Ferroelectric Phase Transitions in Non-Stoichiometric Sodium-Bismuth Titanate Ceramics

Features are studied of the phase formation, structural parameters, microstructure, and dielectric and ferroelectric properties of non-stoichiometric (Na 0.5 + x Bi 0.5 )TiO 3 ceramics with x = 0–0.1. The investigated samples exhibit ferroelectric phase-transition behavior as anomalies and peaks in...

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Bibliographic Details
Published in:Bulletin of the Russian Academy of Sciences. Physics 2018-03, Vol.82 (3), p.269-272
Main Authors: Politova, E. D., Strebkov, D. A., Mosunov, A. V., Golubko, N. V., Kaleva, G. M., Sadovskaya, N. V., Stefanovich, S. Yu
Format: Article
Language:English
Subjects:
Bismuth titanate
Ceramics
Dielectric properties
Dielectrics
Ferroelectric materials
Ferroelectricity
Hadrons
Heavy Ions
Nuclear Physics
Phase transitions
Physics
Physics and Astronomy
Polar environments
Proceedings of the XXI National Conference on Magnetoelectrics Physics
Relaxors
Second harmonic generation
Sodium
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Summary:Features are studied of the phase formation, structural parameters, microstructure, and dielectric and ferroelectric properties of non-stoichiometric (Na 0.5 + x Bi 0.5 )TiO 3 ceramics with x = 0–0.1. The investigated samples exhibit ferroelectric phase-transition behavior as anomalies and peaks in dielectric permittivity near 400 and 600 K, respectively. Study of the second harmonic generation shows that phase transitions near 400 K exhibit relaxor-type behavior, indicating there are polar regions in the nonpolar matrix. An increase in the Na/Bi ratio in the initial compositions improves the dielectric and ferroelectric properties of the ceramics.
ISSN:1062-8738
1934-9432
DOI:10.3103/S106287381803019X