New ferroelectric materials on the basis of PbSc1/2Nb1/2O3–PbLu1/2Nb1/2O3 solid solutions

Original binary solid solutions PbSc1/2Nb1/2O3–PbLu1/2Nb1/2O3 (PSN-PLuN) have been produced. First of all nominally pure PSN and PLuN were synthesized by solid state reaction from oxides and carbonates. These compounds were mixed in different proportions to obtain (1−x)PSN−xPLuN solid solutions. Ceramic samples were hot-pressed at gradual change of the temperature. Solid solutions have the perovskite structure and are completely soluble in each other. Differential thermal analysis and X-ray diffraction were used to examine the synthesis and phase constitution. Dielectric properties—dielectric permittivity ε and dielectric loss tanδ of ceramic samples of originally synthesized PbSc1/2Nb1/2O3–PbLu1/2Nb1/2O3 (PSN−PLuN) solid solution series were measured as functions of temperature. In (1−x)PSN−xPLuN solid solutions the phase transition temperature drops at small values x further proceeding through a minimum.