Title data
Fuierer, Paul ; Maier, Mitchell ; Exner, Jörg ; Moos, Ralf:
Anisotropy and thermal stability of hot-forged BICUTIVOX oxygen ion conducting ceramics.
In: Journal of the European Ceramic Society.
Vol. 34
(2014)
Issue 4
.
- pp. 943-951.
ISSN 0955-2219
DOI: https://doi.org/10.1016/j.jeurceramsoc.2013.10.016
Project information
Project title: |
Project's official title Project's id No information MO 1060/16-1 No information NSF grant # 1108466 |
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Project financing: |
Deutsche Forschungsgemeinschaft Materials World Network |
Abstract in another language
The oxygen ion conductivity of ultra dense, hot forged Bi4(MexV1−x)2O11 (BIMEVOX) ceramics is reported for the first time. A novel approach to electrode preparation, including laser trenching, was developed to perform 4-probe impedance spectroscopy and determine conductivity of small bar-shaped samples with high accuracy and precision. Hot forged (HF) Bi4(Cu0.05Ti0.05V0.90)2O11 (BICUTIVOX) ceramic, with modest preferred orientation (11%), exhibits anisotropy by a factor of 2 in its conductivity. Brick layer model (BLM) analysis of complex impedance plots reveals that the relative contribution of grains and grain boundaries to the total resistance is direction dependent, in the low temperature γ′ phase. The total ionic conductivity of BICUTIVOX, prepared either by hot-forging or conventional sintering, appears to be stable with thermal aging and cycling. Anisotropy in the thermal expansion of polycrystalline BIMEVOX ceramics is also reported.
Further data
Item Type: | Article in a journal |
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Refereed: | Yes |
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 Faculties Faculties > Faculty of Engineering Science > Chair Functional Materials Profile Fields > Advanced Fields > Advanced Materials Research Institutions > Central research institutes > Bayreuth Center for Material Science and Engineering - BayMAT Profile Fields Profile Fields > Advanced Fields Research Institutions Research Institutions > Central research institutes |
Result of work at the UBT: | Yes |
DDC Subjects: | 600 Technology, medicine, applied sciences > 620 Engineering |
Date Deposited: | 01 Dec 2014 09:41 |
Last Modified: | 16 May 2024 10:47 |
URI: | https://eref.uni-bayreuth.de/id/eprint/3859 |