Nanoscale oxygen octahedral tilting in 0.90(Bi{sub 1/2}Na{sub 1/2})TiO{sub 3}-0.05(Bi{sub 1/2}K{sub 1/2})TiO{sub 3}-0.05BaTiO{sub 3} lead-free perovskite piezoelectric ceramics
- Department of Physical Electronics, School of Electrical Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Ramat Aviv 69978 (Israel)
The oxygen octahedral tilted domains in 0.90(Bi{sub 1/2}Na{sub 1/2})TiO{sub 3}-0.5(Bi{sub 1/2}K{sub 1/2})TiO{sub 3}-0.5BaTiO{sub 3} lead-free perovskite piezoelectric ceramic have been studied by transmission electron microscopy (TEM). Selected-area electron diffraction patterns shows the (1/2)ooo and (1/2)ooe reflections, indicating the presence of antiphase (a{sup -}a{sup -}a{sup -}) and in-phase (a{sup o}a{sup o}c{sup +}) octahedral tilting, respectively. The morphology and distributions of these tilted domains are shown in the centered dark-field images. Further, the Bragg-filtered high-resolution TEM image reveals that the size of the in-phase tilted domains varies from 1 to 8 nm across. The ceramic contains the mixture of nontilted and variants of the antiphase and in-phase tilted domains.
- OSTI ID:
- 21294237
- Journal Information:
- Applied Physics Letters, Vol. 95, Issue 6; Other Information: DOI: 10.1063/1.3193544; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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