大尺寸硅酸铋晶体的原料合成、晶体生长及闪烁性能研究

doi:10.15541/jim20160061

无机材料学报 ›› 2016, Vol. 31 ›› Issue (10): 1147-1150.DOI: 10.15541/jim20160061

大尺寸硅酸铋晶体的原料合成、晶体生长及闪烁性能研究

徐家跃¹, 王杰¹, 陈炜¹, 肖学峰^1,2, 杨波波¹, 王占勇¹, 李飞³, 谢会东³

(1. 上海应用技术大学材料科学与工程学院, 上海201418; 2. 北方民族大学物理系, 银川 750021; 3. 西安建筑科技大学理学院, 西安710055)

收稿日期:2016-01-27 出版日期:2016-10-20 网络出版日期:2016-09-23

Synthesis, Growth and Scintillation Properties of Large Size Bi₄Si₃O₁₂ Crystals

XU Jia-Yue¹, WANG Jie¹, CHEN Wei¹, XIAO Xue-Feng^{1, 2}, YANG Bo-Bo¹, WANG Zhan-Yong¹, LI Fei³, XIE Hui-Dong³

(1. Institute of Crystal Growth, School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China; 2. Department of Fundamental Science, Beifang University of Nationalities, Yinchuan 750021, China; 3. School of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China)

Received:2016-01-27 Published:2016-10-20 Online:2016-09-23
Supported by:
National Natural Science Foundation of China (51342007, 51572175)

摘要/Abstract

摘要：

以Si(OC₂H₅)₄和Bi(NO₃)₃·5H₂O作为前驱体、柠檬酸作为溶剂, 按化学计量比配料, 采用溶胶-凝胶法合成并经高温烧结制备了纯相Bi₄Si₃O₁₂多晶粉末, 每批次可合成250 g。以此为原料、<001 >取向BSO为籽晶, 在坩埚下降炉内生长了BSO晶体, 讨论了晶体的析晶行为, 获得了30 mm × 30 mm × 210 mm的高质量BSO晶体。闪烁性能测试表明, 该晶体能量分辨率为18.9%, 光输出为同等条件下CSI(T1)晶体的7.2%。

关键词: 溶胶-凝胶法, 硅酸铋晶体, 坩埚下降法, 晶体生长, 闪烁性能

Abstract:

Using stoichiometric Si(OC₂H₅)₄ and Bi(NO₃)₃·5H₂O as precursors and citric acid as solvent, polycrystalline Bi₄Si₃O₁₂ (BSO) powders were synthesized by Sol-Gel method and sintered at high temperature. Batch production of 250 g powders was realized. Using as-synthesized BSO powders and <001>-oriented BSO seeds, BSO crystals were grown in the vertical Bridgman furnace. The crystallization behavior was discussed and high quality BSO crystal up to 30 mm × 30 mm × 210 mm was obtained. The scintillation characteristics of BSO single crystals were investigated. The energy resolution of the BSO crystal was 18.9% and the relative light yield of the crystal was 7.2% compared with CsI(Tl) at the same conditions.

Key words: Sol-Gel method, Bi₄Si₃O₁₂ crystal, vertical Bridgman method, crystal growth, scintillation property

中图分类号:

TQ174

徐家跃, 王杰, 陈炜, 肖学峰, 杨波波, 王占勇, 李飞, 谢会东. 大尺寸硅酸铋晶体的原料合成、晶体生长及闪烁性能研究[J]. 无机材料学报, 2016, 31(10): 1147-1150.

XU Jia-Yue, WANG Jie, CHEN Wei, XIAO Xue-Feng, YANG Bo-Bo, WANG Zhan-Yong, LI Fei, XIE Hui-Dong. Synthesis, Growth and Scintillation Properties of Large Size Bi₄Si₃O₁₂ Crystals[J]. Journal of Inorganic Materials, 2016, 31(10): 1147-1150.

图/表 6

Fig. 1 The transparent gel (a) and 250 g batch BSO powders (b)

Fig. 2 XRD patterns of the sintered BSO

Fig. 3 SEM images of the dried gel powders (a) and the sintered BSO polycrystalline (b)

Fig. 4 Photos of as-grown Φ28 mm crystal (a) and polished crystal up to 30 mm × 30 mm × 210 mm (b)

Fig. 5 Pulse height spectrum of the BSO crystal excited with 662 keV γ-rays from a 137Cs source (a) Energy resolution; (b) Relative light yield

Table 1 Scintillation properties of BSO crystals

Sample	Growth technique	Relative light yield	Energy resolution at 662 keV γ-rays/%	Reference
BSO	Bridgman	25	18.9	This work
BSO	Bridgman	20	31	[1]
BSO	Bridgman	25	22	[18]
BSO	Bridgman	23	18	[16]
BSO	Micro-pulling-down	21	33	[20]
BSO	Czochralski	26	22	[15]
BGO^a	Czochralski	100	16	[1]

参考文献 20

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大尺寸硅酸铋晶体的原料合成、晶体生长及闪烁性能研究

Synthesis, Growth and Scintillation Properties of Large Size Bi₄Si₃O₁₂ Crystals

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大尺寸硅酸铋晶体的原料合成、晶体生长及闪烁性能研究

Synthesis, Growth and Scintillation Properties of Large Size Bi4Si3O12 Crystals

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Synthesis, Growth and Scintillation Properties of Large Size Bi₄Si₃O₁₂ Crystals