GdAlO3∶Tb3+-Al2O3有序共晶生长及其微结构研究

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (10): 1971-1978.

GdAlO₃∶Tb³⁺-Al₂O₃有序共晶生长及其微结构研究

刘芳, 刘振, 钟幸原, 钟玖平

中山大学材料学院,深圳 518107

收稿日期:2021-08-13 出版日期:2021-10-15 发布日期:2021-11-24
通讯作者: 钟玖平,博士,副教授。E-mail:zhongjp@mail.sysu.edu.cn
作者简介:刘芳(1994—),女,湖南省人,硕士研究生。E-mail:1163024515@qq.com。钟玖平(1975—),男,理学博士,中山大学材料学院副教授,博士生导师,兼任中国硅酸盐学会晶体生长与材料分会理事、中国稀土学会稀土晶体材料专业委员会委员、《人工晶体学报》第七届编委。主要研究方向为稀土光电晶体生长与发光物理、新型稀土荧光材料合成与发光性能。承担了国家自然科学基金、中国博士后科学基金、广东省科技计划项目、国际科技合作项目等科技项目,在Nanoscale、Journal of Materials Chemistry、Crystal Growth & Design、Inorganic Chemistry、Journal of Crystal Growth、Physical Review B、Journal of Physical Chemistry C等国内外刊物上发表学术论文五十余篇。
基金资助:
国家自然科学基金(21771196);江西省重点研发计划(20165ABC28010);广东省科技计划(2015A050502019);广州市科技计划(201510010296)

Growth and Microstructure of Ordered Eutectics GdAlO₃:Tb³⁺-Al₂O₃

LIU Fang, LIU Zhen, ZHONG Xingyuan, ZHONG Jiuping

School of Materials, Sun Yat-Sen University, Shenzhen 518107, China

Received:2021-08-13 Online:2021-10-15 Published:2021-11-24

摘要/Abstract

摘要： 两相有序共晶材料由于具有不同折射率的两晶相呈现有序排列,可降低荧光在共晶材料内部的散射而实现导光功能,可被应用于高分辨探测成像器件中。本工作根据定向凝固原理,用微下降法生长技术制备得到了直径为3 mm的GdAlO₃∶Tb³⁺-Al₂O₃两相有序共晶。通过SEM和元素分析,探究了GdAlO₃∶Tb³⁺-Al₂O₃共晶内部的微结构,结果显示,所得共晶中GdAlO₃∶Tb³⁺晶相均匀有序地分布于基质Al₂O₃晶相中,GdAlO₃∶Tb³⁺晶相直径的大小受生长速率的影响,速率越快,直径越小。所制备得到的GdAlO₃∶Tb³⁺-Al₂O₃有序共晶在X射线辐照下发射出明亮的绿色荧光,并在GdAlO₃∶Tb³⁺晶相中定向传播,有望被用作X射线探测成像材料,提高探测器的空间分辨率。

关键词: 有序共晶, 定向凝固, 微下降法, 辐照发光, GdAlO₃∶Tb³⁺

Abstract: Binary ordered eutectic materials which have two separated crystallographic phases with different refractive index can reduce light scattering and possess light guiding properties, which may be used in high spatial resolution imaging detectors. In this work, the ordered eutectics GdAlO₃:Tb³⁺-Al₂O₃ with a diameter of 3 mm were grown by micro-pulling-down method according to directionally solidified principle. The internal structure of obtained eutectics was determined by SEM and elemental analysis. It was found that the GdAlO₃:Tb³⁺ crystal fibers were well aligned in the matrix Al₂O₃ crystallographic phase and the diameter of GdAlO₃:Tb³⁺ crystal fibers can be adjusted by pulling-down speed during crystal growth process. The faster the pulling-down speed is, the smaller the crystal fiber becomes. At the same time, the radioluminescence properties of GdAlO₃:Tb³⁺-Al₂O₃ eutectic samples were determined. The GdAlO₃:Tb³⁺ crystal fibers can convert X-rays to green lights and the emitted green lights are transported along the fiber direction by total reflection mode, which can overcome resolution reduction caused by light scattering and have potential application for X-ray detection.

Key words: ordered eutectic, directional solidification, micro-pulling-down method, radioluminescence, GdAlO₃:Tb³⁺

中图分类号:

O782
TB34

刘芳, 刘振, 钟幸原, 钟玖平. GdAlO₃∶Tb³⁺-Al₂O₃有序共晶生长及其微结构研究[J]. 人工晶体学报, 2021, 50(10): 1971-1978.

