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  Enhanced power factor and reduced thermal conductivity of a half-Heusler derivative Ti9Ni7Sn8: A bulk nanocomposite thermoelectric material

Misra, D. K., Rajput, A., Bhardwaj, A., Chauhan, N. S., & Singh, S. (2015). Enhanced power factor and reduced thermal conductivity of a half-Heusler derivative Ti9Ni7Sn8: A bulk nanocomposite thermoelectric material. Applied Physics Letters, 106(10): 103901, pp. 1-5. doi:10.1063/1.4914504.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-BF8D-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-D78E-7
Genre: Journal Article

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 Creators:
Misra, D. K.1, Author
Rajput, A.1, Author
Bhardwaj, A.1, Author
Chauhan, N. S.1, Author
Singh, S.2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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 Abstract: We report a half-Heusler (HH) derivative Ti9Ni7Sn8 with VEC = 17.25 to investigate the structural changes for the optimization of high thermoelectric performance. The structural analysis reveals that the resulting material is a nanocomposite of HH and full-Heusler with traces of Ti6Sn5 type-phase. Interestingly, present nanocomposite exhibits a significant decrease in thermal conductivity due to phonon scattering and improvement in the power factor due to combined effect of nanoinclusion-induced electron injection and electron scattering at interfaces, leading to a boost in the ZT value to 0.32 at 773 K, which is 60% higher than its bulk counterpart HH TiNiSn. (C) 2015 AIP Publishing LLC.

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Language(s): eng - English
 Dates: 2015-03-092015-03-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000351397600067
DOI: 10.1063/1.4914504
 Degree: -

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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
 Creator(s):
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 106 (10) Sequence Number: 103901 Start / End Page: 1 - 5 Identifier: Other: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223