Title :
Flexure-electrical effect in ferroelectric and paraelectric ceramics with perovskite structure
Author :
Gridnev, Stanislav
Author_Institution :
Dept. of Solid State Phys., Voronezh State Univ., Russia
Abstract :
An electric voltage, arising across a sample of ferroelectric PZT or paraelectric SrTiO3 ceramic with perovskite structure under an external bending stress, has been measured over a wide temperature range. Such a flexure-electrical effect occurs in any substance in the presence of a strain gradient. It was discovered that a.c. voltage arising on the sample faces normal to a strain gradient is directly proportional to the amplitude of sample vibrations and the sample thickness. A rather large value of a.c. voltage and its high temperature stability in the range of 20-200°C for both materials under study may be interesting from an applications point of view
Keywords :
bending; dielectric polarisation; electromechanical effects; ferroelectric materials; lead compounds; piezoceramics; strontium compounds; vibrations; 20 to 200 C; AC voltage; PZT; PbZrO3TiO3; SrTiO3; electric voltage; external bending stress; ferroelectric PZT ceramic; flexure-electrical effect; macroscopic polarization; nonlocal piezoelectric effect; paraelectric SrTiO3 ceramic; perovskite structure; sample thickness; strain gradient; temperature stability; vibration amplitude; wide temperature range; Capacitive sensors; Ceramics; Ferroelectric materials; Liquid crystals; Strain measurement; Temperature distribution; Temperature sensors; Titanium compounds; Vibrations; Voltage;
Conference_Titel :
Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on
Conference_Location :
East Brunswick, NJ
Print_ISBN :
0-7803-3355-1
DOI :
10.1109/ISAF.1996.598169
