By the conventional mixed oxide method (1-x)Bi(Mg1/2Ti1/2)O3xBaTiO3 ((1-x)BMTxBT, x similar to=similar to 0.2-1.0) ceramics were prepared. For x similar to=similar to 0.4, a bismuth-rich phase was observed beside the perovskite phase. For 0.5 similar to=similar to x similar to=similar to 0.92 ceramics, all the compositions belong to the pseudocubic phase, while the tetragonal phases were formed when x similar to=similar to 0.94. With the increase of BT content, a change from a relaxor-like behavior to a normal ferroelectric behavior was observed, while the change of Tmax is in the form of U curve. Furthermore, stable dielectric permittivity (15003000) and low losses (tan d similar to