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Advances in Materials Research
  Volume 1, Number 3, September 2012 , pages 191-204

Optical and dielectric properties of SrMoO4 powders prepared by the combustion synthesis method
S. Vidya, Annamma John, Sam Solomon and J.K. Thomas

    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
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

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