Achieving large electric-field-induced strain in lead-free piezoelectrics
| Autor: | Patrick Tung, John E. Daniels, Márton Major, Deborah Schneider, Richard Chen, Haosu Luo, Torsten Granzow |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Materials Research Letters, Vol 7, Iss 5, Pp 173-179 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2166-3831 21663831 |
| DOI: | 10.1080/21663831.2019.1570979 |
| Popis: | Lead-free piezoelectric single crystals of Fe-doped 0.95(Bi1/2Na1/2)TiO3-0.05BaTiO3 are shown to combine multiple mechanisms for high strain and an effective piezoelectric coefficient of up to 3260 pm/V. This is explained based on the analysis of superstructure reflections from diffuse synchrotron x-ray scattering. It depends on three factors: (1) the stabilization of a local tetragonal structure by (Fe’- $ V_O^{ \bullet \bullet } $ )• defect dipoles, (2) the reversible creation of a morphotropic phase boundary under field, and (3) the field-induced reversible transition between a short-range ordered relaxor and a long-range ordered ferroelectric state. |
| Databáze: | Directory of Open Access Journals |
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