Optical, microhardness, dielectric and conductivity studies of Na2SbBF8   single organic crystal

By A. Cyrac Peter, M. Vimalan, P. Sagayaraj, J. Madhavan


Single crystals of Na2SbBF8 are grown by slow evaporation technique at ambient temperature. The improved transparency of grown crystal was investigated using UV-Vis spectral analysis. The Mechanical properties and work hardening coefficient of the grown crystal have been studied using Vickers microhardness tester. The dielectric constant constant (er) and dielectric loss (tan d) were determined as a function of frequency in the range 50 Hz to 5 MHz at different temperature. It was found that both the dielectric constant and dielectric loss decrease with increase in frequency. The electrical conductivity studies of Na2SbBF8 crystal in the temperature range 35 to 115 °C. The effects of frequency, and temperature on the electrical conductivity (sac) were studied for Na2SbBF8. Analysis of the results shows that sac increases with increase of frequency and the change in independent of temperature. The cole-cole plots indicates shift in the distribution of relaxation time.


Key Words : solution growth, UV-Vis-NIR Spectrum, microhardness, dielectric constant, and AC conductivity


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