Electronegativity, Interaction Parameter and Electronicpolarizability for Bisumth Borate Metal Glasses

Mohammad Mohammad

doi:10.3844/pisp.2011.21.24

Abstract

Problem statement: In the present work, we applied the concept of the optical electronegativity to predict basic properties of so me ternary oxide glasses. Recently Optical electronegativity of many binary oxide glasses has been evaluated on the basis of two different parameters, the linear refractive index and the ene rgy gap, which have demonstrated remarkable correlation. Approach: In this study, the refractive indexhas beendetermi ned through the optical electronegativity and obtain a perfect linear corre lation between the calculated refractive index and the estimated values using the dielectric constant valu e of the prepared samples. Results: The average electronic oxide polarizability and the interaction parameter of our ternary oxide glasses have been estimated on the basis of the average optical elect ronegativity. Conclusion: The estimated values are in good agreement with the available experimental d ata. The present research is an improvement of the optical electronegativity determination.

Highlights

Oxide glasses take a considerable attention in view of their potential for use as laser hosts, in fiber and as nonlinear optical materials (Varshneya, 1994; Chimalawong et al, 2010).The studies on glasses of metal oxides are relatively meager due to difficulties in identifying and preparing such glasses they show interesting electronic and nonlinear optical properties (Vithal et al, 1997)
The present work pertains to some new optical parameters in thecase of some ternaryglass systems. (Dimitrov and Sakka, 1996) have shown that for simple oxides, the average electronic oxide polarizability calculated on the basis of two different properties linear refractive index and optical band-gap energy shows remarkable correlation
In the present work we examine whether their observations can be extended to glasses formed from ternary oxides glasses

Summary

INTRODUCTION

Oxide glasses take a considerable attention in view of their potential for use as laser hosts, in fiber and as nonlinear optical materials (Varshneya, 1994; Chimalawong et al, 2010).The studies on glasses of metal oxides are relatively meager due to difficulties in identifying and preparing such glasses they show interesting electronic and nonlinear optical properties (Vithal et al, 1997). Where: χ1 = The Pauling electronegativity of element ni = The number of atoms of the ith element N = The number of elements present in the compound In this connection (Reddy et al, 2001) have derived the following empirical relationship for the average electronic oxide ion polarizability as follows Eq 2: αo-2 = 4.624 - 0.7569χav (2). Reddy et al (2001) have calculated αo2for many oxides and in general there is agreement with Another optical parameter used to describe the polarizability state of the oxide ion in the simple glasses called the interaction parameter of the glass is given by previously obtained data by Dimitrov. Reddy et al (2001) and Zhao et al (2007) have applied the electronegativity approach to the same glasses already studied by

Bi 2 O 3

MATERIALS AND METHODS

DISCUSSION

CONCLUSION