Back to Search
Start Over
Thermoelectric properties of Zintl compound Ca1−xNaxMg2Bi1.98
- Source :
- Applied Physics Letters. 108:183901
- Publication Year :
- 2016
- Publisher :
- AIP Publishing, 2016.
-
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. The low cost and nontoxicity of Ca1−xNaxMg2Bi1.98 makes it a potentially promising thermoelectric material for power generation in the mid-temperature range.
- Subjects :
- Materials science
Physics and Astronomy (miscellaneous)
business.industry
Doping
Metallurgy
02 engineering and technology
Power factor
010402 general chemistry
021001 nanoscience & nanotechnology
Hot pressing
Thermoelectric materials
01 natural sciences
0104 chemical sciences
Electricity generation
Electrical resistivity and conductivity
Seebeck coefficient
Thermoelectric effect
Optoelectronics
0210 nano-technology
business
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 108
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........10a6fcfa36c60bbdcb103b251ad98adb