Influence of Ba addition on the dielectric and optic properties of (1 - x) Na0.5Bi0.5TiO3-xBaTiO3 (x = 0, 0.025, 0.0325 and 0.05) single crystals

High-quality, large-size lead-free (1 - x)Na 0.5 Bi 0.5 TiO 3 -xBaTiO 3 ((1 - x)NBT-xBT) single crystals (x = 0, 0.025, 0.0325 and 0.05) were grown using the Czochralski method. Dielectric and transmitted light intensity properties were measured for these crystals. The broad anomalies exhibited in t...

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Published inPhase transitions Vol. 89; no. 3; pp. 310 - 316
Main Authors Suchanicz, J., Kruzina, T.V., Pozdeev, V.G., Popov, S.A.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 03.03.2016
Taylor & Francis Ltd
Subjects
Czochralski method
Dielectric properties
ferroelectric properties
Ferroelectrics
lead-free materials
Optical properties
Phase transitions
Single crystals
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Summary:High-quality, large-size lead-free (1 - x)Na 0.5 Bi 0.5 TiO 3 -xBaTiO 3 ((1 - x)NBT-xBT) single crystals (x = 0, 0.025, 0.0325 and 0.05) were grown using the Czochralski method. Dielectric and transmitted light intensity properties were measured for these crystals. The broad anomalies exhibited in the temperature dependence of the transmitted light corresponded to structural and dielectric anomalies and were related to the temperature dependence of polar regions and the appearance of a long-range ferroelectric state. We explain our results based on local electromechanical fields, by inhomogeneity of the ion distribution and the mismatch in ion size. We suggested that the NBT-BT system can be a promising lead-free piezoelectric material for ultrasonic delay-line applications, broadband transducers and sensors.
ISSN:0141-1594
1029-0338
DOI:10.1080/01411594.2015.1079322