Journal Article

PreJuSER-111941

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Microstructure analyses and thermoelectric properties of Ag1-xPb18Sb1+yTe20

Perlt, S. ; Höche, T. ; Dadda, J. ; Müller, E. ; Bauer Pereira, P.FZJ* ; Hermann, R.FZJ* ; Sarahan, M. ; Pippel, E. ; Brydson, R.

2012
Academic Press Orlando, Fla.

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Please use a persistent id in citations: doi:10.1016/j.jssc.2012.03.064

Abstract: This study reports microstructural investigations of long-term annealed Ag1-xPbmSb1+yTe2+m (m=18, x=y=0, hereinafter referred to as AgPb18SbTe20) (Lead-Antimony-Silver-Tellurium, LAST-18) as well as of Ag1-xPb18Sb1+yTe20, i.e. Ag-deficient and Sb-excess LAST-18 (x not equal 0, y not equal 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-xPb18Sb1+yTe20 and its electronic properties. (C) 2012 Elsevier Inc. All rights reserved.

Keyword(s): J ; LAST (auto) ; Microstructure analysis (auto) ; HRTEM (auto)

Note: 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. Hoche is endepted to Dr. P. Werner granting access to TEM facilities at MPI for Microstructure Physics in Halle.

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Contributing Institute(s):

1. Streumethoden (PGI-4)
2. Streumethoden (JCNS-2)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (FUEK412) (FUEK412)
2. 544 - In-house Research with PNI (POF2-544) (POF2-544)

Appears in the scientific report 2012

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Database coverage:
; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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