Title :
Crystal growth and ferroelectric related properties of (1-x)Pb(A 1/3Nb2/3)O3-xPbTiO3 (A=Zn 2+, Mg2+)
Author :
Park, Seung-Eek ; Mulvihill, Maureen L. ; Lopath, Patrick D. ; Zipparo, Mike ; Shrout, Thomas R.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Abstract :
Crystals of (1-x)Pb(A1/3Nb2/3)O3-xPbTiO3 (A=Zn2+, Mg2+) were grown by the flux technique. The dielectric and piezoelectric properties as a function of composition and crystal orientation have been evaluated. Both MPB and non-MPB crystals were found to possess high piezoelectric properties. Values of longitudinal electromechanical coupling coefficients (k33)>90%, dielectric constants ranging from 3000 to 5000 with low dielectric loss <1% were observed for rhombohedral crystals. Tetragonal crystals with increased PbTiO3 content exhibited large thickness coupling coefficients (kT)>63% with relatively low dielectric constant (~1000). Ultrahigh values of piezoelectric coefficients (d33)>2000 pC/N were also measured for non-MPB crystals and confirmed by direct E-field strain measurements. These properties are briefly discussed in relation to device performance
Keywords :
crystal growth from solution; dielectric losses; ferroelectric materials; lead compounds; permittivity; piezoelectric materials; PbMgNbO3-PbTiO3; PbZnNbO3-PbTiO3; crystal growth; dielectric constant; dielectric loss; ferroelectric properties; flux technique; longitudinal electromechanical coupling coefficient; morphotropic phase boundary; piezoelectric coefficient; rhombohedral crystal; tetragonal crystal; thickness coupling coefficient; Crystalline materials; Crystals; Dielectric constant; Dielectric losses; Dielectric measurements; Ferroelectric materials; Niobium; Plasma temperature; Powders; Strain measurement;
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.1996.602714
