Abstract
In this paper, the synergistic effects of Ce4+ ions incorporation into the (Bi2O2)2+ layer and Mo6+ ions at the Nb site on the electrical properties of CaBi2−xCexNb2−xMoxO9 high-temperature piezoelectric ceramics were studied. The appearance of pseudo-tetragonal phase owing to the introduction of Ce4+ ions is beneficial to the polarization switching, and thus, an enhanced piezoelectric response (d33 = 19 pC/N) was obtained in the x = 0.03 sample. Both the ferroelectric and dielectric properties of the doped samples are enhanced. Moreover, the reduction of the oxygen vacancies of the samples resulting from Mo6+ cations could also facilitate the improvement of electrical properties. As a result, a high Curie temperature (TC = 941 °C) and good electrical properties (Pr =14.3 µC/cm2, ρ = 1.1 × 105 Ω cm at 600 °C) were obtained in Ce/Mo-co-substituted CaBi2Nb2O9 ceramics. The results are rather important to explore the piezoelectric ceramics used in high-temperature environment.
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This work was supported by the National Key Research and Development Program of China (2017YFA0403502) and the Joint Funds of the National Natural Science Foundation of China and the Chinese Academy of Sciences' Large-Scale Scientific Facility (Grant No. U1832115).
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Pan, C.B., Zhao, G.C., Li, S.M. et al. Enhanced electrical properties in Ce/Mo co-substituted CaBi2Nb2O9 high-temperature piezoelectric ceramic. J Mater Sci: Mater Electron 32, 19938–19946 (2021). https://doi.org/10.1007/s10854-021-06518-w
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DOI: https://doi.org/10.1007/s10854-021-06518-w