Abstract

Effect of the homogenization medium on the dielectric properties of BaTiO3 ceramics were investigated by solid-state reaction using distilled water, methanol, and acetone. Homogenization medium dramatically changed the microstructure of BaTiO3 ceramics resulting in significant effect on electrical properties. Depending on the homogenization medium, the sinterization process led directly to normal and/or abnormal grain growth of the samples. The structure and morphologic properties of BaTiO3 ceramics were characterized using X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The complex permittivity and complex electric modulus of the ceramics were studied in a wide frequency range of 100μHz-20MHz at room temperature. BaTiO3 ceramics have a relaxation time with different mean time constant called Maxwell-Wagner-Sillars (MWS) type relaxation. Results of permittivity and resistivity measurements showed that using water instead of acetone and methanol have a positive effect on electrical properties of barium titanite ceramics with small dielectric loss.

Keywords: Homogenization medium; Agglomeration/agglomerates; Barium titanite; Grain growth; Dielectric materials/properties