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

Journal Article · Mon Aug 10 04:00:00 EDT 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3193544· OSTI ID:21294237

Tai, Cheuk W; Lereah, Y ^[1]

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1. 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, Journal Name: Applied Physics Letters Journal Issue: 6 Vol. 95; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

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