Figure 5.

Hysteresis loops of PMNT/ZnO ceramics measured at 20 Hz. The figure showed the relation of the applied alternative current electric field at 20 Hz and measured polarization of the pure PMNT ceramic (black line and square symbol) and PMNT ceramics incorporated with 0.05 (red line and circle symbol), 0.1 (blue line and face up triangle symbol), 0.5 (green line and tilted square symbol), and 1 (violet line and face down triangle symbol) wt.% ZnO.