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Abstract
The topography, structure, thermal, magnetic, and electrical properties of Bi4V2-xFexO11-δ ceramics substituted with x = 0.5 and 0.7 Fe were studied. The microscope analysis showed the presence of iron-rich nanocrystals formed on the Bi-Fe-V-O grains. The X-ray diffraction studies confirmed that grains are built mostly of tetragonal Bi4V1.5Fe0.5O10.5 phase. Thermal properties analysis showed an order-disorder type γ ↔ γʹ phase transition at a temperature of around 916 K, pronounced in samples doped with x = 0.5 Fe. The magnetic anomaly was observed in ceramics doped with x = 0.7 Fe which was assigned to Morin transition of Fe2O3. The conductivity was measured over a wide frequency range from 10 mHz to 1 MHz and at a wide temperature range from 373 to 923 K, using impedance spectroscopy. The D.C. conduction process was due to oxygen vacancies hopping while at low temperatures electron holes hopping is also possible.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
no. 42,
pages 5015 - 5022,
ISSN: 0955-2219 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Wójcik N., Polcyn K., Karczewski J., Górnicka K., Barczyński R.: High-conducting Bi4V2-xFexO11-δ ceramics containing Fe2O3 nanocrystals: Structure and properties// JOURNAL OF THE EUROPEAN CERAMIC SOCIETY -Vol. 42,iss. 12 (2022), s.5015-5022
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jeurceramsoc.2022.05.012
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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