Effects of barium substitution on the dielectric properties of Sr(Fe0.5Nb0.5)O3 ceramics

The Ba-substituted Sr 1− x Ba x (Fe 0.5 Nb 0.5 )O 3 (SBFN, x  = 0, 0.2, 0.5, 0.8) ceramics were prepared by a conventional solid-state sintering, and their microstructure and dielectric properties were investigated. The single-phase SBFN were obtained up to x  = 0.8 Ba substitution and the lattice p...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2015, Vol.26 (1), p.134-138
Main Authors: Wang, Zhuo, Li, Hai Juan, Zhang, Liang Liang, Wen, Yong Fei, Pu, Yong Ping
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Science
Optical and Electronic Materials
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Summary:The Ba-substituted Sr 1− x Ba x (Fe 0.5 Nb 0.5 )O 3 (SBFN, x  = 0, 0.2, 0.5, 0.8) ceramics were prepared by a conventional solid-state sintering, and their microstructure and dielectric properties were investigated. The single-phase SBFN were obtained up to x  = 0.8 Ba substitution and the lattice parameter increased with Ba substitution concentration. The dielectric constant increased with Ba substitution, and the highest value of ~180,000 was observed in the x  = 0.8 Ba-substituted specimen at 1 kHz. Besides, the dielectric constant increased rapidly a giant value more than 10 6 over a broad temperature range for x  = 0.8 Ba-substituted specimen. The obtained electric and dielectric properties in Ba-substituted SBFN were discussed in terms of the internal barrier layer capacitor model and electrode response.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-014-2374-4