Optical properties of coloured transparent alumina gel monolith glasses

Abstract

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 aluminas 7 and 6. The absorption bands in the visible suggest the octahedral symmetry of oxygen around aluminum.

Synthesis and surface characterization of yttrium doped boehmite nanofibers

“…nanocrystal shape and surfactants in the growth solution [18]. Recently, considerable work is available on the optical properties of transition metal ion doped bulk alumina [19][20][21], while to our best knowledge, little work has been undertaken on the doping of boehmite nanostructure. Iron and gallium doped 1D boehmite nanostructures have been systematically studied in our early work [22,23].…”