STUDY OF GLASS FORMERS ON BASICS OF OPTICAL ELECTRONEGATIVITY

STUDY OF GLASS FORMERS ON BASICS OF OPTICAL ELECTRONEGATIVITY

D.B.Thombre

Ex. Associate Professor, Department of Physics, Jagdamba Mahavidyalaya, Achalpur City, India
---------------------------------------------------------------------***---------------------------------------------------------------------

Abstract - Concept of electronegativity is used by so many researchers to study Refractive index, Band energy, Dielectric constant, Metallization criterion, Basicity, Oxide ion polarizability, Bond ionicity, Third order non-linear optical susceptibility to study so many glass systems. Here the concept of optical electronegativity is used to study these parameters in glass formers. It is observed that on decreasing the values of optical electronegativity; optical band energy, metallization criterion, and bond ionicity decreases; where as optical dielectric constant, optical basicity, oxide ion polarizability refractive index and third order non linear optical susceptibility increases. All glass forming oxides are according to Pauling's packing rule, Goldschmidt radius ratio rule, Zachariasen's random network theory and rules for formation of glass and Sun’s single bond strength theory. For glass formers radius ratio rc/ra = 0.14-0.40, [except P2O5] and single bond strength greater than 90 Kcal/mol.

Key Words: Band energy, Basicity, Optical dielectric constant, Oxide ion polarizability, Refractive index.