QQ客服 官方微博 反馈留言

题名	Eu、Gd掺杂的硼硅酸盐闪烁玻璃发光性能研究
作者	唐春梅
学位类别	硕士
答辩日期	2014
授予单位	中国科学院上海光学精密机械研究所
导师	陈丹平
关键词	Eu2+ Gd3+ 闪烁发光 氧化还原
其他题名	Research on luminescence properties of Eu、Gd-doped borosilicate scintillating glass
中文摘要	闪烁体是一种将高能光子或粒子的能量转变为紫外-可见光的发光材料，在核医学诊断技术、高能物理与核物理实验、空间物理研究、工业无损检测等方面有着广泛的应用。闪烁晶体是目前研究最多、应用最广泛的闪烁材料，但是它存在着制备工艺复杂、生长周期长、成本高及生产大尺寸晶体困难等缺点，而闪烁玻璃具有制备容易、成本低、光学均匀性好、各向同性、成型加工方便、适合于批量和大尺寸工业化生产等优点，可弥补闪烁晶体的不足。本工作旨在研究Eu掺杂的高钆玻璃及Gd单掺的硼硅酸盐玻璃闪烁发光性能，并对玻璃结构进行初步测试。 论文包括五个部分：文献综述；玻璃制备及性能测试；Eu掺杂的高钆玻璃荧光及闪烁发光性能研究；Gd掺杂的硼硅酸盐闪烁玻璃发光性能研究及结论。 论文首先在文献综述部分介绍了闪烁玻璃研究进展、闪烁发光原理、发光中心的选择等基本内容。 论文第二部分叙述了本文的实验和性能测试方法。 论文第三部分分析了Eu掺杂的高钆玻璃荧光及闪烁发光性能。研究发现，在还原气氛下制备的玻璃，其光致发光以480nm为发光中心，而X射线激发的闪烁发光则以615nm为发光中心。采用红外光谱、拉曼光谱、声子边带谱对还原前后的Eu掺杂的玻璃进行结构分析，同时结合闪烁发光机理对玻璃的发光性质进行解释。 论文第四部分在空气和还原气氛下制备了一系列Gd掺杂的硼硅酸盐玻璃，对其吸收光谱、荧光寿命、光致发光、闪烁发光进行测试。应用电子顺磁共振谱对还原前后的玻璃样品进行测试，结果表明还原气氛下，Gd3+会被部分还原，玻璃中Gd3+浓度的降低导致光致发光和闪烁发光的增强。 论文最后总结了全文的实验结果，并指出了本实验中存在的不足和需要进一步研究之处。
英文摘要	Scintillator is a luminescence material which can convert the energy of high-energy photons or particles into UV/Vis photons. It has a wide range of applications in nuclear medicine diagnostic technology, high-energy physics and nuclear physics experiments, space physics research, industrial non-destructive testing. Scintillating crystal is the most studied and widely used scintillation material, but it suffers from complex preparation process, long growth cycle, high cost and hard to produce large crystals. While scintillating glass has a lot of advantages, such as easy preparation, low cost, optical uniformity, isotropic, easy molding, suitable for batch and large-size industrial production. These can make up for the weakness of scintillating crystal. This work aims to study scintillation properties of Eu doped high gadolinium glass and Gd single-doped borosilicate glass. And the structures of the glasses are measured preliminarily. Thesis consists of five sections: a literature summarization; preparation and performance test of glass; luminescence and scintillation properties of Eu-doped high gadolinium glass; scintillation properties of Gd-doped borosilicate glass; conclusion. Firstly, some basic contents like the progress of research on scintillating glass, principle of scintillation and selection of luminescence centers are introduced. In section 2, the experimental methods and associated test methods and principles are described. In section 3, luminescence and scintillation properties of Eu-doped high gadolinium glass are analyzed. Research indicates that the luminescence center of the glass prepared in reducing atmosphere shows 480nm under UV-Vis light, while the center changes to 615nm under the excitation of X-ray. Infrared spectroscopy, Raman spectroscopy, phonon sideband spectra of Eu-doped glass prepared in air or CO atmosphere are used to analysis structure. The mechanism for scintillation is combined to explain luminescence properties of the glasses. In section 4, a series of Gd-doped borosilicate glasses are prepared under air and CO experimental atmosphere. Absorption spectra, fluorescence lifetime, photoluminescence and scintillation are discussed. Electron paramagnetic resonance spectra of glass samples melted in air and CO are measured, the results show that a part of Gd3+ is reduced due to reducing atmosphere, and the corresponding photoluminescence and scintillation intensities are enhanced. Finally, conclusions are outlined, and further research is suggested. Keywords: Eu2+, Gd3+, scintillation properties, oxidation and reduction
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/16866]
专题	上海光学精密机械研究所_学位论文
推荐引用方式 GB/T 7714	唐春梅. Eu、Gd掺杂的硼硅酸盐闪烁玻璃发光性能研究[D]. 中国科学院上海光学精密机械研究所. 2014.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。