Abstract
The (1 − x) Bi (Fe0.9Al0.05Yb0.05) O3–xBaTiO3 (BFAYO-x BTO) ceramics were synthesized by microwave sintering (MWS) and conventional sintering (CS) methods. The crystal structure, surface morphology, dielectric and ferroelectric properties were investigated. XRD patterns show that BTO tetragonal and BFO rhombohedral phases coexist in both MWS and CS samples, and that the diffraction peaks of MWS samples shift to lower angles due to the larger ionic radius of Ba2+ compared with Bi3+. The lattice constant of BFAYO-x BTO ceramics increases with the increase of BTO content. It was found that the average grain size of the MWS ceramic is much smaller than that of the CS ceramic. Dielectric measurements reveal that the dielectric loss and dielectric constant increase with BTO content increasing. The introduction of BTO into BFAYO-based ceramic contribute to the enhancement of the dielectric relaxation behavior. The P–E hysteresis loops demonstrate that the remnant polarization (Pr) and the coercive field (EC) of the MWS samples are smaller than those of the CS samples. Pr and EC first increase, then decrease and then increase again with the increase of BTO content. The maximum and minimum values of the remnant polarization were obtained at x = 0.25 and 0.3, respectively.
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Acknowledgments
This work was supported by the Chongqing research program of basic research and frontier technology (CSTC2019jcyj-msxmX0071, CSCT2018jcyjAX0416), the program for innovation teams in the University of Chongqing, China (CXTDX201601032), Research foundation of education bureau of Chongqing, China (KJQN201801509), the leading talents of scientific and technological innovation in Chongqing (CSTCCXLJRC201919), the excellent talent project in university of Chongqing (2017-35),the Innovation Program for Chongqing’s Overseas Returnees( cx2019159) and the postgraduate science and technology innovation project of Chongqing University of Science and Technology( YKJCX1920214).
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Chen, G., Ji, C., Fan, T. et al. Effects of Sintering Method and BaTiO3 Dopant on the Microstructure and Electric Properties of Bi (Fe0.9Al0.05Yb0.05) O3-Based Ceramics. J. Electron. Mater. 49, 2608–2616 (2020). https://doi.org/10.1007/s11664-020-07968-4
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DOI: https://doi.org/10.1007/s11664-020-07968-4