マグネシウムタンタル酸鉛-チタン酸鉛-ジルコン酸鉛系セラミックスの圧電特性に関する研究

概要

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In order to disclose the piezoelectric properties of Pb(Mg_<1/3>Ta_<2/3>)O_3-PbTiO_3-PbZrO_3 materials, solid solution ceramics of the system xPb(Mg_<1/3>Ta_<2/3>)O_3-yPbTiO_3-zPbZrO_3 were prepared by the solid state reaction of powder materials. Ceramic, dielectric, and piezoelectric properties and crystal structures of the system were studied. The system is composed of four crystal phases at room temperature : the cubic, pseudocubic, tetragonal and rhombohedral. Sintering of the system xPb(Mg_<1/3>Ta_<2/3>)O_3-yPbTiO_3-zPbZrO_3 is much easier than that of each end conpositions and a well sintered high density ceramics was obtained for the compositions near the morphotropic transformation. Piezoelectric ceramics with high relative dielectric constants and high radial coupling coefficient and low resonant resistance were obtained for the composition near the morphotropic transformation. The composition Pb(Mg_<1/3>Ta_<2/3>)_<0.125>Ti_<0.435>Zr_<0.44>O_3 showed the highest radial coupling coefficient.
湘南工科大学の論文
1994-03-25