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Rhombohedral-cubic phase transition characterization of (Pb,Ge)Te using high-temperature XRD

Published online by Cambridge University Press:  29 February 2012

J. Sariel ,
I. Dahan  and
Y. Gelbstein
J. Sariel
Affiliation:
Nuclear Research Center, Negev, PO Box 9001, Beer Sheva, Israel, 84190
I. Dahan
Affiliation:
Nuclear Research Center, Negev, PO Box 9001, Beer Sheva, Israel, 84190
Y. Gelbstein
Affiliation:
Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel 84105
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Abstract

Rhombohedral-cubic transformation in Bi2Te3 doped-Pb1−xGexTe alloys is presented. Samples of Bi2Te3 doped Pb1−xGexTe were prepared by powder metallurgy approach. These powder samples were examined by high-temperature X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive spectroscopy. A bulk (pressed powder) cylindrical specimen was used for dilatometery characterizations. According to the XRD examinations it seems that upon increasing the temperatures a continuous transformation occurs from the rhombohedral to the cubic phase, accompanied by the formation of a small amount of the phase Ge0.74Pb3.26Te4.

Keywords

tellurium alloysphase transitiondilatometryHTXRDSEMEDS
Type
X-Ray Diffraction
Information
Powder Diffraction , Volume 23 , Issue 2 , June 2008 , pp. 137 - 140
Copyright
Copyright © Cambridge University Press 2008

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References

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