Abstract
Dense ceramics of Pb(Fe1/2Nb1/2)O3 with high resistivity were fabricated below 1000°C by making use of the hot-pressing technique. For these hot-pressed specimens, measurements of the spontaneous polarization, dielectric constants, electromechanical coupling factors, piezoelectric constants and elastic compliance constants were carried out as a function of temperatures between -30°C and 200°C. Temperature variations of the resistivity and linear thermal expansion were also studied. At room temperature, the following values were obtained: ε33T/ε0=2640, Ps=11.3 µC/cm2, k33=0.266, d33=145×10-12 C/N and s33E=12.3×10-12 m2/N. These values were briefly compared with those of BaTiO3 ceramics.
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