Characterization of CaTi0.9Fe0.1O3/La0.98Mg0.02NbO4 composite

A composite of CaTi 0.9 Fe 0.1 O 3 and electrolyte material, i.e. magnesium doped La 0.98 Mg 0.02 NbO 4 was prepared and studied. The phase content and the sample microstructure was examined by an X-ray diffraction method and scanning electron microscopy. EDS measurements were done both for composit...

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Bibliographic Details
Published in:Central European journal of physics 2013-02, Vol.11 (2), p.213-218
Main Authors: Mielewczyk-Gryn, Aleksandra, Lendze, Tomasz, Gdula-Kasica, Katarzyna, Jasinski, Piotr, Krupa, Andrzej, Kusz, Boguslaw, Gazda, Maria
Format: Article
Language:English
Subjects:
Biological and Medical Physics
Biophysics
diffusion couple
Environmental Physics
Geophysics/Geodesy
perovskites
Physical Chemistry
Physics
Physics and Astronomy
proton conductors
Research Article
x-ray diffraction
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Summary:A composite of CaTi 0.9 Fe 0.1 O 3 and electrolyte material, i.e. magnesium doped La 0.98 Mg 0.02 NbO 4 was prepared and studied. The phase content and the sample microstructure was examined by an X-ray diffraction method and scanning electron microscopy. EDS measurements were done both for composite samples and the diffusion couple. The electrical properties were studied by four terminal DC method. The high-temperature interaction between the two components of the composite has been observed. It has been suggested that lanthanum diffused into the perovskite phase and substituted for calcium whereas calcium and niobium formed the Ca 2 Nb 2 O 7 pyrochlore phase. At 1500°C very large crystallites of the pyrochlore were observed. Regardless of strong interaction between the composite components, its total conductivity was weakly dependent on the sintering temperature.
ISSN:1895-1082
2391-5471
1644-3608
2391-5471
DOI:10.2478/s11534-012-0152-6