イッテルビウムニオブ酸鉛-チタン酸鉛-ジルコン酸鉛セラミックスの電気的性質に関する研究

概要

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In present study reports the electric properties of xPb(Yb_<1/2>Nb_<1/2>)O_3-yPbTiO_3-zPbZrO_3 ceramics, where x=0.1-0.7,y=0.2-0.7,z=0.1-0.7,and x+y+z=1,were prepared by the solid state reaction of powder materials. Ceramics, electric properties and crystal structures of the system were studied. The system is composed of three crystal phases at room temperature : the monoclinic, tetragonal and rhombohedral. Sintering of the system xPb(Yb_<1/2>Nb_<1/2>)O_3-yPbTiO_3-zPbZrO_3 is much easier than that of each terminal composition, and well sintered ceramics were obtained for the compositions near the morphotropic transformation. Piezoelectric ceramics with high dielectric constants, high radial coupling coefficient, k_r, and low mechanical quality factor were obtained for the compositions near the morphotropic transformation. Pb(Yb_<1/2>Nb_<1/2>)_<0.1>Ti_<0.5>Zr_<0.4>O_3 ceramics showd the highest k_r of 0.46.
湘南工科大学の論文
1999-03-25