Effect of Tungsten on Physical and Optical Properties of Niobate Tellurite Glasses

Mohd Shafiq Bin Shaharin Shafiq Shaharin,Sib Krishna Ghoshal,Ramli Arifin

doi:10.31580/ojst.v2i1.919

Mohd Shafiq Bin Shaharin Shafiq Shaharin, Sib Krishna Ghoshal + Show 1 more

Open Access

https://doi.org/10.31580/ojst.v2i1.919

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Abstract

In the present work, three optically transparent tungsten niobate tellurite glasses with compositions of (90-x)TeO2-10Nb2O5-xWO3 (x = 0, 6, 12 mol%) were synthesized by conventional melt quenching technique. For all these three glass samples, the structural and the compositional dependence of different physical parameters such as density, molar volume and ionic packing density have been analyzed. It been observed that the amorphous nature of the samples has been confirm by X-ray diffraction analysis. The physical properties of the glasses were evaluated and the change in density ( ), molar volume ( ) and ionic packing density ( ) in these glasses indicates the effect of WO3 different content registered on the glasses structure. The highest refractive indexes value 2.171 at 632.8 nm was measured for 78TeO2â€“10Nb2O5â€“12WO3 glass. It is found that the addition of WO3 concentration to TeO2-Nb2O5 glass system increase the value of density, molar volume as well as ionic packing density. The refractive index value of the glass increase with tendency for small optical energy band gap.

Highlights

In the past two decade, tellurium oxide (TeO2) based glass have received considerable interest for their promising potential in photonics and optoelectronics field due to its unique physical, chemical and optical properties compare to other host materials such as silicate, phosphate and borate glasses
Keeping the above fact in focus, it is important to study and understand whether the nonlinear optical and other related properties that are critical for a glass such as structure and physical properties can be increased for tellurite glasses when they contain both Nb2O5 and WO3
The present study aims to determine the density, molar volume, ionic packing density, hardness, linear optical refractive index and optical band gap by varying the concentration of tungsten oxide in niobate tellurite glass

Summary

INTRODUCTION

In the past two decade, tellurium oxide (TeO2) based glass have received considerable interest for their promising potential in photonics and optoelectronics field due to its unique physical, chemical and optical properties compare to other host materials such as silicate, phosphate and borate glasses This because TeO2 offer large infrared transparency up to 6μm, high refractive index, high nonlinear refractive indices, low phonon energy, low melting temperatures and excellent as host matrix for active dopant (Gayathri Pavani, Sadhana and Chandra Mouli, 2011; Selvaraju and Marimuthu, 2013; Maheshvaran et al, 2014). Glass refractive index (n) in terms of optical band gap ( ) yields: (Gupta et al, 2017)

AND DISCUSSION XRD Analysis

CONCLUSION