Abstract
Transparent ferroelectric ceramics 0.88Pb(Mg1/3Nb2/3)O3–0.12PbTiO3 (0.88PMN–0.12PT) with different La-doping concentrations (0.5, 1.0, 1.5 and 2.0 mol%) were fabricated via solid-state reaction and two-stage sintering. The effects of La-doping on the microstructure and electrical properties of the 0.88PMN–0.12PT ceramics were investigated. All the La-doped 0.88PMN–0.12PT ceramics exhibit pure perovskite phase with extremely dense microstructure and high optical transmittance. Among them, the 1.0 mol% La-doped ceramics show the highest transparency around 70% in near-infrared region, which is very close to its theoretical transmittance and basically meet the requirement on the transparency of electro-optical applications. The remanent polarization Pr, coercive field Ec, εmax, the temperatures Tεmax corresponding to εmax of the 0.88PMN–0.12PT ceramics decreased, and the relaxor behavior enhanced apparently with increasing La-doping concentration, which may ascribe to the fact that the substitution of Pb2+ ions by La3+ions reduces the long-range coupling of BO6 octahedrons.
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Acknowledgements
This work was supported by the National Science Foundation of China (11504193, 51472131, 11604171), Natural Science Foundation of Shandong Province (ZR2015PE08), and the Program of Science and Technology in Qingdao City (16-5-1-79-jch, 16-5-1-99-jch), China.
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Ma, Z., Zhang, Y., Lu, C. et al. Synthesis and properties of La-doped PMN–PT transparent ferroelectric ceramics. J Mater Sci: Mater Electron 29, 6985–6990 (2018). https://doi.org/10.1007/s10854-018-8685-0
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DOI: https://doi.org/10.1007/s10854-018-8685-0