Spectroscopic Studies of Tungsten Ion Doped With Lead-Cadmium-Strontium-Borate Glasses


Authors : P V Vasavi, Dr. Sandya Cole

Volume/Issue : Volume 2 - 2017, Issue 7 - July

Google Scholar : https://goo.gl/ha7PyD

Scribd : https://goo.gl/ZA1CtF

Thomson Reuters ResearcherID : https://goo.gl/3bkzwv

PbO-CdO-SrO-B2O3 (PCSB) glasses doped with transition metal ion concentration with 0.1mol% WO3. These glasses are produced by normal melt quenching method. (PCSB) glasses are characterized by various physical properties, optical basicity, X-ray diffraction (XRD), Optical absorption, Electron paramagnetic resonance (EPR) and Fourier transform infrared (FT-IR) spectroscopic studies. Glass formation is recognized by X-ray diffraction spectra. The optical absorption spectra of these glasses shows a relatively small peaks at 421-436nm and 826-857nm is identified due to n–π* , dxy→dx2-y2 and dxy→ dxz, dyztransitions of W5+ ions. From the optical absorption spectral data, optical band gap (Eopt) and Urbach energy (∆E) are evaluated. From EPR spectra have the strength of the signal is decreased and then increased this is due to paramagnetic O- ion concentration in the WO3. The (FT-IR) spectral studies have described the existence of conventional BO4, B-O-B, Sr2+, Pb-O-B and W-O-B structural units of these glasses.

Keywords : Melt quenching; physical properties; optical basicity; optical absorption; X-ray diffraction; FT-IR.

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