TY - GEN
T1 - Hysteresis measurements of lead-free ferroelectric ceramics BNBK79 (Bi 0.5Na0.5) TiO3-(Bi0.5K 0.5) TiO3-BaTiO3
AU - Linhart, J.
AU - Hana, P.
AU - Burianova, L.
AU - Zhang, S. J.
PY - 2011
Y1 - 2011
N2 - The research deals with nonlinear properties of piezoelectric, ferroelectric and mechanical response of the lead-free type ferroelectric ceramics x(Bi0.5 Na0.5) TiO3-y(Bi0.5 K0.5) TiO3-zBaTiO3, where x 0.79, y 0.14, and z 0.07, in short form BNBK79. Small mechanical deformation and polarization measurements are realized using LVDT (Linear Variable Differential Transformer) measuring system. Velocities of ultrasound wave propagation in presence of an external DC electric field are also determined. The orientation of spontaneous polarization can be switched under the action of sufficiently strong electric fields. This causes the nonlinear behaviour of polarization-electric field (D-E), strain-electric field (S-E) and the velocity of ultrasonic waves-electric field (v-E) relationship. Butterfly shape of the responses is observed above the coercive field. The described BNBK79 ceramics is significant candidate for lead-free actuator applications.
AB - The research deals with nonlinear properties of piezoelectric, ferroelectric and mechanical response of the lead-free type ferroelectric ceramics x(Bi0.5 Na0.5) TiO3-y(Bi0.5 K0.5) TiO3-zBaTiO3, where x 0.79, y 0.14, and z 0.07, in short form BNBK79. Small mechanical deformation and polarization measurements are realized using LVDT (Linear Variable Differential Transformer) measuring system. Velocities of ultrasound wave propagation in presence of an external DC electric field are also determined. The orientation of spontaneous polarization can be switched under the action of sufficiently strong electric fields. This causes the nonlinear behaviour of polarization-electric field (D-E), strain-electric field (S-E) and the velocity of ultrasonic waves-electric field (v-E) relationship. Butterfly shape of the responses is observed above the coercive field. The described BNBK79 ceramics is significant candidate for lead-free actuator applications.
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U2 - 10.1109/IWECMS.2011.5952379
DO - 10.1109/IWECMS.2011.5952379
M3 - Conference contribution
AN - SCOPUS:80052018257
SN - 9781612843957
T3 - 2011 10th International Workshop on Electronics, Control, Measurement and Signals, ECMS 11
BT - 2011 10th International Workshop on Electronics, Control, Measurement and Signals, ECMS 11
T2 - 2011 10th International Workshop on Electronics, Control, Measurement and Signals, ECMS 11
Y2 - 1 June 2011 through 3 June 2011
ER -