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R. VIJAY1,* , B. TILAK2, P. RAMESH BABU1, D. KRISHNA RAO1
A 20A2O(A=Li, Na, K)- 20NaF- (60-x)B2O3: xMoO3 glass system with x=0 and 0.5 mol % was prepared by conventional melt quenching technique and investigated by optical absorption, ESR, and IR spectroscopies. The optical absorption spectra of 0.5 mol% exhibited a predominant broad band in the region 600-800 nm, which can be attributed the presence of MoO3 ion and also the excitation of Mo5+ (4d1) ion in the glasses. It is observed that LNBMO absorption band is more dominant when compared to the KNBMo, NNBMo. The optical band gap (Eo) has been evaluated using Urbach plots. IR studies reveal that the stretching relaxation of B-O bond, trigonal BO3, and BO4, the bending vibrations of B-O-B linkages in the borate network at different wave numbers. ESR results show that there is a co-existence of Mo5+ ions with Mo6+ ion the glass matrix. The hyperfine structure is nearly smeared out and a relatively broad line with an isotropic g values characterizes the spectra..
Molybdenum ions, Optical absorption, ESR and IR.
R. VIJAY, B. TILAK, P. RAMESH BABU, D. KRISHNA RAO, Influence of molybdenum ions on optical absorption, ESR and IR OF A2O (A=LI, NA, K)-NAF-B2O3 glass system, Optoelectronics and Advanced Materials - Rapid Communications, 6, 7-8, July-August 2012, pp.703-708 (2012).
Submitted at: May 2, 2012
Accepted at: July 19, 2012
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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