Abstract
BaTi1−xYxO3−x/2 ceramics were prepared by using a solid state reaction process. All the samples have a tetragonal structure below the solution limit of 3 at.%. And the doping of Y3+ inhibits the grain growth of BaTiO3 ceramics. In addition, substitution of Y3+ at B-site in BaTiO3 leads to an increase of Curie temperature (Tc). Specifically, the sample with x = 0.015 has the raised Tc temperature (136 °C) and exhibits a larger electric field induced strain (0.27 %) at the electric field of 65 kV/cm and room temperature. Besides, oxygen loss is restrained due to the incorporation of Y3+ in BaTiO3. Conductivity of the sample with x = 0.005 is dominated by a p-type conduction in air and oxygen, while in nitrogen, oxygen loss leads to it changes to an n-type conduction. However, the sample with x = 0.02 behaves a mixed conduction in oxygen, air and nitrogen, in which the species responsible are primarily O2− ions and holes.
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Acknowledgments
This work was financially supported by National Natural Science Foundation of China (No. 51402234), Natural Science Basic Research Plan (No. 2015JQ5198, 2015JQ5142), International Cooperation Project (2013KW14-01) and Young Talent fund of University Association for Science and Technology (20150106) in Shaanxi Province, the doctoral starting fund (No. 101-211408) and New-Star of science and technology (101-256101511) of Xi’an University of Technology.
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Wang, X., Ren, P., Wang, Q. et al. Dielectric, piezoelectric and conduction properties of yttrium acceptor-doped BaTiO3 ceramics. J Mater Sci: Mater Electron 27, 11762–11769 (2016). https://doi.org/10.1007/s10854-016-5315-6
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DOI: https://doi.org/10.1007/s10854-016-5315-6