Berlin 2015 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 17: Postersession I
MM 17.28: Poster
Monday, March 16, 2015, 18:00–20:00, Poster E
Microstructure and electrical characterization of commercial Na-β-Alumina — •Wolfram Münchgesang1, Torsten Schucknecht2, Barbara Abendroth1, Tilmann Leisegang1,3, David Rafaja2, and Dirk C. Meyer1 — 1TU Bergakademie Freiberg, Institut für Experimentelle Physik, Freiberg, Germany — 2TU Bergakademie Freiberg, Institut für Werkstoffwissenschaft, Freiberg, Germany — 3Fraunhofer-Technologiezentrum Halbleitermaterialien THM, Freiberg, Germany
Na-β-Alumina (NaBA) is a well-known and commercially available solid electrolyte (SE) for high-temperature Na-S-accumulators (NSA). Under conditions of standard working temperatures of around 300 ∘C NaBA is stable, electrically insulating and ion-conducting.
These properties make NaBA also interesting for low-temperature NSA, as an alternative separator and as a reference for SE. The challenge for the transfer from a high- to a low-temperature working SE is to compensate the strong decreased ion-conductance by a decreased thickness, without reducing its stability and insulating properties. In this regard, the microstructure of NaBA and its influence on the conductivity has to be worked out and controlled during preparation.
We will present and discus results on multiscale investigation of commercial NaBA exhibiting a complex defect structure. This involves the analysis of the chemical and phase distribution as well as the microstructure and their influence on the conductivity.
This work was financed by der Federal Ministry for Economic Affairs and Energy within the project BaSta (0325563D).