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HomeKey Engineering MaterialsKey Engineering Materials Vols. 675-676Investigating Power Factor of CaMnO3 Added Carbon...

Investigating Power Factor of CaMnO₃ Added Carbon Nanotubes

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Abstract:

CaMnO₃ (CMO) thermoelectric material is large Seebeck coefficient but high electrical resistivity. To reduce electrical resistivity by adding carbon nanotubes (CNTs) in CMO material and may be decreased Seebeck coefficient. In this work, we simulated electronic structure of CMO and CNTs-added CMO by DV-Xα method to investigation of power factor and enhance the thermoelectric performance. The Seebeck coefficient and electrical resistivity were calculated by Maxwell-Boltzmann distribution and Mott’s law to investigate power factor. The DV-Xa calculated show the energy level and density of state (DOS) of CMO and CNTs-added CMO demonstrated that the energy gap reduces from 3.33 eV to 0.19 eV affect to enhance the power factor of CMO with Seebeck coefficient and electrical resistivity are decreases. The power factor of CNTs-added CMO was increased with increasing CNTs content.

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Applied Physics and Material Applications II

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Periodical:

Key Engineering Materials (Volumes 675-676)

Pages:

171-174

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.675-676.171

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Online since:

January 2016

Authors:

Meena Rittiruam, Arthorn Vora-Ud, Tosawat Seetawan*

Keywords:

Dv−Xα, Electrical Resistivity, Enhance Thermoelectric, Seebeck Coefficient, Thermoelectric Performance

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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