Regensburg 2010 – scientific programme
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DS: Fachverband Dünne Schichten
DS 12: Invited Schlecht
DS 12.1: Invited Talk
Tuesday, March 23, 2010, 09:30–10:15, H8
Preparation methods and thermoelectric properties of PbTe based nanocomposites containing an inclusion phase — Denis Petri1, Christoph Erk2, •Sabine Schlecht2, Ralf Haßdorf3, Eckhard Müller3, Gert Homm4, Markus Piechotka4, Florian Gather4, and Peter J. Klar4 — 1Freie Universität Berlin, Institut für Chemie und Biochemie, Fabeckstrasse 34-36, 14195 Berlin — 2Justus-Liebig-Universität Gießen, Institut für Anorganische und Analytische Chemie, Heinrich-Buff-Ring 58, 35392 Gießen — 3DLR Köln, Linder Höhe, 51147 Köln — 4Justus-Liebig-Universität Gießen, I.Physikalisches Institut, Heinrich-Buff-Ring 16, 35392 Gießen
With the growing interest of the automotive industies in medium temperature TEGs, lead telluride PbTe and its nanoscale structuring gets in the focus of further material developments. A comparative study on the preparation and the properties of PbTe based nanocomposites will be presented in this contribution. Ball-milling methods were applied for the preparation of different formally ternary and quaternary phases. The thermopower values and the electrical conductivities were evaluated for cold-pressed samples. The changes in the morphologies of the different composites after an annealing step were investigated by SEM and TEM methods. Diffusion processes at the interface of the inclusion and the PbTe matrix seem to play an important role.