The fluorobromozirconate glasses as X-ray storage phosphors for high spatial resolution
We found a significant PSL effect in Eu2+-doped fluorozirconate glasses which were additionally doped with Br. ions. The glasses have a composition of 53％ ZrF4, 20％ BaF3, 5％NaF, 15％NaBr, 3％ AlF3, 1.5％ LaF3, 1.5％ YF3, 1％ EuF3. The glasses were prepared by melting at 740℃ in an inert atmosphere. The samples were subsequently annealed at temperatures between 235℃ and 290℃ for various times in an inert atmosphere of nitrogen. This glass-ceramic material has potential applications as an X-ray storage phosphor. Photoluminescence (PL) and photostimulated luminescence (PSL) after x-ray irradiation was observed at room temperature. The PSL is attributed to the characteristic emission of Eu2+ present in nano-crystallites of BaBr2, which form in the glass upon annealing. The particle size increases upon annealing and so does the PSL efficiency of the glass ceramic but a decrease in transparency. The particle size was determined by transmission electron microscopy (TEM). The TEM results show a clear tendency for bigger particles for longer annealing at the expense of its number.
Xinrong Zhou Zhili Pei Dawei He Yongsheng Wang
Key Laboratory of Luminescence and Optical Information,Ministry of Education,Institute of Optoelectronic Technology,Beijing Jiaotong University,Beijing 100044,China
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）