Microstructural effects on the electromechanical properties of PZT-BF ceramics

Author

Huebner, W. ; Xue, W.R. ; Lu, P.W.

Author_Institution

Dept. of Ceramic Eng., Missouri Univ., Rolla, MO, USA

fYear

1991

fDate

33457

Firstpage

150

Lastpage

153

Abstract

In this study microstructure/property relationships were explored for piezoelectric ceramics with a composition of 0.97[(Pb_0.95Sr_0.05)(Zr_0.514Ti_0.484)O₃] -0.03BiFeO₃. Very minor changes in the sintering temperature (1290-1310°C) or soak time (1.5-3.5 h) resulted in large differences in the electromechanical properties. Specifically, higher sintering temperatures resulted in no residual grain boundary phases, but larger grain sizes and/or variations in the defect structure resulted in lower permittivities, piezoelectric coefficients, and lower mechanical Q´s. The sintering time exhibited an optimal value; too short or too long resulted in poor performance. This study points clearly illustrates the difficulty in performing systematic compositional studies when the role of the microstructure can be dominant

Keywords

bismuth compounds; crystal defects; crystal microstructure; ferroelectric materials; grain size; lead compounds; permittivity; piezoceramics; piezoelectricity; sintering; stoichiometry; 1.5 to 3.5 h; 1290 to 1310 C; Pb_0.95Sr_0.05Zr_0.514Ti_0.484O₃-BiFeO₃; defect structure; electromechanical properties; grain size; mechanical Q´s; microstructure; permittivity; piezoelectric ceramics; sintering temperature; soak time; Ceramics; Dielectric constant; Dielectric losses; Dielectric measurements; Grain size; Impedance; Microstructure; Performance evaluation; Temperature; X-ray diffraction;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on

Conference_Location

University Park, PA

Print_ISBN

0-7803-1847-1

Type

conf

DOI

10.1109/ISAF.1994.522322

Filename

522322