhanced by dispersing nano-SiC. Consequently, a maximum ZT ~ 2.1 at 723 K was achieved in GeTe-based materials.

KW - GeTe

KW - Mechanical alloying

KW - Mechanical properties

KW - Nano-SiC

KW - Thermoelectric

UR - https://www.scopus.com/pages/publications/85082116924

U2 - 10.1016/j.scriptamat.2020.03.018

DO - 10.1016/j.scriptamat.2020.03.018

M3 - 文章

AN - SCOPUS:85082116924

SN - 1359-6462

VL - 183

SP - 22

EP - 27

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Synergistically improving thermoelectric and mechanical properties of Ge_0.94Bi_0.06Te through dispersing nano-SiC

Abstract

Keywords

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