Impedance Spectroscopy of Sodium Sulphide Added ADP Crystals

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A.P. Kochuparampil, J.H. Joshi, H.O. Jethva and M.J. Joshi, (2017). Impedance Spectroscopy of Sodium Sulphide Added ADP Crystals. Mechanics, Materials Science & Engineering,  Vol 9. doi:10.2412/mmse.4.87.814

Authors: A.P. Kochuparampil, J.H. Joshi, H.O. Jethva and M.J. Joshi

ABSTRACT. Ammonium dihydrogen phosphate (ADP) is popular nonlinear optical material with wide applications. Chalcogenide compounds are very poorly soluble in water and hence difficult to add during growth of ADP from aqueous solution to engineer and modify properties of ADP. Hence the solubility of chalcogenide compound Na2S was increased by synthesizing its nano-particles with capping agents. The growth of pure and Na2S added crystal was achieved by the slow solvent evaporation method. Complex impedance plots were recorded in the frequency range of 100 Hz to 1MHz at room temperature. Dielectric constant and loss exhibited normal behaviour with respect to frequency. The complex modulus spectra indicated effect of grain and grain boundary in pure ADP sample. From Jonscher’s plot various parameters were calculated and found to decrease for doped samples compared to pure ADP. The non Debye type relaxation was found from plots of Z” and M” versus frequency.

Keywords: slow solvent evaporation, ADP, Chalcogenide, dielectric, complex impedance, complex modulus.

DOI 10.2412/mmse.4.87.814

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