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Advances in Materials Research Volume 1, Number 3, September 2012 , pages 191-204 DOI: https://doi.org/10.12989/amr.2012.1.3.191 |
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Optical and dielectric properties of SrMoO4 powders prepared by the combustion synthesis method |
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S. Vidya, Annamma John, Sam Solomon and J.K. Thomas
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| Abstract | ||
| In this paper, we report on the obtention of nanocrystalline SrMoO4 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 SrMoO4 crystallizes in tetragonal structure with I41/a (N#88) space group. Transmission electron microscopy image shows that the nanocrystalline SrMoO4 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 850oC. 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 SrMoO4 pellet has been found to be 9.50 and 7.5 | ||
| Key Words | ||
| photoluminescence; combustion synthesis; nanostructures; dielectric; band gap; sintering | ||
| Address | ||
| S. Vidya, Annamma John, and J.K. Thomas: Electronic Materials Research Laboratory, Department of Physics, Mar Ivanios College Thiruvananthapuram - 695 015, Kerala, India; Sam Solomon: Dielectric Materials Research Laboratory, Department of Physics, St. John | ||
