Ferroelectric Properties of Ceramics in Lead Zirconate Titanate - Lead Magnesium Niobate System

Yimnirun, R., Ananta, S. and Laoratakul, P. Dielectric properties of ceramics in lead zirconate titanate - lead magnesium niobate system Songklanakarin J. Sci. Technol., 2004, 26(4) : 529-536 In this study, the xPb(Zr 0.52 Ti 0.48 )O 3 - (1-x)Pb(Mg 1/3 Nb 2/3 )O 3 (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.

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