Patrick Tung, John E. Daniels, Márton Major, 等. Achieving large electric-field-induced strain in lead-free piezoelectrics[J]. 材料研究快报(英文), 2019,7(5):173-179.
Patrick Tung, John E. Daniels, Márton Major, et al. Achieving large electric-field-induced strain in lead-free piezoelectrics[J]. Materials Research Letters, 2019, 7(5): 173-179.
Patrick Tung, John E. Daniels, Márton Major, 等. Achieving large electric-field-induced strain in lead-free piezoelectrics[J]. 材料研究快报(英文), 2019,7(5):173-179.DOI: 10.1080/21663831.2019.1570979.
Patrick Tung, John E. Daniels, Márton Major, et al. Achieving large electric-field-induced strain in lead-free piezoelectrics[J]. Materials Research Letters, 2019, 7(5): 173-179.DOI: 10.1080/21663831.2019.1570979.
Achieving large electric-field-induced strain in lead-free piezoelectrics
BSTRACTLead-free piezoelectric single crystals of Fe-doped 0.95(Bi
1/2
Na
1/2
)TiO
3
-0.05BaTiO
3
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’-VO∙∙)
•
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.