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Title: Filling fraction of Yb in CoSb 3 Skutterudite studied by electron microscopy

Abstract

We report the filling fraction limit in filled Skutterudites plays a critical role in thermoelectric properties; however, the exact filling fraction limit for certain fillers is still in debate. In this work, we observed the lattice distortion, where lattice parameters a and b are unequal, in the annealed Yb-filled CoSb 3. Microstructure characterization by advanced spherical aberration-corrected (C S-corrected) electron microscopy, energy-dispersive X-ray spectroscopy, and electron energy loss spectroscopy in conjunction with thermoelectric characterization clearly proves that the Yb filling fraction is higher in the annealed sample (with lattice distortion) than in the ball-milled sample (without lattice distortion). Therefore, the results indicate that lattice distortion appears when the Yb filling fraction reaches a certain critical value in CoSb 3 Skutterudites. Lastly, the observed lattice distortion provides an alternative approach to probe the filling fraction in filled Skutterudites.

Authors:
 [1]; ORCiD logo [2];  [2];  [3];  [2]
  1. University of Houston, TX (United States). Department of Physics and Texas Center for Superconductivity; Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Laboratory for Condensed Matter Physics, Institute of Physics
  2. University of Houston, TX (United States). Department of Physics and Texas Center for Superconductivity
  3. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1466207
Alternate Identifier(s):
OSTI ID: 1361813
Grant/Contract Number:  
SC0001299
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 16; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wang, Yumei, Mao, Jun, Jie, Qing, Ge, Binghui, and Ren, Zhifeng. Filling fraction of Yb in CoSb3 Skutterudite studied by electron microscopy. United States: N. p., 2017. Web. doi:10.1063/1.4979937.
Wang, Yumei, Mao, Jun, Jie, Qing, Ge, Binghui, & Ren, Zhifeng. Filling fraction of Yb in CoSb3 Skutterudite studied by electron microscopy. United States. doi:10.1063/1.4979937.
Wang, Yumei, Mao, Jun, Jie, Qing, Ge, Binghui, and Ren, Zhifeng. Mon . "Filling fraction of Yb in CoSb3 Skutterudite studied by electron microscopy". United States. doi:10.1063/1.4979937. https://www.osti.gov/servlets/purl/1466207.
@article{osti_1466207,
title = {Filling fraction of Yb in CoSb3 Skutterudite studied by electron microscopy},
author = {Wang, Yumei and Mao, Jun and Jie, Qing and Ge, Binghui and Ren, Zhifeng},
abstractNote = {We report the filling fraction limit in filled Skutterudites plays a critical role in thermoelectric properties; however, the exact filling fraction limit for certain fillers is still in debate. In this work, we observed the lattice distortion, where lattice parameters a and b are unequal, in the annealed Yb-filled CoSb3. Microstructure characterization by advanced spherical aberration-corrected (CS-corrected) electron microscopy, energy-dispersive X-ray spectroscopy, and electron energy loss spectroscopy in conjunction with thermoelectric characterization clearly proves that the Yb filling fraction is higher in the annealed sample (with lattice distortion) than in the ball-milled sample (without lattice distortion). Therefore, the results indicate that lattice distortion appears when the Yb filling fraction reaches a certain critical value in CoSb3 Skutterudites. Lastly, the observed lattice distortion provides an alternative approach to probe the filling fraction in filled Skutterudites.},
doi = {10.1063/1.4979937},
journal = {Applied Physics Letters},
number = 16,
volume = 110,
place = {United States},
year = {Mon Apr 17 00:00:00 EDT 2017},
month = {Mon Apr 17 00:00:00 EDT 2017}
}

Journal Article:
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