Microstructure and Optical Properties of 12CaO&middot;7Al2O3:Pr3+ Phosphors for High Quality X-ray Imaging

YAN Hong; SONG Ting; ZHANG Meng; LI Sheng-nan; YANG Jian; LIU Chun-guang; ZHU Han-cheng; YA

doi:10.3788/fgxb20183907.0895

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Microstructure and Optical Properties of 12CaO·7Al₂O₃:Pr³⁺ Phosphors for High Quality X-ray Imaging

更新时间：2020-08-12

- Microstructure and Optical Properties of 12CaO·7Al₂O₃:Pr³⁺ Phosphors for High Quality X-ray Imaging
- Chinese Journal of Luminescence Vol. 39, Issue 7, Pages: 895-902(2018)
- 作者机构：
  
  东北师范大学物理学院,吉林长春,130021
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(11674050,11374047,11604044
- DOI：10.3788/fgxb20183907.0895
  CLC： O482.31
- Received：17 December 2017，
  
  Revised：19 January 2018，
  
  Published Online：16 April 2018，
  
  Published：05 July 2018
- 稿件说明：
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闫宏, 宋婷, 张猛等. 高性能X射线影像存储12CaO·7Al2O3:Pr3+荧光粉的微结构及光学特性[J]. 发光学报, 2018,39(7): 895-902

YAN Hong, SONG Ting, ZHANG Meng etc. Microstructure and Optical Properties of 12CaO·7Al2O3:Pr3+ Phosphors for High Quality X-ray Imaging[J]. Chinese Journal of Luminescence, 2018,39(7): 895-902
闫宏, 宋婷, 张猛等. 高性能X射线影像存储12CaO·7Al2O3:Pr3+荧光粉的微结构及光学特性[J]. 发光学报, 2018,39(7): 895-902 DOI： 10.3788/fgxb20183907.0895.

YAN Hong, SONG Ting, ZHANG Meng etc. Microstructure and Optical Properties of 12CaO·7Al2O3:Pr3+ Phosphors for High Quality X-ray Imaging[J]. Chinese Journal of Luminescence, 2018,39(7): 895-902 DOI： 10.3788/fgxb20183907.0895.

摘要

采用自蔓延燃烧法制备了不同镨掺杂浓度的12CaO7Al

：Pr

（C12A7：Pr

） X射线影像存储荧光粉。在232 nm激发下，发现Pr

掺杂摩尔分数为0.3%的荧光粉位于486 nm的蓝光发射峰呈现最大的发光强度。对C12A7：0.3% Pr

样品进行真空热处理后，C12A7笼中的O

基团数量减少，同时类F

色心的空笼子的数量增多，导致陷阱数目增加和光激励发光强度增大。热释发光实验表明：C12A7：0.3% Pr

样品中存在两个深陷阱，陷阱深度分别约为0.69 eV和0.80 eV；经过真空热处理后的C12A7：0.3% Pr

荧光粉，陷阱深度变深，陷阱数目增多，光存储性能变好。当吸收的X射线剂量为5.2 Gy时，可以实现分辨率较高的X射线成像。实验结果表明，镨掺杂C12A7荧光粉在计算机X射线摄影领域有潜在的应用前景。

Abstract

X-ray storage phosphors 12CaO7Al

:Pr

(C12A7:Pr

) with different doping concentrations were synthesized by a combustion method. For C12A7:0.3%Pr

phosphor

the strongest intensity of the emission peak at 486 nm

originating from

transition of Pr

can be obtained upon 232 nm excititation. After the annealing in vacuum

the number of encaged O

anions decreased

while the amount of empty cages increased. Thus

it led to the increased number of traps and the enhanced photo-stimulable luminescence(PSL). The thermoluminescence(TL) analysis showed that there existed two deep traps in the phosphors and the trap depths were~0.69 and~0.80 eV

respectively. In particular

the annealing in vacuum led to the deeper trap depths

the increased number of traps and the improved storage properties. Upon X-ray irradiation(applied dose:5.2 Gy)

a blue image with high resolution was obtained by 808 nm stimulation. Our results suggested that the C12A7:Pr

phosphors have potential application in the field of computed radiography.

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Microstructure and Optical Properties of 12CaO·7Al2O3:Pr3+ Phosphors for High Quality X-ray Imaging

DOI：10.3788/fgxb20183907.0895

摘要

Abstract

关键词

Keywords

references

Microstructure and Optical Properties of 12CaO·7Al₂O₃:Pr³⁺ Phosphors for High Quality X-ray Imaging