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Jo, Wook
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Electric-field-induced phase transformation at a lead-free morphotropic phase boundary: Case study in a 93%(Bi0.5Na0.5)TiO3-7% BaTiO3 piezoelectric ceramic

Author(s)
Daniels, John E.Jo, WookRoedel, JuergenJones, Jacob L
Issued Date
2009-07
DOI
10.1063/1.3182679
URI
https://scholarworks.unist.ac.kr/handle/201301/7430
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=67651241713
Citation
APPLIED PHYSICS LETTERS, v.95, no.3
Abstract
The electric-field-induced strain in 93%(Bi0.5Na0.5)TiO3-7%BaTiO3 polycrystalline ceramic is shown to be the result of an electric-field-induced phase transformation from a pseudocubic to tetragonal symmetry. High-energy x-ray diffraction is used to illustrate the microstructural nature of the transformation. A combination of induced unit cell volumetric changes, domain texture, and anisotropic lattice strains are responsible for the observed macroscopic strain. This strain mechanism is not analogous to the high electric-field-induced strains observed in lead-based morphotropic phase boundary systems. Thus, systems which appear cubic under zero field should not be excluded from the search for lead-free piezoelectric compositions.
Publisher
AMER INST PHYSICS
ISSN
0003-6951

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