| This work studied the high piezoelectric and ferroelectric solid solution of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 system [abbreviated as (1-x)PMN-xPT], including the materials synthesis, phase stabilities by means of thermogravimetry/differential thermal analysis (TG/DTA), phase structure and symmetry by the conventional x-ray diffraction (XRD) and the high-resolution synchrotron x-ray diffraction.;Based on the high-resolution synchrotron x-ray diffraction analysis, a new phase diagram of the (1-x)PMN-xPT system around the morphotropic phase boundary (MPB) has been established. A monoclinic phase in the compositional range of 0.31 ≤ x ≤ 0.37 has been found. Lattice parameters are also calculated based on the synchrotron x-ray diffraction data analyses. This low temperature phase diagram will help us to properly understand the fine phase structure as well as the origin of the piezoelectric properties around the morphotropic phase boundary. (Abstract shortened by UMI.). |
