Abstract
Effect of Fe substitution on the dielectric properties of Ba(Mg1/3Ta2/3)O3 system was investigated at microwave frequency. Permittivity was increased and Qf value was abruptly decreased with Fe substitution. Also electric conduction was confirmed in this system with high Fe concentration. Dielectric loss of lattice vibration obtained from far infrared spectrum could not explain the abrupt decreasing of Qf value at microwave frequency. It was discussed that the decreasing Qf value was due to increasing the electric conduction or other contribution to the materials.
