Abstract: PMN-10PT is a kind of well-known typical relaxor ferroelectrics, whose dielectrical behavior is analogous
to that of spin-glass systems. Dielectric properties were studied by adding a small amount of different dopants into PMN-10PT ceramics using the normal two-step method. When doped with Li₂O, the maximum dielectric
constant of this material is 28640, which is higher than that of pure PMN-10PT, while the degree of frequency dispersion and DPT are decreased.
When doped with CaO and Yb₂O₃, on the contrary, the opposite results will be obtained. In addition, the Raman spectra show that the degree
of B-site order of the materials is increased when doped with Li₂O and decreased when doped with Yb2O₃, respectively.

Key words:

• Pb（Mg_1/3Nb_2/3）O₃-10PbTiO₃, dielectric property, doping, B-site order