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 language | English (US) |
|---|---|
| Journal | Gongneng Cailiao/Journal of Functional Materials |
| Volume | 45 |
| Issue number | 16 |
| DOIs | |
| State | Published - Aug 30 2014 |
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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 journal › Article
}
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 -