Dresden 2014 – scientific programme
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DS: Fachverband Dünne Schichten
DS 42: Thermoelectric Materials
DS 42.11: Talk
Thursday, April 3, 2014, 17:45–18:00, CHE 89
Long term stability of Half Heusler compounds at high temperatures — •Julia Krez1,2, Benjamin Balke1, and Claudia Felser1,3 — 1Johannes Gutenberg University Mainz, Mainz, Germany — 2Graduate School of Excellence MAINZ, Mainz, Germany — 3Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
Half-Heusler compounds attracted much attention to be a promising materials for thermoelectric applications in a medium temperature range (470 - 770 K). The recovery of waste heat from e.g. automotive and industrial devices requires not only powerful materials in a particular temperature range but also long term stability regarding to a commercial success. Recent works have shown approaches for an up-scaling of the material synthesis and first constructions for thermoelectric modules with Half-Heusler. This work presents the latest results on a long term stability study of Half-Heusler compounds in a temperature range from room temperature up to 873K. The thermoelectric properties of n- and p-type materials were measured in a cycle test after 50, 100 and 500 cycles.