The effect of Mg²⁺ substitution cation on structural and dielectric properties of SrTiO₃ sintered ceramics

Abstract

We have fabricated (Sr_1-xMg_x)TiO₃, (x = 0.00 & 0.3) sintered ceramics by mixed oxide route and studied the structural and microwave dielectric property of the samples with respect to variation of frequency (1 GHz to 2 GHz) using Impedance spectroscopy. This study revealed that the XRD patterns shown cubical structure along with space group (Pm-3m) while SEM images shown spherical like grains of the samples. The microwave dielectric properties of the samples vary with Mg²⁺ dopants and operating frequency as well. The distinctive absorption peak of hydroxyl vibration at 1350 cm⁻¹ was observed for both samples while hydroxyl vibrational mode was also observed only in doped sample at 3000 cm⁻¹. The microwave dielectric properties strongly depend upon Mg²⁺ contents and resonating frequency. The optimum microwave dielectric properties have been recorded which may help for the application of microwave wireless communication devices.

Keywords:

• Sr_1-xMg_xTiO₃ ceramics
• mixed oxide route
• X-ray diffraction
• dielectric studies

Acknowledgment

The authors extend their appreciation to the Research Center for Advanced Materials Science (RCAMS), King Khalid University, Saudi Arabia, for funding this work under grant number RCAMS/KKU/013-22.