Synthesis, characterization, dielectric and thermoelectric properties of calcium doped magnesium titanate Mg_(1-x)Ca_xTiO₃ (x=0.1, 0.3 & 0.5) ceramics

摘要

The Calcium D oped Magnesium Titanate ceramic materials of different co mpositions were synthesized by conventional Solid-state diffusion method. The results of XRD and microstructure analysis showed that the specimens had crystalline, homogenous and dense structures. The dielectric constant from room temperature to 350 0 C was calculated using HIOKI 3532-50 LCR HiTESTER in the frequency range of 1KHz-1MHz.In the present investigation the dielectric response of Calcium doped Magnesium titanate was studied. It showed that the dielectric constant and d ielectric loss were increased with temperature and decreased with frequency and also observed the enhancement of dielectric constant with the addition of small amo unt of Calcium to the Magnesium Titanate ceramics. The a.c. conductivity of the specimens were measured and thermoelectric properties were also studied.