Thermoelectric properties of Zintl compound Ca1-xNaxMg2Bi1.98
Abstract
Motivated by good thermoelectric performance of Bi-based Zintl compounds Ca1-xYbxMg2Biy, we further studied the thermoelectric properties of Zintl compound CaMg2Bi1.98 by doping Na into Ca as Ca1-xNaxMg2Bi1.98 via mechanical alloying and hot pressing. We found that the electrical conductivity, Seebeck coefficient, power factor, and carrier concentration can be effectively adjusted by tuning the Na concentration. Transport measurement and calculations revealed that an optimal doping of 0.5 at.% Na achieved better average ZT and efficiency. The enhancement in thermoelectric performance is attributed to the increased carrier concentration and power factor. Finally, the low cost and nontoxicity of Ca1-xNaxMg2Bi1.98 makes it a potentially promising thermoelectric material for power generation in the mid-temperature range.
- Authors:
-
- Univ. of Houston, Houston, TX (United States). Dept. of Physics and TcSUH
- Univ. of Houston, Houston, TX (United States). Dept. of Physics and TcSUH; Harbin Inst. of Technology, Harbin, Heilongjiang (China). National Key Lab. for Precision Hot Processing of Metals and School of Materials Science and Engineering
- Harbin Inst. of Technology, Harbin, Heilongjiang (China). National Key Lab. for Precision Hot Processing of Metals and School of Materials Science and Engineering
- Publication Date:
- Research Org.:
- Univ. of Houston, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1471077
- Alternate Identifier(s):
- OSTI ID: 1250586
- Grant/Contract Number:
- SC0010831; FG02-13ER46917
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 108; Journal Issue: 18; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION
Citation Formats
Shuai, Jing, Kim, Hee Seok, Liu, Zihang, He, Ran, Sui, Jiehe, and Ren, Zhifeng. Thermoelectric properties of Zintl compound Ca1-xNaxMg2Bi1.98. United States: N. p., 2016.
Web. doi:10.1063/1.4948651.
Shuai, Jing, Kim, Hee Seok, Liu, Zihang, He, Ran, Sui, Jiehe, & Ren, Zhifeng. Thermoelectric properties of Zintl compound Ca1-xNaxMg2Bi1.98. United States. https://doi.org/10.1063/1.4948651
Shuai, Jing, Kim, Hee Seok, Liu, Zihang, He, Ran, Sui, Jiehe, and Ren, Zhifeng. Tue .
"Thermoelectric properties of Zintl compound Ca1-xNaxMg2Bi1.98". United States. https://doi.org/10.1063/1.4948651. https://www.osti.gov/servlets/purl/1471077.
@article{osti_1471077,
title = {Thermoelectric properties of Zintl compound Ca1-xNaxMg2Bi1.98},
author = {Shuai, Jing and Kim, Hee Seok and Liu, Zihang and He, Ran and Sui, Jiehe and Ren, Zhifeng},
abstractNote = {Motivated by good thermoelectric performance of Bi-based Zintl compounds Ca1-xYbxMg2Biy, we further studied the thermoelectric properties of Zintl compound CaMg2Bi1.98 by doping Na into Ca as Ca1-xNaxMg2Bi1.98 via mechanical alloying and hot pressing. We found that the electrical conductivity, Seebeck coefficient, power factor, and carrier concentration can be effectively adjusted by tuning the Na concentration. Transport measurement and calculations revealed that an optimal doping of 0.5 at.% Na achieved better average ZT and efficiency. The enhancement in thermoelectric performance is attributed to the increased carrier concentration and power factor. Finally, the low cost and nontoxicity of Ca1-xNaxMg2Bi1.98 makes it a potentially promising thermoelectric material for power generation in the mid-temperature range.},
doi = {10.1063/1.4948651},
journal = {Applied Physics Letters},
number = 18,
volume = 108,
place = {United States},
year = {Tue May 03 00:00:00 EDT 2016},
month = {Tue May 03 00:00:00 EDT 2016}
}
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