Title :
Basic Studies of Electrically Controlled Elasticity of Lead Zirconate Titanate (PZT) Ceramic and its Application to Intercepting Elastic Waves
Author :
Takarada, J. ; Tahara, K. ; Ueda, H. ; Imoto, K. ; Date, M. ; Fukada, E. ; Yamamoto, K. ; Tajitsu, Y.
Author_Institution :
Kansai Univ., Osaka
Abstract :
We studied a novel technique for controlling the elastic coefficient of a piezoelectric lead zirconate titanate (PZT) ceramic by connecting a negative-capacitance circuit that behaves as a "negative capacitor". Thus, we can realize control through a mechanism in which PZT is softened and hardened. On the basis of this technology, we developed a simple experimental system for intercepting elastic waves in the frequency range from 8 kHz to 110 kHz. We determined the attenuation factor in transmission loss of the experimental system, which was more than 10 dB in this frequency range. The maximum attenuation factor in transmission loss was about 60 dB at a frequency of 91 kHz.
Keywords :
ceramic capacitors; elastic waves; elasticity; hardening; lead compounds; piezoceramics; softening; PZT; attenuation factor; elastic coefficient; elastic waves; frequency 8 kHz to 110 kHz; hardening; negative-capacitance circuit; piezoelectric lead zirconate titanate ceramics; softening; transmission loss; Attenuation; Capacitive sensors; Capacitors; Ceramics; Circuits; Elasticity; Frequency; Piezoelectric materials; Propagation losses; Titanium compounds;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393343
