Electrical properties of Pb2Bi3NdTi5O18 ceramic

Single phase orthorhombic tungsten–bronze (OTB) ceramics of Pb2Bi3NdTi5O18 (PBNT) were prepared by a high temperature solid-state reaction method. Electrical impedance, phase angle, dielectric constant and dielectric loss have been measured in the frequency range 0.1 kHz–3 MHz in the temperature region 16–250 °C. Dielectric studies show relaxor behaviour with a diffuse phase transition having diffusivity parameter value 1.85. AC impedance analyses suggested the phase element to be capacitive. The Cole–Cole plot indicated high resistance of the sample at room temperature. The activation energy (Ea=0.63 eV) has been estimated from the temperature variation of DC resistivity.