期刊
CERAMICS INTERNATIONAL
卷 42, 期 8, 页码 10399-10404出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.03.179
关键词
BiFeO3-BaTiO3 ceramic; Mn doping; Microstructure; Piezoelectricity
资金
- Academic Research Fund of Hoseo University [2013-0395]
The effects of Mn doping were investigated in 0.75BiFeO(3)-0.25BaTiO(3) ceramics sintered at 940-1020 degrees C in air. 0.75BF-0.25BT ceramics doped with 0-0.7 wt% MnO2 were prepared by a conventional ceramic process. The effects of the doping are strongly dependent on the sintering temperature and doping concentration. MnO2 doping at less than the solubility limit of 0.5 wt% suppressed the formation of large pores during the sintering, and kept the sample dense at high sintering temperatures. The onset temperature of abrupt grain growth also increased. The piezoelectric properties were poor when the grain size was about 1 pm or less, but showed a significant increase in samples with grain size greater than a few micrometers, independent of the Mn doping concentration. The piezoelectric properties are more strongly influenced by the grain size than the Mn doping. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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