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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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

Cited 30 times inthomson ciCited 27 times inthomson ci
Title
Structural investigations on lead-free Bi1/2Na1/2TiO3-based piezoceramics
Author
Schmitt, L. A.Kling, J.Hinterstein, M.Hoelzel, M.Jo, WookKleebe, H. -J.Fuess, H.
Keywords
Electric field-induced phase transition; Field experiment; In-situ; In-situ TEM; In-situ transmission; Lamellar domain; Lead-Free; Microstructural characteristics; Nanoscale levels; Phase co-existence; Piezo-ceramics; Structural investigation; Superlattice reflections; Systematic study; TiO
Issue Date
2011-06
Publisher
SPRINGER
Citation
JOURNAL OF MATERIALS SCIENCE, v.46, no.12, pp.4368 - 4376
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.
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DOI
10.1007/s10853-011-5427-6
ISSN
0022-2461
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MSE_Journal Papers
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