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Structural investigations on lead-free Bi1/2Na1/2TiO3-based piezoceramics

Structural investigations on lead-free Bi1/2Na1/2TiO3-based piezoceramics In this study, recent results from our electron, X-ray, and neutron-diffraction experiments with emphasis on the binary Bi1/2Na1/2TiO3-BaTiO3 (BNT–BT) and ternary Bi1/2Na1/2TiO3–BaTiO3–K0.5Na0.5NbO3 (BNT–BT–KNN) system are presented and contrasted with literature. The experimental results clearly revealed a phase coexistence on the nanoscale level. A systematic study of superlattice reflections in conjunction with microstructural characteristics showed that the BNT-based systems have specific properties in common, which, however, strongly depend on composition. In situ transmission electron microscopy (TEM) electric field experiments unequivocally demonstrated the evolution of lamellar domains. Combining in situ TEM results with published in situ neutron-diffraction experiments, we proposed an electric field-induced phase transition that results in the giant unipolar and bipolar strain observed in specific compositions of the ternary system. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science Springer Journals

Structural investigations on lead-free Bi1/2Na1/2TiO3-based piezoceramics

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References (46)

Publisher
Springer Journals
Copyright
Copyright © 2011 by Springer Science+Business Media, LLC
Subject
Materials Science; Materials Science, general; Characterization and Evaluation of Materials; Polymer Sciences; Continuum Mechanics and Mechanics of Materials; Crystallography and Scattering Methods; Classical Mechanics
ISSN
0022-2461
eISSN
1573-4803
DOI
10.1007/s10853-011-5427-6
Publisher site
See Article on Publisher Site

Abstract

In this study, recent results from our electron, X-ray, and neutron-diffraction experiments with emphasis on the binary Bi1/2Na1/2TiO3-BaTiO3 (BNT–BT) and ternary Bi1/2Na1/2TiO3–BaTiO3–K0.5Na0.5NbO3 (BNT–BT–KNN) system are presented and contrasted with literature. The experimental results clearly revealed a phase coexistence on the nanoscale level. A systematic study of superlattice reflections in conjunction with microstructural characteristics showed that the BNT-based systems have specific properties in common, which, however, strongly depend on composition. In situ transmission electron microscopy (TEM) electric field experiments unequivocally demonstrated the evolution of lamellar domains. Combining in situ TEM results with published in situ neutron-diffraction experiments, we proposed an electric field-induced phase transition that results in the giant unipolar and bipolar strain observed in specific compositions of the ternary system.

Journal

Journal of Materials ScienceSpringer Journals

Published: Mar 10, 2011

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