Title :
Piezoelectric relaxation in bismuth titanate based ferroelectric ceramics
Author :
Maeder, Marlyse Demartin ; Damjanovic, Dragan ; Voisard, Cyril ; Martin, Pedro Duran ; Setter, Nava
Author_Institution :
Dept. of Mater., Swiss Fed. Inst. of Technol., Lausanne, Switzerland
Abstract :
The dynamic piezoelectric behavior of bismuth titanate based ferroelectric ceramics has been characterized as a function of the frequency and temperature. Both increase and decrease of the piezoelectric coefficient with the frequency have been observed. The influence of the microstructure and the anisotropy of properties on relaxation are discussed. A model based on the properties of a composite of two materials connected in series is proposed to explain the relaxation
Keywords :
bismuth compounds; crystallites; densification; dielectric polarisation; dielectric relaxation; ferroelectric ceramics; grain size; permittivity; piezoceramics; powder technology; sintering; Aurivillius phases; Bi2Ti3O9; BiTi3O12; BiTiO; Debye-type relaxation; SrBi4TiO15; anisotropy of properties; composite model; densification; dielectric polarization; dynamic piezoelectric behavior; ferroelectric ceramics; frequency dependence; microstructure; piezoelectric coefficient; piezoelectric hysteresis; piezoelectric relaxation; plate-like grains; powder processing; processing conditions; pseudo-perovskite layers; temperature dependence; Anisotropic magnetoresistance; Bismuth; Ceramics; Ferroelectric materials; Frequency; Microstructure; Piezoelectric materials; Stress; Temperature; Titanium compounds;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.941602
