PHYSICAL PROPERTIES OF LITHIUM�SODIUMBORATE GLASSES

M.D.Thombare; R.V.Joat; D.B. Thombre

Volume : VI, Issue : VIII, August - 2016

PHYSICAL PROPERTIES OF LITHIUM�SODIUMBORATE GLASSES

M. D. Thombare, R. V. Joat, D. B. Thombre

Abstract :

Glass samples of the Lithium–sodiumborate (42.5–x) Li2O–xNa2O–57.5B2O3, x=0–42.5 in the step of 4.25, were prepared by conventional melt–quench technique.. Average molecular weight, Molar volume, Interionic distance, Polaron radius increases; and Oxygen packing density, ionic concentration decreases on increasing the mol % of Na2O.Inter ionic distance & polaron radius increases. Ionic concentration & Oxygen packing density decreases on increasing the mol % of Na2O but linearly related with R2=1. Molar refractivity, Electronic polarizability, varies alike; minimum =0.629 cm3 and maximum =0.249(1024ions/cm3) at 25.5 mol % of Na2O; varies linearly with R2=0.999.Molar polarizability & Electronic polarizability varies inversely with respect to Metallization and minimum = 6.61(1024ions/cm3) & 0.249(1024ions/cm3), respectively for maximum metallization = 0.371 at same 25.5 mol % of Na2O. Refractive index & Dielectric constant, Molar refractivity & varies alike and minimum at 25.5 mol % of Na2O. The density and molar volume of glasses were determined in order to study their structure. Molar volume & density increases in reverse manner with increase in mol % of Na2O.The maximum variation of Metallization criterion is within the range of 0.274–0.574.