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Schönauer-Kamin, Daniela ; Bresch, Sophie ; Paulus, Daniel ; Moos, Ralf:
Powder-Aerosol deposited (PAD) calcium cobaltite as textured p-type thermoelectric material.
2023
Veranstaltung: 98. DKG-Jahrestagung
, 27.03.-30.03.2023
, Jena.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Vortrag
)
Abstract
Oxide thermoelectric semiconducting materials like p-type calcium cobaltite Ca3Co4O9 are investigated as oxidation- and temperatureresistant thermoelectric materials for thermoelectric generators (TEGs). To realize TEGs in planar film technology, the powder aerosol deposition (PAD) method is emerging recently. PAD is a method to obtain dense ceramic films directly from the synthesized starting powders without a subsequent high-temperature step. In the present work, Ca3Co4O9 (CCO) powders are processed by PAD to ceramic films at room temperature. The thermoelectric properties of the films (film thickness 10 – 20 μm) are characterized from room temperature to 900°C. Additionally, the layer morphology and texture of the films will be investigated. As result, the Seebeck coefficient of the CCO-PAD film is very close to pressed and sintered CCO-bulk materials during the 1st heating cycle to 900°C. The morphology of the films after the thermal treatment shows strongly aligned crystallites resulting in a strong texture of the films. The electrical conductivity increases strongly during the 1st heating cycle to 900°C and remains almost constant afterwards. Compared to CCO-bulk materials, the films provide higher electrical conductivity which could be explained by the oriented crystal growth in-plane direction of the film. The relationship between thermoelectric properties and layer morphology as a function of thermal annealing parameters will be further investigated.
Weitere Angaben
| Publikationsform: | Veranstaltungsbeitrag (Vortrag) |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos Profilfelder > Advanced Fields > Neue Materialien Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 11 Apr 2023 05:59 |
| Letzte Änderung: | 11 Apr 2023 05:59 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/75849 |