Electrical and Electromechanical Properties of Hot-Pressed Pb(Fe_<1/2>Nb_<1/2>)O_3 Ferroelectric Ceramics

概要

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Dense ceramics of Pb(Fe_<1/2>Nb_<1/2>)O_3 with high resistivity were fabricated below 1000℃ 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℃ and 200℃. Temperature variations of the resistivity and linear thermal expansion were also studied. At room temperature, the following values were obtained: ε^T_<33>/ε_0=2640, P_s=ll.37μC/cm^2, K_<33>=0.266, d_<33>=145×l0^<-12>C/N and S^E_<33>=12.3×10^<-12>m^2/N. These values were briefly compared with those of BaTiO_3 ceramics.
社団法人応用物理学会の論文
1993-03-15