STRUCTURAL AND 'DIELECTRIC PROPERTIES OF (1-x) Li2TiO3 xMgO CERAMICS PREPARED BY THE SOLID STATE REACTION METHOD

Abstract

In this study, (1-x) Li2TiO3 + xMgO (x= 0, 0.1, o.3, and 0.5) ceramic samples were prepared by the solid-state reaction method and characterized using X-ray diffraction spectra and Raman Spectroscopy. The samples sintered in air at 1000 degrees C have shown a good crystallinity situation from their XRD peaks and have a cubic pyrochlore, structure. As observed from SEM images, all samples exhibit a porous microstructure and the porosities of the 0.5Li(2)TiO(3) 0.5Mg0 sample (0.5MLTO) are smaller than those of the Li2TiO3 (LTO). According to the assignment of the Raman spectrum of Li2TiO3, peaks in the region of 700-500 cm" should be assigned to Ti O stretching vibrations in TiO6 octahedra and peaks in the region of 500-400 cm' to Li C) stretching vibrations and 0 Li-O bending vibrations. The dielectric constants of the (1.-x) Li2TiO3 + xMgO (x= 0, 0.1, 0.3, and 0.5) ceramics were studied using an impedance analyzer. The results show that the dielectric constants in the samples decrease from 23.2 to 10.6 with increasing Mg content from x= 0 to 0.5.