Sintering Temperature, Microstructures and Electrical Properties of (Na1/2Bi1/2)(0.94)Ba0.06Ti0.97(Mg1/3Nb2/3)(0.03)O-3 Ferroelectric Ceramic

摘要

Polycrystalline lead-free (Bi1/2Na1/2)(0.94)Ba0.06Ti(1-x)(Mg1/3Nb2/3)(x)O-3 ceramic sample with x = 0.03 was prepared using a high-temperature solid-state reaction method. X-ray diffraction analyses indicated the formation of single-phase rhombohedral structure at 950 degrees C calcinations temperature. The values of apparent particle size and lattice strain were seen to increase with the addition of 3 % of MgO & Nb2O5. Sintering was carried out at various temperatures ranging from 1100 degrees C to 1200 degrees C at 10 degrees C increase. The effects of sintering on the characteristics of the ceramic sample were investigated. Microstructure investigation revealed improved homogeneity and uniform fine grain sizes at the optimal sintering temperature. The sample sintered at 1150 degrees C has a better relative density (98 %) & electrical properties.