• G V Ramarao

      Articles written in Bulletin of Materials Science

    • Optical properties of coloured transparent alumina gel monolith glasses

      V Saraswati G V Ramarao

      More Details Abstract Fulltext PDF

      Optical properties of transparent alumina prepared through gel process at room temperature and coloured with dopants have been studied. The absorption bands, molar absorptivity, effect of concentration and the dependence of oxidation state of copper on the copper content and water content are similar to the random network glasses. The ultraviolet absorption edge at lower energies confirm the disordered nature of the transition phase aluminasγ andδ. The absorption bands in the visible suggest the octahedral symmetry of oxygen around aluminum.

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