Synthesis, structure and luminescent properties of a new Vernier phase Lu_7O_6F_9 doped by Eu~(3+) a

• 作 者: 刘丽莎 陈昊鸿 刘必秋 张辉 唐彬 冯贤娟 孙志嘉 赵景泰
• 机 构: Key Laboratory of Transparent Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, C
• 出 处: Journal of Rare Earths
• 发表日期: 2014年08期
• 关键词: luminescent controllable calcination Synthesis hollow hydrothermal refinement fi

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 Eu3+ doped sample transferred the incident energy to Eu3+ ions and gave strong 5D0→7Fj(j=0, 1, 2 and 4) emission, which fitted for imaging and labeling measurements. From the luminescent properties, both pure and Eu3+-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.

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 emission with the peak at about 400 nm suitable for modern photoelectric multiplier tube (PMT), while the Eu3 + doped sample delivered the energy to Eu3 + ions and gave strong 5D0 → 7Fj (j = 0, 1, 2 and 4) emission, which fitted for imaging and labeling measurements. From the luminescent properties, both pure and Eu3 + -doped p roducts 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.