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Synthesis, structure and luminescent properties of a new Vernier phase Lu_7O_6F_9 doped by Eu^(3+) as potential scintillator with unique lath tube architecture

引用

Journal of Rare Earths 2014年第8期32卷 686-690页

作者：刘丽莎陈昊鸿刘必秋张辉唐彬冯贤娟孙志嘉赵景泰 Key Laboratory of Transparent Opto-Functional Inorganic Materials Shanghai Institute of Ceramics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of Sciences University of Science and Technology of China

To explore novel nano-scintillator with a controllable architecture, pure and Eu3＋doped lutetium oxyfluoride （Lu7O6F9） powder were synthesized by combining mild hydrothermal method and solid state calcination approach. The products were all pure orthorhombic Vernier phase demonstrated by X-ray powder diffraction （XRD）. The detailed crystal structure was also studied by Reitveld refinement. Lath-like microcrystals composed of nanoparticles with unique hollow tube of the products were supported by the images of scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. Excited by X-ray with W as the target, the pure product showed intense broad emission with the peak at about 400 nm suitable for modern photoelectric multiplier tube （PMT）, while the Eu^3＋doped sample transferred the incident energy to Eu3＋ions and gave strong ^5D0→^7Fj （j=0, 1, 2 and 4） emis-sion, which fitted for imaging and labeling measurements. From the luminescent properties, both pure and Eu^3＋-doped products are potential excellent scintillator for X-ray imaging and other high energy detectors, and the pure product is also a good host candidate for rare earth doping.

关键词： lutetium oxyfluoride hydrothermal nanocrystal scintillator rare earths

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