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      https://www.ias.ac.in/article/fulltext/boms/029/04/0365-0370

    • Keywords

       

      Glass transition temperature; EPR; optical absorption; glasses; bonding parameters.

    • 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.

    • Author Affiliations

       

      N Srinivasa Rao1 M Purnima1 Shashidhar Bale1 K Siva Kumar1 Syed Rahman1

      1. Department of Physics, Osmania University, Hyderabad 500 007, India
    • Dates

       
  • Bulletin of Materials Science | News

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