1. Spectroscopic investigations of Cu2+ in Li2O--Na2O--B2O3--Bi2O3glasses.
- Author
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Rao, N. Srinivasa, Purnima, M., Bale, Shashidhar, Kumar, K. Siva, and Rahman, Syed
- Subjects
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SPECTRUM analysis , *COPPER , *GLASS , *PROPERTIES of matter , *GLASS transition temperature , *MOLECULAR spectroscopy , *EXCITON theory - Abstract
Pure and copper doped glasses with composition, xLi2O-(40-x)Na2O-50B2O3 -10Bi2O3, have been prepared over the range 0 ≤ x ≤ 40. The electron paramagnetic resonance (EPR) spectra of Cu2+ ions of these glasses have been recorded in the X-band at room temperature. Spin Hamiltonian parameters have been calculated. The molecular bonding coefficients, α2+ and β2+, have been calculated by recording the optical absorption spectra in the wavelength range 200--1200 nm. It has been observed that the site symmetry around Cu2+ ions is tetragonally distorted octahedral. The density and glass transition temperature variation with alkali content shows non-linear behaviour. The IR studies show that the glassy system contains BO3 and BO4 units in the disordered manner. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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