Dielectric and Electrical Properties of Lead Cadmium Zirconate Titanate Ceramics

摘要

A new PZT based material, lead cadmium zirconate titanate (PCZT), was prepared by using solid state reaction method. Systematic study on dielectric and electrical properties of PCZT ceramics has been done by modifying PZT with cadmium in various amounts of 5%, 10% and 15%. Dielectric studies showed that compounds exhibit phase transition generally observed in normal ferroelectric material. Curie temperature (T_c) values of modified PZT samples were less compared to T_c value of pure PZT. Except at 1 kHz frequency, all samples have low tangent loss up to 350°C at all remaining frequencies. Resistivity of every sample is decreased due to temperature effect. Presence of bulk and grain boundary effects in all samples were shown by Nyquist plot, and bulk effect in material is confirmed through modulus spectrum. Impedance studies have indicated semiconductor behavior of PCZT ceramics. Non-Debye electrical relaxation process occurred in material and conduction mechanism is found to be thermally activated process.