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Lu2Si2O7∶Ce纳米晶的溶胶-凝胶法合成和闪烁性能
Sol-gel Synthesis and Scintillation Properties of Lu2Si2O7∶Ce Nanocrystalline
- 发光学报 2020年41卷第4期 页码：364-370
- 作者机构：
1. 上海大学 材料科学与工程学院 上海,200444
2. 嘉兴学院南湖学院,浙江 嘉兴,314001
3. 同济大学 物理科学与工程学院 上海,200092
- 作者简介：
- 基金信息：国家自然科学基金（11475128，11675121，11905122）();嘉兴市科技计划（2017AY13015）资助项目()
DOI：10.3788/fgxb20204104.0364
中图分类号： O482.3纸质出版日期：2020-4-5，
网络出版日期：2020-2-18，
收稿日期：2020-1-3，
修回日期：2020-1-22，
扫 描 看 全 文
李乾利, 胡亚华, 马玉彬等. Lu<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>∶Ce纳米晶的溶胶-凝胶法合成和闪烁性能[J]. 发光学报, 2020,41(4): 364-370
LI Qian-li, HU Ya-hua, MA Yu-bin etc. Sol-gel Synthesis and Scintillation Properties of Lu<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>∶Ce Nanocrystalline[J]. Chinese Journal of Luminescence, 2020,41(4): 364-370
李乾利, 胡亚华, 马玉彬等. Lu<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>∶Ce纳米晶的溶胶-凝胶法合成和闪烁性能[J]. 发光学报, 2020,41(4): 364-370 DOI： 10.3788/fgxb20204104.0364.
LI Qian-li, HU Ya-hua, MA Yu-bin etc. Sol-gel Synthesis and Scintillation Properties of Lu<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>∶Ce Nanocrystalline[J]. Chinese Journal of Luminescence, 2020,41(4): 364-370 DOI： 10.3788/fgxb20204104.0364.
摘要
采用溶胶-凝胶法制备了Lu
2
Si
2
O
7
∶Ce纳米晶，利用X射线衍射（XRD）、扫描电镜（SEM）、荧光光谱仪、X射线激发发射谱仪对制备的Lu
2
Si
2
O
7
∶Ce纳米晶的晶相结构、微观形貌和光学性能进行了表征。结果表明，溶胶-凝胶法制备的Lu
2
Si
2
O
7
∶Ce前驱体在煅烧温度为1 000℃时开始晶化，晶粒尺寸随着煅烧温度的升高而变大，1 200℃煅烧2 h后的晶体颗粒均匀，分散性最优，平均晶粒尺寸约为28.9 nm，呈近球形；Lu
2
Si
2
O
7
∶Ce纳米晶的紫外吸收谱存在峰位分别为304 nm和350 nm两个吸收峰，源自于Ce
3+
离子的4f5d跃迁；光致发射谱和X射线激发发射谱都表现为典型的非对称双峰结构，归属于Ce
3+
离子的5d
1
2
F
5/2
和5d
1
2
F
7/2
跃迁，Ce
3+
离子的最佳掺杂浓度约为1%；荧光衰减时间约为37.2 ns，可满足高时间分辨X射线探测需要。
Abstract
Cerium-doped lutetium pyrosilicate Lu
2
Si
2
O
7
∶Ce nanocrystalline was synthesized by the sol-gel method. The structure
morphologies and scintillation properties of Lu
2
Si
2
O
7
∶Ce nanocrystalline were characterized by X-ray diffractometer (XRD)
scanning electron microscope (SEM)
photoluminescence and X-ray excited luminescence. The results indicate that Lu
2
Si
2
O
7
∶Ce starts to crystallize at about 1 000 ℃ and the crystallite size increases with the increasing calcining temperature. Well dispersed
homogeneous and near-spherical Lu
2
Si
2
O
7
∶Ce powder with an average grain size about 28.9 nm was obtained after sintering at 1 200 ℃ for 2 h. The excitation spectrum consists of two intense broad bands at 304 nm and 350 nm
which are corresponding to the 4f5d transition of Ce
3+
ions. The emission peak under 350 nm and X-ray excitation both exhibit a typical asymmetric peak
which are attribute to 5d
1
2
F
5/2
and 5d
1
2
F
7/2
transition of the Ce
3+
ions. The optimized doping concentration of Ce
3+
ion is about 1%. The decay time of the as-prepared Lu
2
Si
2
O
7
∶Ce phosphor is about 37.2 ns
which can satisfy the requirement of the X-ray detection with high time resolution.
关键词
闪烁材料Lu2Si2O7∶Ce纳米晶溶胶-凝胶法荧光光谱X射线探测
Keywords
scintillation materialsLu2Si2O7∶Ce nanocrystallinesol-gel methodphotoluminescenceX-ray detection
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