La-, K- and Nb-doped 0.90(Bi0.5Na0.5TiO3)–0.10PbTiO3

Lanthanum, Potassium and Niobium have been selected as cation dopants to modify the relaxor characteristics of 0.90(Bi0.5Na0.5TiO3)–0.10PbTiO3. The experimental results show that La lowers the phase transition temperatures and decreases the grain size. In contrast, the grain size of K-doped composition tends to increase. Furthermore, the maximum of dielectric permittivity and the Curie temperature increase as compared to those of La-doped material. La can improve the broadness of dielectric permittivity of 0.90(Bi0.5Na0.5TiO3)–0.10PbTiO3. However, Nb is a better promising dopant for enhancing the relaxor behavior for this composition.