マグネシウムニオブ酸鉛-チタン酸鉛-ジルコン酸鉛系セラミックスの電気機械的活性極大の成因に関する研究

概要

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This study reports the effect of factors and the most effective factor on the electromechanical activity maximum. Study was carried out with the compositions for the binary system of (1-y) Pb (Mg_<1/3>Nb_<2/3>)O_3-yPbTiO_3 and the ternary system of 0.25 Pb (Mg_<1/3>Nb_<2/3>)O_3-yPbTiO_3-(0.75-y)PbZrO_3 with yPbTiO_3 as a parameter. The ceramic samples were prepared by the solid state reaction of powder materials. For the ceramic samples, ceramic, dielectric and piezoelectric properties were studied. In order to examine what parameter is most effective for the maximum of electromechanical activity, k_p will be compared with the calculated coupling coefficient, k^<cal>_p, which was obtained from Poisson's ratio, dielectric constant, elastic compliance, electrostrictive constant and remanent polarization. From the comparison of k_p and k^<cal>_p, the experimental results show that electromechanical avtivity maximum at the morphotropic phase boundary of Pb(Mg_<2/3>Nb_<2/3>)O_3-PbTiO_3 and Pb(Mg_<1/3>Nb_<2/3>)O_3-PbTiO_3-PbZrO_3 ceramics is caused by a maximum of relative dielectric constant.
湘南工科大学の論文
1996-03-25