Dielectric properties of Pb[(Mg 1/3 Nb 2/3 ),Ti]O 3 with Bi modification

Bi(Mg 2/3 Nb 1/3 )O 3 was partially substituted into a Pb(Mg 1/3 Nb 2/3 )O 3 ⋅PbTiO 3 perovskite system and resultant changes in the phase developments and dielectric properties were investigated. Two major structures of columbite and rutile, along with a small fraction of Mg 4 Nb 2 O 9 (α-Al 2 O 3 structure), were developed in the B-site precursor system, whereas only a perovskite was observable after the addition of PbO and Bi 2 O 3 . The replacement of Bi for Pb resulted in a great reduction in the maximum dielectric constants as well as a substantial decrease in the dielectric maximum temperatures.