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Detailed Program
Paper Number : LP-P06
Time Frame : 12:00~13:30
Presentation Date : Friday, 28, November
Session Name : Leadfree Piezoelectrics
Session Chair 1# : -
Session Chair 2# : -
Ferroelectric and piezoelectric properties of Bi(Zn2/3Ta1/3)O3 modified 0.67BiFeO3-0.33BaTiO3 ceramics
Mr.Jinsu Park
Chanwon National University
Lead-based piezoelectric ceramics with a perovskite structure, such as Pb(Zr,Ti)O3, are widely used for actuators, sensors and microelectronic devices because of their excellent piezoelectric properties. However, the toxicity of lead and its high vapor pressure during processing have led to a demand for alternative lead-free piezoelectric materials that are environmentally benign from the viewpoint of sustainable development. BiFeO3-BaTiO3 materials have been developed as a promising lead-free piezoelectric material for their potential applications piezoelectric devices [1-2]. Lead-free ceramics with compositions of 1-x[0.67BiFeO3-0.33BaTiO3]-xBi(Zn2/3Ta1/3)O3 (x = 0.00, 0.01, 0.02, 0.03, 0.04, and 0.05) [BF-BT-BZTx] have been prepared through by a conventional solid state reaction method. The effect of BZT addition on BF-BT have been investigated in terms of X-ray diffraction, microstructure, piezoelectric, and electrical properties. Based on the XRD studies, BZT modified BF-BT ceramics were found to be a pseudo-cubic perovskite structure without any secondary phases. The BF-BT-BZT 0.02 ceramic exhibited good ferroelectric, and piezoelectric properties. The remnant polarization (2Pr) and the coercive field (2Ec) for BF-BT-BZT 0.02 ceramic were observed to be 46 ¥ìC/cm2 and 52.19 kV/cm, respectively, whereas the piezoelectric constants d33 and d33* were 55 pC/N and 310 pm/V, respectively.
Acknowledgements : This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (2013R1A1A4A01010612) and by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIP) (2011-0030058) and by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST; 2012-045424)