Microstructure analyses and thermoelectric properties of Ag 1-xPb 18Sb 1+yTe 20

S. Perlt; Th Höche; J. Dadda; E. Müller; P. Bauer Pereira; R. Hermann; M. Sarahan; E. Pippel; R. Brydson

doi:10.1016/j.jssc.2012.03.064

Microstructure analyses and thermoelectric properties of Ag _1-xPb ₁₈Sb _1+yTe ₂₀

S. Perlt, Th Höche, J. Dadda, E. Müller, P. Bauer Pereira, R. Hermann, M. Sarahan, E. Pippel, R. Brydson

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

20 Scopus citations

Abstract

This study reports microstructural investigations of long-term annealed Ag1 _-x ^PbmSb1 _yTe2 _m (m=18, x=y=0, hereinafter referred to as ^AgPb18SbTe20) (Lead-Antimony-Silver-Tellurium, LAST-18) as well as of Ag1 _-x ^Pb18Sb1 _y ^Te20, i.e. Ag-deficient and Sb-excess LAST-18 (x≠0,y≠0), respectively. Two different length scales are explored. The micrometer scale was evaluated by SEM to analyze the volume fraction and the number of secondary phases as well as the impact of processing parameters on the homogeneity of bulk samples. For ^AgPb18SbTe20, site-specific FIB liftout of TEM lamellae from thermoelectrically characterized samples was accomplished to investigate the structure on the nanometer scale. High-resolution TEM and energy-filtered TEM were performed to reveal shape and size distribution of nanoprecipitates, respectively. A hypothesis concerning the structure-property relationship is set out within the frame of a gradient annealing experiment. This study is completed by results dealing with inhomogeneities on the micrometer scale of Ag1 _-x ^Pb18Sb1 _y ^Te20 and its electronic properties.

Original language	English
Pages (from-to)	58-63
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	193
DOIs	https://doi.org/10.1016/j.jssc.2012.03.064
State	Published - Sep 2012
Externally published	Yes

Funding

The authors would like to thank the BMBF (Contract 03X3540 ) for funding this study. S. Perlt thanks the Leibniz Institute of Surface Modification for financial support enabling research visits at UK facilities. Contributions by B. Schaffer and Q. Ramasse (both SuperSTEM facility Daresbury Laboratories, UK) are gratefully acknowledged. T. Höche is endepted to Dr. P. Werner granting access to TEM facilities at MPI for Microstructure Physics in Halle.

Funders	Funder number
Leibniz Institute of Surface Modification
Bundesministerium für Bildung und Forschung	03X3540

Keywords

HRTEM
LAST
Microstructure analysis

Access to Document

10.1016/j.jssc.2012.03.064

Cite this

@article{9e1cb6c968f443f58f178ba7bf26e3ec,

title = "Microstructure analyses and thermoelectric properties of Ag 1-xPb 18Sb 1+yTe 20 ",

abstract = "This study reports microstructural investigations of long-term annealed Ag1 -x PbmSb1 yTe2 m (m=18, x=y=0, hereinafter referred to as AgPb18SbTe20) (Lead-Antimony-Silver-Tellurium, LAST-18) as well as of Ag1 -x Pb18Sb1 y Te20, i.e. Ag-deficient and Sb-excess LAST-18 (x≠0,y≠0), respectively. Two different length scales are explored. The micrometer scale was evaluated by SEM to analyze the volume fraction and the number of secondary phases as well as the impact of processing parameters on the homogeneity of bulk samples. For AgPb18SbTe20, site-specific FIB liftout of TEM lamellae from thermoelectrically characterized samples was accomplished to investigate the structure on the nanometer scale. High-resolution TEM and energy-filtered TEM were performed to reveal shape and size distribution of nanoprecipitates, respectively. A hypothesis concerning the structure-property relationship is set out within the frame of a gradient annealing experiment. This study is completed by results dealing with inhomogeneities on the micrometer scale of Ag1 -x Pb18Sb1 y Te20 and its electronic properties.",

keywords = "HRTEM, LAST, Microstructure analysis",

author = "S. Perlt and Th H{\"o}che and J. Dadda and E. M{\"u}ller and {Bauer Pereira}, P. and R. Hermann and M. Sarahan and E. Pippel and R. Brydson",

year = "2012",

month = sep,

doi = "10.1016/j.jssc.2012.03.064",

language = "English",

volume = "193",

pages = "58--63",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Elsevier",

}

TY - JOUR

T1 - Microstructure analyses and thermoelectric properties of Ag 1-xPb 18Sb 1+yTe 20

AU - Perlt, S.

AU - Höche, Th

AU - Dadda, J.

AU - Müller, E.

AU - Bauer Pereira, P.

AU - Hermann, R.

AU - Sarahan, M.

AU - Pippel, E.

AU - Brydson, R.

PY - 2012/9

Y1 - 2012/9

N2 - This study reports microstructural investigations of long-term annealed Ag1 -x PbmSb1 yTe2 m (m=18, x=y=0, hereinafter referred to as AgPb18SbTe20) (Lead-Antimony-Silver-Tellurium, LAST-18) as well as of Ag1 -x Pb18Sb1 y Te20, i.e. Ag-deficient and Sb-excess LAST-18 (x≠0,y≠0), respectively. Two different length scales are explored. The micrometer scale was evaluated by SEM to analyze the volume fraction and the number of secondary phases as well as the impact of processing parameters on the homogeneity of bulk samples. For AgPb18SbTe20, site-specific FIB liftout of TEM lamellae from thermoelectrically characterized samples was accomplished to investigate the structure on the nanometer scale. High-resolution TEM and energy-filtered TEM were performed to reveal shape and size distribution of nanoprecipitates, respectively. A hypothesis concerning the structure-property relationship is set out within the frame of a gradient annealing experiment. This study is completed by results dealing with inhomogeneities on the micrometer scale of Ag1 -x Pb18Sb1 y Te20 and its electronic properties.

AB - This study reports microstructural investigations of long-term annealed Ag1 -x PbmSb1 yTe2 m (m=18, x=y=0, hereinafter referred to as AgPb18SbTe20) (Lead-Antimony-Silver-Tellurium, LAST-18) as well as of Ag1 -x Pb18Sb1 y Te20, i.e. Ag-deficient and Sb-excess LAST-18 (x≠0,y≠0), respectively. Two different length scales are explored. The micrometer scale was evaluated by SEM to analyze the volume fraction and the number of secondary phases as well as the impact of processing parameters on the homogeneity of bulk samples. For AgPb18SbTe20, site-specific FIB liftout of TEM lamellae from thermoelectrically characterized samples was accomplished to investigate the structure on the nanometer scale. High-resolution TEM and energy-filtered TEM were performed to reveal shape and size distribution of nanoprecipitates, respectively. A hypothesis concerning the structure-property relationship is set out within the frame of a gradient annealing experiment. This study is completed by results dealing with inhomogeneities on the micrometer scale of Ag1 -x Pb18Sb1 y Te20 and its electronic properties.

KW - HRTEM

KW - LAST

KW - Microstructure analysis

UR - http://www.scopus.com/inward/record.url?scp=84865006484&partnerID=8YFLogxK

U2 - 10.1016/j.jssc.2012.03.064

DO - 10.1016/j.jssc.2012.03.064

M3 - Article

AN - SCOPUS:84865006484

SN - 0022-4596

VL - 193

SP - 58

EP - 63

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

ER -