Title :
Electric field dependence of dh in lead magnesium niobate-lead titanate ceramics
Author :
Taylor, D.J. ; Damjanovic, D. ; Bhalla, A.S. ; Cross, L.E.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Abstract :
The hydrostatic piezoelectric coefficient dh, in the 0.9PMN-0.1PT ferroelectric relaxor composition was studied as a function of the electric bias field at 500 Hz using a laser interferometer. It was found that dh approaches a very large value of ~300 pC/N and then saturates at an electric bias field of ~3.5 kV/cm. The voltage coefficient and the sensitivity were also found to be comparable to and larger than, respectively, those in lead zirconate-titanate (PZT) ceramics despite a high dielectric constant in the relaxor material. Unlike the d33 and d31 piezoelectric coefficients, dh did not, under the experimental conditions, depend on electric bias field in a manner predicted by the phenomenological theory
Keywords :
ceramics; ferroelectric materials; lead compounds; permittivity; piezoelectric materials; 500 Hz; PMN-PbTiO3; PbMgO3NbO3-PbTiO3; dielectric constant; electric bias field; ferroelectric relaxor composition; hydrostatic piezoelectric coefficient; sensitivity; voltage coefficient; Ceramics; Dielectrics; Ferroelectric materials; Frequency; Magnesium; Piezoelectric materials; Relaxor ferroelectrics; Resonance; Temperature; Titanium compounds;
Conference_Titel :
Applications of Ferroelectrics, 1990., IEEE 7th International Symposium on
Conference_Location :
Urbana-Champaign, IL
Print_ISBN :
0-7803-0190-0
DOI :
10.1109/ISAF.1990.200259
