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

D. K. Misra; A. Rajput; A. Bhardwaj; N. S. Chauhan; Sanjay Singh

doi:10.1063/1.4914504

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

D. K. Misra, A. Rajput, A. Bhardwaj, N. S. Chauhan, Sanjay Singh

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

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.

Original language	English
Article number	103901
Journal	Applied Physics Letters
Volume	106
Issue number	10
DOIs	https://doi.org/10.1063/1.4914504
Publication status	Published - 2015 Mar 9
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.4914504

Cite this

@article{6d14aa022c7a4402855c84d419078676,

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

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.",

author = "Misra, {D. K.} and A. Rajput and A. Bhardwaj and Chauhan, {N. S.} and Sanjay Singh",

note = "Publisher Copyright: {\textcopyright} 2015 AIP Publishing LLC.",

year = "2015",

month = mar,

day = "9",

doi = "10.1063/1.4914504",

language = "English",

volume = "106",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "10",

}

TY - JOUR

T1 - Enhanced power factor and reduced thermal conductivity of a half-Heusler derivative Ti9Ni7Sn8

T2 - A bulk nanocomposite thermoelectric material

AU - Misra, D. K.

AU - Rajput, A.

AU - Bhardwaj, A.

AU - Chauhan, N. S.

AU - Singh, Sanjay

PY - 2015/3/9

Y1 - 2015/3/9

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84924663250&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84924663250&partnerID=8YFLogxK

U2 - 10.1063/1.4914504

DO - 10.1063/1.4914504

M3 - Article

AN - SCOPUS:84924663250

SN - 0003-6951

VL - 106

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 10

M1 - 103901

ER -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this