Preparation and thermoelectric properties of Mg2Si fabricated by one-step synthesis method

Yang Li, Shao Ping Chen, Yuan Yuan Jiao, Bo Zeng, Qing Sen Meng, Tang Hong Yi, S. M. Kauzlarich, D. V. Quanch, Z. A. Munir

Research output: Contribution to journalArticle

Abstract

High-purity magnesium hydride(MgH2), silicon(Si) and bismuth(Bi) powders were selected as the raw materials to prepare Bi (1mol%)-doped Mg2Si thermoelectric materials by field-activated and pressure-assisted synthesis(FAPAS) in one step. The synthesis process, phase component and thermoelectric properties were studied, and the results was also compared with that prepared from tube furnace process followed by FAPAS (T+F).The results shows that it's feasible to prepare Mg2Si pellet with high purity, nano-structure and also lower thermal conductivity in short time in one-step method, which improves the figure of merit greatly. Meanwhile, a little bit extra silicon particle was helpful to improve the thermoelectric performance of materials, so the sample with a ratio of 1.95∶1 has higher ZT value than that of 2∶1. At 725 K, ZT value of the former reaches 0.54.

Original languageEnglish (US)
JournalGongneng Cailiao/Journal of Functional Materials
Volume45
Issue number16
DOIs
StatePublished - Aug 30 2014

Fingerprint

Bismuth
preparation
bismuth
purity
synthesis
thermoelectric materials
silicon
Silicon
Silanes
pellets
figure of merit
Powders
Magnesium
hydrides
furnaces
magnesium
Thermal conductivity
Raw materials
Furnaces
thermal conductivity

Keywords

  • FAPAS
  • MgSi
  • MgH
  • One-step synthesis
  • Thermoelectric material

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Preparation and thermoelectric properties of Mg2Si fabricated by one-step synthesis method. / Li, Yang; Chen, Shao Ping; Jiao, Yuan Yuan; Zeng, Bo; Meng, Qing Sen; Yi, Tang Hong; Kauzlarich, S. M.; Quanch, D. V.; Munir, Z. A.

In: Gongneng Cailiao/Journal of Functional Materials, Vol. 45, No. 16, 30.08.2014.

Research output: Contribution to journalArticle

Li, Yang ; Chen, Shao Ping ; Jiao, Yuan Yuan ; Zeng, Bo ; Meng, Qing Sen ; Yi, Tang Hong ; Kauzlarich, S. M. ; Quanch, D. V. ; Munir, Z. A. / Preparation and thermoelectric properties of Mg2Si fabricated by one-step synthesis method. In: Gongneng Cailiao/Journal of Functional Materials. 2014 ; Vol. 45, No. 16.
@article{94d8f5770a984747a49af00df1dcf0cc,
title = "Preparation and thermoelectric properties of Mg2Si fabricated by one-step synthesis method",
abstract = "High-purity magnesium hydride(MgH2), silicon(Si) and bismuth(Bi) powders were selected as the raw materials to prepare Bi (1mol{\%})-doped Mg2Si thermoelectric materials by field-activated and pressure-assisted synthesis(FAPAS) in one step. The synthesis process, phase component and thermoelectric properties were studied, and the results was also compared with that prepared from tube furnace process followed by FAPAS (T+F).The results shows that it's feasible to prepare Mg2Si pellet with high purity, nano-structure and also lower thermal conductivity in short time in one-step method, which improves the figure of merit greatly. Meanwhile, a little bit extra silicon particle was helpful to improve the thermoelectric performance of materials, so the sample with a ratio of 1.95∶1 has higher ZT value than that of 2∶1. At 725 K, ZT value of the former reaches 0.54.",
keywords = "FAPAS, MgSi, MgH, One-step synthesis, Thermoelectric material",
author = "Yang Li and Chen, {Shao Ping} and Jiao, {Yuan Yuan} and Bo Zeng and Meng, {Qing Sen} and Yi, {Tang Hong} and Kauzlarich, {S. M.} and Quanch, {D. V.} and Munir, {Z. A.}",
year = "2014",
month = "8",
day = "30",
doi = "10.3969/j.issn.1001-9731.2014.16.023",
language = "English (US)",
volume = "45",
journal = "Gongneng Cailiao/Journal of Functional Materials",
issn = "1001-9731",
publisher = "Journal of Functional Materials",
number = "16",

}

TY - JOUR

T1 - Preparation and thermoelectric properties of Mg2Si fabricated by one-step synthesis method

AU - Li, Yang

AU - Chen, Shao Ping

AU - Jiao, Yuan Yuan

AU - Zeng, Bo

AU - Meng, Qing Sen

AU - Yi, Tang Hong

AU - Kauzlarich, S. M.

AU - Quanch, D. V.

AU - Munir, Z. A.

PY - 2014/8/30

Y1 - 2014/8/30

N2 - High-purity magnesium hydride(MgH2), silicon(Si) and bismuth(Bi) powders were selected as the raw materials to prepare Bi (1mol%)-doped Mg2Si thermoelectric materials by field-activated and pressure-assisted synthesis(FAPAS) in one step. The synthesis process, phase component and thermoelectric properties were studied, and the results was also compared with that prepared from tube furnace process followed by FAPAS (T+F).The results shows that it's feasible to prepare Mg2Si pellet with high purity, nano-structure and also lower thermal conductivity in short time in one-step method, which improves the figure of merit greatly. Meanwhile, a little bit extra silicon particle was helpful to improve the thermoelectric performance of materials, so the sample with a ratio of 1.95∶1 has higher ZT value than that of 2∶1. At 725 K, ZT value of the former reaches 0.54.

AB - High-purity magnesium hydride(MgH2), silicon(Si) and bismuth(Bi) powders were selected as the raw materials to prepare Bi (1mol%)-doped Mg2Si thermoelectric materials by field-activated and pressure-assisted synthesis(FAPAS) in one step. The synthesis process, phase component and thermoelectric properties were studied, and the results was also compared with that prepared from tube furnace process followed by FAPAS (T+F).The results shows that it's feasible to prepare Mg2Si pellet with high purity, nano-structure and also lower thermal conductivity in short time in one-step method, which improves the figure of merit greatly. Meanwhile, a little bit extra silicon particle was helpful to improve the thermoelectric performance of materials, so the sample with a ratio of 1.95∶1 has higher ZT value than that of 2∶1. At 725 K, ZT value of the former reaches 0.54.

KW - FAPAS

KW - MgSi

KW - MgH

KW - One-step synthesis

KW - Thermoelectric material

UR - http://www.scopus.com/inward/record.url?scp=84910094408&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84910094408&partnerID=8YFLogxK

U2 - 10.3969/j.issn.1001-9731.2014.16.023

DO - 10.3969/j.issn.1001-9731.2014.16.023

M3 - Article

AN - SCOPUS:84910094408

VL - 45

JO - Gongneng Cailiao/Journal of Functional Materials

JF - Gongneng Cailiao/Journal of Functional Materials

SN - 1001-9731

IS - 16

ER -