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

Volume

1

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

109

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401562

Filename

401562