A relaxor ferroelectric material, 0.9Pb(Mg 1/3 Nb 2/3 )O 3 -0.1PbTiO 3 (0.9PMN-0.1PT) with a pyrochlore-free phase, was prepared by using one-step calcination in the present study. The 0.9PMN-0.1PT powder with the pure perovskite phase was prepared successfully from a mixture of the PMN precursor and the crystalline PT by heating for 2 h at temperatures ≥750°C. The PMN precursor was synthesized by adding an aqueous Mg(NO 3 ) 2 solution, rather than MgO, to the alcoholic slurry of PbO and Nb 2 O 5 . The 0.9PMN-0.1PT powder sintered to >96% relative density via heat treatment for 2 h at temperatures of 900°-1200°C. The highest room-temperature dielectric constant ( rt ) was 24700 at 1 kHz for the samples that were sintered at 1100°C; however, the samples that were sintered at 900°C still had rt values of 22600 at 1 kHz.
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