Investigations of electrostrictive Pb(Mg1/3Nb2/3)O-3-PbTiO3 ceramics underhigh-power drive conditions: Importance of compositional fluctuations on residual hysteresis
D. Viehland et Jf. Li, Investigations of electrostrictive Pb(Mg1/3Nb2/3)O-3-PbTiO3 ceramics underhigh-power drive conditions: Importance of compositional fluctuations on residual hysteresis, J APPL PHYS, 89(3), 2001, pp. 1826-1835
The high-field polarization behavior of electrostrictive Pb(Mg1/3Nb2/3)O-3-
PbTiO3 ceramics has been investigated as a function of measurement frequenc
y, drive field, and temperature. It was observed that hysteretic losses inc
rease with increasing frequency. Significant variations in loss were found
between specimens of similar composition obtained from different sources, w
hich became more pronounced with increasing temperature. The results indica
te that careful synthesis and processing are crucial to the thermal stabili
ty of electrostrictive ceramics in high-power source applications. Further
investigations revealed the potential use of accelerated aging by substitue
nt introduction for mitigation of thermal stability concerns. (C) 2001 Amer
ican Institute of Physics.