Microstructure and Dielectric Properties of Sr0.4Ca0.6 La4Ti5O17 Ceramics Doped ZnO

Abstract

The purpose of this research is study the microstructure and dielectric properties of Sr0.4Ca0.6 La4Ti5O17ceramics doped ZnO which were prepared by mixed oxide method. The ceramics were sintered at the temperature of 1,400 oC for 3 hours. The thermo gravimetric and differential thermal analysis (TGA-DTA) were employed study the suitable condition for sintering. Microstructure examination was performed by using x-rays diffraction (XRD) technique and scanning electron microscopy (SEM). Furthermore, the dielectric properties were studied and characterized. It was found that the single phase is SrTiO3 for 3% mol of doped ZnO ceramic. The ceramic has the cubic crystal structure and the average of grain size equal to 0.99m. Moreover, It was found that the curie temperature was in the range of 629 - 682 oCwith maximum value of dielectric constant value equal to 117.52 and minimum dielectric loss value equal to 0.002 for 2% mol of doped ZnO ceramic.