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Abstract
In this work, the influence of the substitution of niobium by titanium in Y3Nb1-xTixO7-δ on the structural and electrical properties is reported. Several experimental techniques, i.e. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-Ray Photoelectron Spectroscopy (XPS) and Electrochemical Impedance Spectroscopy (EIS), were applied to investigate the system Y3Nb1-xTixO7-δ. Titanium in Y3Nb1-xTixO7-δ is an acceptor-type dopant which charge is mainly compensated by oxygen vacancies, moreover, it may adopt different valence states, therefore, oxygen ion-, proton- and electronic-type conductivity are expected. Very interesting, non-monotonic changes in electrical and structural properties as a function of titanium content were observed. The competition between the increasing charge carrier concentration and structural phenomena such as short-range pyrochlore ordering and/or vacancy clustering was proposed as responsible for this non-monotonicity.
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
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JOURNAL OF ALLOYS AND COMPOUNDS
no. 767,
pages 1186 - 1195,
ISSN: 0925-8388 - Language:
- English
- Publication year:
- 2018
- Bibliographic description:
- Winiarz P., Mielewczyk-Gryń A., Wachowski S., Jasiński P., Witkowska A., Gazda M.: Structural and electrical properties of titanium-doped yttrium niobate// JOURNAL OF ALLOYS AND COMPOUNDS. -Vol. 767, (2018), s.1186-1195
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2018.07.134
- Sources of funding:
-
- Project Triple conducting oxides
- Verified by:
- Gdańsk University of Technology
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