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- Title
Electric field-induced strains, conductivities and energy-storage properties in NaBiTiO-Ba(MgNb)O ceramics.
- Authors
Liu, Xiao; Yuan, Chang-Lai; Liu, Xin-Yu; Li, Ying; Chen, Guo-Hua; Li, Xu-Qiong; Luo, Feng-hua
- Abstract
In this work, an electric field-induced giant strain response and electric displacement, as well as temperature-dependence dielectric, impedance and energy storage densities were studied in lead-free BNT-based ferroelectric system. The XRD analysis reveals that all the investigated ceramics have a pure perovskite structure. A maximum energy storage density up to 0.907 J/cm at 80 kV/cm is exhibited for (1− x) NaBiTiO- xBa(MgNb)O ceramics at an x of 0.07. Follow-up experiments confirm that an electric-field-induced phase transition, which results in giant strain up to 0.12% at 10 Hz, is also the origin of initially weak piezoelectricity. After doping a certain amount of Ba(MgNb)O, it is obvious that the dielectric peaks shift to low temperature and present dispersion characteristic. The increase in composition ( x) can suppress grain conductivity heavily in high temperatures, thus gives a way how to adjust the nominal BNT composition for the reduction of leakage conductivity.
- Subjects
LEAD-free ceramics; ELECTRIC displacement; DIELECTRIC properties of ferroelectric ceramic materials; DIELECTRIC properties of perovskite; PIEZOELECTRICITY
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 6, p4788
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-6124-7