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Microwave hydrothermal growth of Y2O3 crystallites results in needle-shaped aggregates of μm length. Thermal treatment has little influence on the material microstructure, but significant impact on the nanometric level. Nanoparticles doped with europium show an intense red luminescence, related to the 5D0→7F2 transition of Eu3+ ions. The luminescence intensity increases with the calcination temperature...
Thermally induced crystallization of cubic Eu2O3 obtained with the microwave hydrothermal method has been investigated. The starting material crystallized in the form of needle-shaped agglomerates of nanocrystalline hexagonal Eu(OH)3. Thermal treatment up to 800°C induced the crystallization of cubic Eu2O3, after further calcination at 1200°C in the air a monoclinic phase appeared. The phase transformation...
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