Abstract
The paper reviews the studies of sol-gel produced nanocrystalline γ-Al2O3 and cubic Y2O3 doped with RE3+ and TM3+ ions. The effects of spatial confinement (on nanometer scale) in optical properties of sol-gel produced insulating nanocrystalline oxide materials doped with rare earth and transition metal ions are discussed. The experimental studies showed that in insulators these effects are mostly connected with the changes in the vibrational spectrum and the increased role of the surface in nanocrystals. The transformations between the crystalline forms of Al2O3 and the properties of doped corundum ceramics are studied. The methods of sol-gel synthesis of highly dispersed nanocrystalline γ-Al2O3 and cubic Y2O3 doped with RE3+ and TM3+ ions in wide range of concentrations are described. It is shown that optical techniques are useful for characterization of sol-gel produced materials.
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Feofilov, S., Kaplyanskii, A., Kulinkin, A. et al. Sol-Gel Synthesis and Optical Studies of Rare Earth and Transition Metal Ions Doped Nanocrystalline Aluminum and Yttrium Oxides. Journal of Sol-Gel Science and Technology 21, 135–145 (2001). https://doi.org/10.1023/A:1011261431938
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DOI: https://doi.org/10.1023/A:1011261431938