Optical and dielectric properties of SrMoO4powders prepared by the combustion synthesis method

Abstract

In this paper, we report on the obtention of nanocrystalline <TEX>$SrMoO_4$</TEX> synthesized through modified combustion process. These powders were characterized by X-ray diffraction, Fourier Transform Raman and Infrared Spectroscopy. These studies reveal that the scheelite-type <TEX>$SrMoO_4$</TEX> crystallizes in tetragonal structure with I41/<TEX>${\alpha}$</TEX> (N#88) space group. Transmission electron microscopy image shows that the nanocrystalline <TEX>$SrMoO_4$</TEX> powders have average size of 18 nm. The optical band gap determined from the UV-V is absorption spectra for the as prepared sample is 3.7 eV. These powders showed a strong green photoluminescence emission. The samples are sintered at a relatively low temperature of <TEX>$850^{\circ}C$</TEX>. The morphology of the sintered pellet is studied with scanning electron microscopy. The dielectric constant and loss factor values obtained at 5 MHz for a well sintered <TEX>$SrMoO_4$</TEX> pellet has been found to be 9.50 and <TEX>$7.5{\times}10^{-3}$</TEX> respectively. Thus nano <TEX>$SrMoO_4$</TEX> is a potential candidate for low temperature co-fired ceramics and luminescent applications.