We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Phase Formation and Phase Transitions in Nonstoichiometric Sodium Bismuth Titanate Ceramics.
- Authors
Politova, E. D.; Mosunov, A. V.; Strebkov, D. A.; Golubko, N. V.; Kaleva, G. M.; Loginov, B. A.; Loginov, A. B.; Stefanovich, S. Yu.
- Abstract
We have studied the phase formation, microstructure, and dielectric and ferroelectric properties of (Na0.5-xBi0.5)TiO3 and (Na0.5Bi0.5 + x)TiO3 nonstoichiometric ceramics with Na/Bi < 1 and x = 0-0.1. The grain size of the ceramics has been shown to decrease with increasing x. The temperature dependences of dielectric permittivity for the samples studied have anomalies near ~400 K and peaks at ~600 K, corresponding to ferroelectric phase transitions. The phase transitions near 400 K demonstrate relaxor behavior, indicative of the presence of polar regions in a nonpolar matrix, as supported by laser second harmonic generation measurements. In addition, the (Na0.5Bi0.5 + x)TiO3 samples with x > 0.05 have anomalies near 900 K, confirming the presence of Bi4Ti3O12 as an impurity phase, which is accompanied by an increase in the spontaneous polarization of these samples.
- Subjects
BISMUTH titanate; NONSTOICHIOMETRIC compounds; CERAMIC materials; SODIUM; PHASE transitions; ELECTRIC properties of metals
- Publication
Inorganic Materials, 2018, Vol 54, Issue 7, p744
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1134/S0020168518070154