LIU Fang, LIU Zhen, ZHONG Xingyuan, ZHONG Jiuping. Growth and Microstructure of Ordered Eutectics GdAlO₃:Tb³⁺-Al₂O₃[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(10): 1971-1978.

参考文献

[1] 徐叙瑢,苏勉曾.发光学与发光材料[M].北京:化学工业出版社,2004.
XU X R, SU M Z. Luminescence and luminescent materials [M]. Beijing: Chemical Industry Press, 2004 (in Chinese)
[2] MICHAIL C, VALAIS I, FOUNTOS G, et al. Luminescence efficiency of calcium tungstate (CaWO₄) under X-ray radiation: comparison with Gd₂O₂S∶Tb[J]. Measurement, 2018, 120: 213-220.
[3] WOO T, KIM T. Light collection enhancement of the digital X-ray detector using Gd₂O₂S∶Tb and CsI∶Tl phosphors in the aspect of nano-scale light dispersions[J]. Radiation Physics and Chemistry, 2012, 81(1): 12-15.
[4] NAGARKAR V V, GUPTA T K, MILLER S R, et al. Structured CsI(Tl) scintillators for X-ray imaging applications[J]. IEEE Transactions on Nuclear Science, 1998, 45(3): 492-496.
[5] JUNG P G, LEE C H, BAE K M, et al. Microdome-gooved Gd₂O₂S∶Tb scintillator for flexible and high resolution digital radiography[J]. Optics Express, 2010, 18(14): 14850-14858.
[6] JUNG I D, CHO M K, LEE S M, et al. Flexible Gd₂O₂S∶Tb scintillators pixelated with polyethylene microstructures for digital X-ray image sensors[J]. Journal of Micromechanics and Microengineering, 2009, 19(1): 015014.
[7] LIU F, OUYANG X P, TANG M H, et al. Scaling-induced enhancement of X-ray luminescence in CsI(Na) crystals[J]. Applied Physics Letters, 2013, 102(18): 181107.
[8] SIMON M, ENGEL K J, MENSER B, et al. X-ray imaging performance of scintillator-filled silicon pore arrays[J]. Medical Physics, 2008, 35(3): 968-981.
[9] OHASHI Y, YASUI N, YOKOTA Y, et al. Submicron-diameter phase-separated scintillator fibers for high-resolution X-ray imaging[J]. Applied Physics Letters, 2013, 102(5): 051907.
[10] YOSHIKAWA A, KAMADA K, KUROSAWA S, et al. Growth and characterization of directionally solidified eutectic systems for scintillator applications[J]. Journal of Crystal Growth, 2018, 498: 170-178.
[11] 邹征刚,彭光怀,刘芳,等.稀土共晶闪烁材料研究进展[J].中国稀土学报,2018,36(1):18-26.
ZOU Z G, PENG G H, LIU F, et al. Research progress of rare earth eutectic scintillation materials[J]. Journal of the Chinese Society of Rare Earths, 2018, 36(1): 18-26(in Chinese).
[12] WAKU Y, NAKAGAWA N, WAKAMOTO T, et al. A ductile ceramic eutectic composite with high strength at 1 873 K[J]. Nature, 1997, 389(6646): 49-52.
[13] OTSUKA A, WAKU Y, TANAKA R. Corrosion of a unidirectionally solidified Al₂O₃/YAG eutectic composite in a combustion environment[J]. Journal of the European Ceramic Society, 2005, 25(8): 1269-1274.
[14] SAI Q L, XIA C T. Tunable colorimetric performance of Al₂O₃-YAG∶Ce³⁺ eutectic crystal by Ce³⁺ concentration[J]. Journal of Luminescence, 2017, 186: 68-71.
[15] MESA M C, OLIETE P B, ORERA V M, et al. Microstructure and mechanical properties of Al₂O₃/Er₃Al₅O₁₂ eutectic rods grown by the laser-heated floating zone method[J]. Journal of the European Ceramic Society, 2011, 31(7): 1241-1250.
[16] TRNOVCOVÁ V, FEDOROV P P, BÁRTA C, et al. Microstructure and physical properties of superionic eutectic composites of the LiF-RF₃ (R=rare earth element) system[J]. Solid State Ionics, 1999, 119(1/2/3/4): 173-180.
[17] YASUI N, OHASHI Y, KOBAYASHI T, et al. Development of phase-separated scintillators with light-guiding properties[J]. Advanced Materials (Deerfield Beach, Fla), 2012, 24(40): 5464-5469.
[18] 颜欣龙,石肇基,彭晨,等.CsI-LiCl共晶材料的坩埚下降法生长与闪烁性能研究[J].人工晶体学报,2021,50(3):410-415.
YAN X L, SHI Z J, PENG C, et al. Growth and scintillation characterization of CsI-LiCl eutectic material by bridgman method[J]. Journal of Synthetic Crystals, 2021, 50(3): 410-415(in Chinese).
[19] ORIGUCHI K, YOKOTA Y, KRAL R, et al. Phase diagram of BaI₂-LuI₃ system and growth of BaI₂/LuI₃ eutectic scintillator[J]. Journal of Crystal Growth, 2020, 536: 125573.
[20] 钟玖平,刘芳. 一种具有导光结构的稀土闪烁体材料及其制备方法[P].中国:CN201710825544.5, 2017.
ZHONG J P, LIU F. One rare-earth scintillator material with light-guiding structure and it’s preparation method[P]. China: CN201710825544.5, 2017(in Chinese).
[21] KAMADA K, YASUI N, OHASHI Y, et al. Optimization of dopants and scintillation fibers’ diameter of GdAlO₃/α-Al₂O₃ eutectic for high-resolution X-ray imaging[J]. IEEE Transactions on Nuclear Science, 2018, 65(8): 2036-2040.
[22] KAMADA K, YAMAGUCHI H, YASUI N, et al. Development of large size crystal growth technology of oxide eutectic scintillator and a proto-type Talbot-Lau imaging system[J]. Japanese Journal of Applied Physics, 2021, 60(SB): SBBK04.

