Powder aerosol deposited calcium cobaltite as textured P-type thermoelectric material with power factors approaching single crystal values

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00008218
URN to cite this document: urn:nbn:de:bvb:703-epub-8218-3

Title data

Paulus, Daniel ; Bresch, Sophie ; Moos, Ralf ; Schönauer-Kamin, Daniela:
Powder aerosol deposited calcium cobaltite as textured P-type thermoelectric material with power factors approaching single crystal values.
In: Journal of the European Ceramic Society. Vol. 44 (2024) Issue 15 . - 116717.
ISSN 0955-2219
DOI der Verlagsversion: https://doi.org/10.1016/j.jeurceramsoc.2024.116717

	Format: PDF Name: 1-s2.0-S0955221924005909-main.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Abstract

In this work, the thermoelectric material calcium cobaltite Ca3Co4O9 (CCO), a promising p-type conducting thermoelectric oxide with anisotropic properties, was processed by the powder aerosol deposition method (PAD) to form a dense ceramic CCO film with a thickness in the µm range. The prepared films were characterized regarding their microstructure and thermoelectric properties between room temperature and 900 °C. After heat treatment at 900 °C, the CCO PAD film in-plane shows excellent properties in terms of electrical conductivity (280 S/cm at 900 °C) and Seebeck coefficient (220 µV/K at 900 °C). The calculated power factor in-plane (ab) reaches with 1125 µW/(m K²) 40 % of the single crystal value, surpassing the known-properties of CCO bulk ceramics. Examination of the microstructure shows a strong fiber texture of the film as well as a strong coarsening of the grains during the first heat treatment up to 900 °C.

Further data

Item Type:	Article in a journal
Keywords:	Powder aerosol deposition; Thermoelectric oxide; Calcium cobaltite; High power factor; Aerosol deposition method (ADM)
DDC Subjects:	600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos Profile Fields > Advanced Fields > Advanced Materials Research Institutions > Central research institutes > Bayreuth Center for Material Science and Engineering - BayMAT Faculties Faculties > Faculty of Engineering Science > Chair Functional Materials Profile Fields Profile Fields > Advanced Fields Research Institutions Research Institutions > Central research institutes
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-8218-3
Date Deposited:	18 Feb 2025 08:00
Last Modified:	18 Feb 2025 08:01
URI:	https://epub.uni-bayreuth.de/id/eprint/8218

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