Decrease of loss in dielectric properties of TbMnO3 by adding TiO2

Low-frequency (10²-10⁵ Hz) dielectric properties of TbMnO₃+xTiO₂ (x=0.33, 1, 3) ceramic composites, which were fabricated by conventional solid-state reaction, were investigated from 360 to 77 K. Very high dielectric constants and interesting temperature dependence of the dielectric properties were observed in the present composite ceramics. When compared to the high dielectric loss of the polycrystalline TbMnO₃, the loss of TbMnO₃+xTiO₂ (x=0.33, 1, 3) decreased with the increasing TiO₂. Especially for TbMnO₃+1TiO₂, the dielectric loss decreased remarkably, while the dielectric constant was still very high, which are more favorable for practical applications.