Thermoelectric oxides for Transverse Multilayer Thermoelectric Generators

Datum

13.06.2024

Zeit

10:00 - 11:00

Sprecher

Prof. Dr. Jörg Töpfer

Zugehörigkeit

Ernst-Abbe-Hochschule, University of Applied Sciences Jena

Sprache

en

Hauptthema

Materialien

Host

Martina Javorka

Beschreibung

Oxide thermoelectric generators (TEG) are typically fabricated using the standard dual-leg design including manufacturing, arranging and contacting many individual sintered p- and n-type ceramic blocks. Alternatively, the ceramic multilayer technology represents a promising option enabling fabrication of multilayer TEGs. A concept of transverse multilayer thermoelectric generators (TMLTEG) with charge transport perpendicular to the heat flow direction will be presented. Such generators consist of layers of tape-cast p- or n-type thermoelectric oxides in combination with metal layers printed at a certain angle with respect to the heat flow direction to create anisotropic thermoelectric properties. The synthesis, sintering behavior and thermoelectric properties of the individual thermoelectric oxides, as well as the co-firing behavior of metal and oxides is presented. Based on analytical calculations, we have developed the concept of Babin-plots, describing the power output and conversion efficiency for a given material combination as function of the internal and external device geometry. This approach is demonstrated in combination with device simulations for pellet-based and multilayer transverse generators. The fabrication of TMLTEGs using various thermoelectric oxides, e.g., Ca3Co4O9, La2CuO4 and CaMnO3 for low-power applications, is reported.

Links

• Seminars at the IFW

Letztmalig verändert: 13.06.2024, 07:36:46