Title :
Active control of nonlinear piezoelectric effect and its application to 20 dB efficiency improvement of SAW elastic convolver
Author :
Cho, Yasuo ; Haitsuka, Shin-ichi ; Kadota, Michio
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
The newly discovered effect concerning the enhancement of the nonlinear piezoelectricity of lead zirconate titanate (PZT) ceramics by applying a bias electric held to the substrate has enabled more than 20 dB efficiency enlargement in a surface acoustic wave (SAW) elastic convolver. Next, the new novel biasing method for stabilizing the time variation of convolution output signal with static field and for obtaining more efficient convolver is proposed. The temperature characteristic of PZT convolver is also investigated. Finally the relation between this new discovered effect and the remanent polarization of PZT ceramics is investigated. These results suggest the possibility of producing a SAW elastic convolver with higher efficiency than that of a SAW monolithic convolver
Keywords :
ceramics; electric field effects; lead compounds; piezoceramics; piezoelectricity; polarisation; surface acoustic wave convolution; PZT; PZT ceramics; PZT convolver; PbZrO3TiO3; SAW elastic convolver; active control; bias electric; biasing method; convolution output signal; efficiency enlargement; efficiency improvement; lead zirconate titanate; nonlinear piezoelectric effect; nonlinear piezoelectricity; remanent polarization; static field; substrate; surface acoustic wave elastic convolver; temperature characteristic; time variation; Ceramic materials/devices; Electric field effects; Nonlinearities; PZT materials/devices; Piezoelectric materials/devices; Polarization; Surface acoustic wave convolvers;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401562
