![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
This paper 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(Mg1/3Nb2/3)O3-yPbTiO3 and the ternary system of 0.25Pb(Mg1/3Nb2/3)O3-yPbTiO3-(0.75 – y)PbZrO3 with yPbTiO3 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, kp will be compared with the calculated coupling coefficient, kp cal, which was obtained from Poisson's ratio, dielectric constant, elastic compliance, electrostrictive constant and remanent polarization. From the comparison of kp and kp cal, the experimental results show that electromechanical activity maximum at the morphotropic phase boundary of Pb(Mg1/3Nb2/3)O3-PbTiO3 and Pb(Mg1/3Nb2/3)O3-PbTiO3-PbZrO3 ceramics is caused by a maximum of relative dielectric constant.