Dielectric and piezoelectric properties of PZT ceramics doped with strontium and lanthanum

2011-05-01
Kalem, Volkan
Çam, İbrahim
Timucin, Muharrem
PZT based piezoelectric ceramics obtained by doping with various levels of Sr2+ and La3+, designated as PSLZT, were prepared by conventional processing techniques. The effects of Sr2+ and La3+ additions, and that of the Zr/Ti ratio on microstructure, on phase constitution, and on the dielectric and piezoelectric properties were investigated. XRD data revealed that all PSLZT compositions had perovskite structure in which increasing Sr and/or decreasing Zr/Ti ratio increased the tetragonality. In PSLZT ceramics the morphotropic phase boundary (MPB) appeared as regions extending from Zr/Ti ratio of 52/48 to 58/42. Among all compositions studied, the PSLZT ceramic having 5 at% Sr2+ and 1 at% La3+ with a Zr/Ti ratio of 54/46 exhibited a peak piezoelectric strain coefficient of d(33) = 640 pC/N with attending dielectric and electromechanical parameters K-33(T) = 1800, k(p) = 0.56, Q(m) = 70, and tan delta = 1.55%. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Citation Formats
V. Kalem, İ. Çam, and M. Timucin, “Dielectric and piezoelectric properties of PZT ceramics doped with strontium and lanthanum,” CERAMICS INTERNATIONAL, vol. 37, no. 4, pp. 1265–1275, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46756.