Luminescence of a Transparent Alumina Ceramic Doped with Chromium and Titanium |
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| Authors: | V. S. Kiiko Yu. N. Makurin A. A. Safronov A. N. Enyashin A. L. Ivanovskii |
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| Affiliation: | (1) Ural State Technical University, Ekaterinburg, Russia;(2) Institute of Solid-State Chemistry, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia |
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| Abstract: | Specimens of transparent alumina ceramic (TAC) are prepared by slip casting. An alumina spinel, formed during sintering under vacuum or under reducing conditions, as well as individual phases, produced by thermochemical doping with chromium and titanium, are identified. The spectra of steady-state x-ray luminescence (SXL) and pulsed cathodoluminescence (PCL) and the PCL decay kinetics are studied. The highest STL and PCL intensity were observed in specimens that were prepared by thermal diffusion using a carbon + TiO2 pack. Ti-doped TAC, characterized by a rapid decay of luminescence in the UV region, can be recommended as a promising material for the detector of a scintillation dosimeter. The luminescent chromium ions (isomorphic substituents of aluminum ions in the crystal lattice) are unsuitable for that purpose because of their long luminescence de-excitation time. |
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