Effects of Various Precursor Process Routes on the Properties of Lead-Based Ferroelectric Ceramics in PFN-PMN Binary System

Abstract

Abstract: The binary system of Pb(Fe_1/2Nb_1/2)O₃(PFN)--Pb(Mg_1/3Nb_2/3)O₃(PMN) was investigated into the effects of different precursor process routes on the
microstructrure and dielectric properties by using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy
dispersion spetrometer (EDS) and dielectric measurements. It is concluded that for the binary system (1-x)PFN-xPMN, the change of Curie temperature is
approximately linear with respect to PMN content in the range of interest (x=0-0.5). With the increase of x, the Curie points shift to lower temperatures. And the
dielectric maximum (ε_max) decreases with increasing x. Both calcining and sintering conditions have non-negligible influence on microstructure
and dielectric properties. Dielectric and other properties were compared for samples prepared by single-step and two-step precalcination route and the possible mechanisms
leading to the differences were discussed.

Key words: PFN, PMN, precursor, binary system, microstructure, dielectric property

CLC Number:

TM282

YU You-Hua,FENG Chu-De,YANG Yi,LI Cheng-En,YAN Hai-Xue. Effects of Various Precursor Process Routes on the Properties of Lead-Based Ferroelectric Ceramics in PFN-PMN Binary System[J]. Journal of Inorganic Materials.

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