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Author Srinivas, G. ♦ Ramesh, B. ♦ Shareefuddin, Md. ♦ Chary, M. N. ♦ Sayanna, R.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ ABSORPTION ♦ ABSORPTION SPECTRA ♦ BORATES ♦ CONCENTRATION RATIO ♦ COPPER OXIDES ♦ DOPED MATERIALS ♦ ELECTRON SPIN RESONANCE ♦ ELECTRONS ♦ EXPANSION ♦ GLASS ♦ INTERACTIONS ♦ LITHIUM OXIDES ♦ MAGNESIUM OXIDES ♦ NONLINEAR PROBLEMS ♦ OXYGEN ♦ PARAMAGNETISM ♦ POLARIZABILITY ♦ POTASSIUM OXIDES ♦ QUENCHING ♦ SPIN
Abstract The mixed alkali and alkaline earth oxide borate glass with the composition xK{sub 2}O - (25-x) Li{sub 2}O-12.5BaO-12.5MgO-50B{sub 2}O{sub 3} (x = 0, 5, 10, 15, 20 and 25mol %) and doped with 1mol% CuO were prepared by the melt quenching technique. From the optical absorption spectra the optical band gap, electronic polarizability(α{sub 0}2-), interaction parameter (A), theoretical and experimental optical basicity (Λ) values were evaluated. From the Electron Paramagnetic Resonance (EPR) spectral data the number of spins (N) and susceptibility (χ) were evaluated. The values of (α{sub 0}2-), and (Λ) increases with increasing of K{sub 2}O content and electronic polarizability and interaction parameter show opposite behaviuor which may be due to the creation of non-bridging oxygens and expansion of borate network. The reciprocal of susceptibility (1/χ) and spin concentration (N) as a function of K{sub 2}O content, varied nonlinearly which may be due to creation of non-bridging oxygens in the present glass system. This may be attributed to mixed alkali effect (MAE).
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-06
Publisher Place United States
Volume Number 1728
Issue Number 1


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