Highly efficient luminescence in bulk transparent Sr2GdF7:Tb3+ glass ceramic for potential X-ray detection
Highly efficient luminescence in bulk transparent Sr2GdF7:Tb3+ glass ceramic for potential X-ray detection
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DOI：
10.1016/j.ceramint.2020.01.079
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发表时间：
2020-06
影响因子：
5.2
通讯作者：
Liming Teng;Wenna Zhang;Weiping Chen;J. Cao;Xinyuan Sun;Hai Guo
中科院分区：
文献类型：
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作者：
Liming Teng;Wenna Zhang;Weiping Chen;J. Cao;Xinyuan Sun;Hai Guo
辐射检测在各种应用中的迫切需求促进了对辐射源的广泛研究。然而，目前的晶体材料大多局限于单晶，成本高，体积有限，制造工艺耗时。本文报道了一种高效、透明的Tb 3+掺杂Sr 2GdF 7微晶玻璃（GC）的制备及其对X射线的光学响应。通过在典型的铝硅酸盐玻璃中掺入Tb 3+，在紫外和X射线激发下观察到了高强度的绿色发光。经热处理后，样品的内、外光致发光量子产率分别高达59.1%和26.4%，同时保持了较高的透光率（65%@550 nm）。更有趣的是，这种复合材料结合了氧化物玻璃和氟化物晶体的优点，呈现出强烈的X射线激发发光（XEL）。其XEL强度是商业BGO闪烁体的194%。详细的光学和结构性能表明，稀土离子激活的氟氧化物玻璃陶瓷具有低成本、高效率和强辐射发光等独特的优点，有望成为高能射线探测的替代材料。
The urgent demand for radiation detection in diverse applications boosts extensive investigations on scintillators. However, the current scintillating materials are mostly limited to mono-crystals with high cost, restricted volume and time-consuming fabrication techniques. Here, we report an efficient and transparent Tb3+-doped Sr2GdF7glass ceramic (GC) prepared via simple melt-quenching method, and its optical response to X-ray. By incorporating Tb3+into crystallized Sr2GdF7inside a typical aluminosilicate glasses, highly enhanced green emission was observed under UV and X-ray excitation. After thermal treatment, the internal and external photo-luminescence quantum yields can be as high as 59.1 and 26.4%, respectively, with the high transparency (65%@550 nm) preserved. More interestingly, this composite material, combining the advantages of oxide glasses and fluoride crystals, presents strong X-ray excited luminescence (XEL). Its XEL intensity is 194% of that of commercial BGO scintillator. Evidenced by detailed optical and structural properties, it can be concluded that rare earth ions activated bulk oxyfluoride glass ceramics with unique merits, such as low-cost, high efficiency and intense radio-luminescence, could be alternative scintillating materials for high energy ray detection.