GdAlO₃∶Tb³⁺-Al₂O₃有序共晶生长及其微结构研究

Growth and Microstructure of Ordered Eutectics GdAlO₃:Tb³⁺-Al₂O₃

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 11

编辑推荐

Metrics

本文评价

[1]	邹征刚, 刘振, 龚国亮, 孙益坚, 温和瑞, 钟玖平. Ce³⁺∶GdLu₂Al₅O₁₂/Al₂O₃共晶微结构及其发光性能[J]. 人工晶体学报, 2021, 50(10): 1963-1970.
[2]	韩博;李进;安百俊. 石墨坩埚厚度对感应加热制备太阳能级多晶硅影响的数值模拟研究[J]. 人工晶体学报, 2020, 49(10): 1904-1910.
[3]	王晨东;左然;苏文佳. 多晶硅铸锭生长过程热应力与位错的数值模拟研究[J]. 人工晶体学报, 2018, 47(5): 894-898.
[4]	刘志辉;罗玉峰;龚洪勇;饶森林;张发云;胡云. 降温速率对升级冶金硅定向凝固生长多晶硅少子寿命的影响[J]. 人工晶体学报, 2017, 46(1): 13-17.
[5]	何秋湘;李京伟;孙继飞;白枭龙;熊震;陈健. 掺Sn对定向凝固多晶硅位错及少子寿命的影响[J]. 人工晶体学报, 2016, 45(6): 1458-1464.
[6]	罗玉峰;刘杰;张发云;饶森林;胡云. 勾形磁场下多晶硅定向凝固模拟与分析[J]. 人工晶体学报, 2016, 45(1): 110-114.
[7]	朱徐立;洪永强. 非均匀热场条件下多晶硅定向凝固研究[J]. 人工晶体学报, 2015, 44(8): 2260-2265.
[8]	朱徐立;洪永强. 一种热量补偿结构在多晶硅定向凝固设备中的应用研究[J]. 人工晶体学报, 2014, 43(7): 1626-1634.
[9]	郭太明;李晨希. 定向凝固过程中的不规则固液界面形貌[J]. 人工晶体学报, 2003, 32(5): 495-501.
[10]	常国威;袁军平;王自东;吴春京;胡汉起. 电渣感应连续定向凝固过程温度场计算与实验研究[J]. 人工晶体学报, 1999, 28(2): 182-187.
[11]	蔡英文;俞露;许振明;李建国;傅恒志. 定向凝固界面速率对机械牵引速率的响应[J]. 人工晶体学报, 1998, 27(2): 141-145.