Ferroelectric and Antiferroelectric Properties of Solid-Solution Ceramics Ba(Ca_<1/3>Nb_<2/3>)O_3-PbZrO_3

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Studies have been conducted regarding the solid solution of the binary system Ba(Ca_<1/3>Nb_<2/3>)O_3-PbZrO_3, as part of a series of investigations on the ternary system of the transparent ferroelectric ceramics Ba(Ca_<1/3>Nb_<2/3>)O_3-PbZrO_3-PbTiO_3. First, the crystal structure of the complex compound Ba(Ca_<1/3>Nb_<2/3>)O_3 at room temperature was determined; it has a cubic disordered perovskite structure with the lattice constant a=4.185 Å. Then, for the system of xBa(Ca_<1/3>Nb_<2/3>)O_3(1-x)PbZrO_3, lattice constants, dielectric constants, electromechanical coupling factors, spontaneous polarization and thermal expansion were measured as a function of temperature for varying x(x=0-0.1). From these results, successive phase transitions from the paraelectric through the ferroelectric to the antiferroelectric phase were found. Finally, the diffuse phase transition for the composition x>0.05 was discussed.
社団法人応用物理学会の論文
1993-10-15