Rattikorn Yimnirun, Supon Ananta and Pitak Laoratakul

pp. 529 - 536

Abstract

In this study, the xPb(Zr_0.52Ti_0.48)O₃ - (1-x)Pb(Mg_1/3Nb_2/3)O₃ (when x = 0, 0.1, 0.3, 0.5, 0.7, 0.9, and 1.0)
ceramic composites are prepared from PZT and PMN powders by a conventional mixed-oxide method.
The dielectric properties of the ceramics are measured as functions of both temperature (-150 - 400ºC) and
frequency (100 Hz - 1 MHz). The results indicate that the dielectric properties of the pure phase PZT and
PMN are of normal and relaxor ferroelectric behaviors, respectively. The dielectric behaviors of the 0.9PZT
- 0.1PMN and 0.7PZT - 0.3PMN ceramics are more of normal ferroelectrics, while the other compositions
are obviously of relaxor ferroelectrics. In addition, the transition temperature decreases and the maximum
dielectric constant increases with increasing PMN content in the system. These results clearly show the
significance of PMN in controlling the dielectric behavior of the PZT-PMN system.

Keywords

• PZT
• PMN
• PZT-PMN
• dielectric properties