Fabrication and luminescent properties of Ce:LaAlO3 translucent ceramics |
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| Affiliation: | 1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2. University of Chinese Academy of Sciences, Beijing 100039, China;1. Department of Physics, Opole University of Technology, ul. Prószkowska 76, 45-758 Opole, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-395 Wroc?aw, Poland;1. National Institute for Laser, Plasma and Radiation Physics, Laboratory of Solid-State Quantum Electronics, Bucharest R-077125, Romania;2. Doctoral School of Physics, Faculty of Physics, University of Bucharest, Bucharest, Romania |
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| Abstract: | Ce3+ doped LaAlO3 translucent ceramics were fabricated with solid-state reaction method and sintered in vacuum condition. LaAlO3 single phase was formed at 1200 °C. Their microstructures were observed and luminescent properties were investigated. The average grain size increases with the increase of sintering temperature. A dense and pore-free microstructure is displayed at 1700 °C. A band to band absorption of LaAlO3 host is round 220 nm. Three excitation peaks at 249, 317 and 354 nm were observed in the Ce3+:LaAlO3 ceramics, they were attributed to the 4f–5d transition of Ce3+ ions. The scintillation properties were investigated by X-ray excited radioluminescence in Ce3+:LaAlO3 ceramics and the emission peak is 428 nm. |
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| Keywords: | Excitation spectrum Fluorescence spectrum Radioluminescence |
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