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Zn<sub><sup>2+</sup></sub>掺杂对共沉淀法制备Ce:Gd<sub>3</sub>Ga<sub>3</sub>Al<sub>2</sub>O<sub>12</sub>陶瓷粉体闪烁性能的影响
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作者单位:

1.中国科学院福建物质结构研究所;2.中国科学院大学

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基金项目:

国家重点研发计划(No.2017YFB1104504 and 2016YFB0701004)


Effect of Zn<sub><sup>2+</sup></sub> codoping on scintillation and properties of Ce-doped Gd<sub>3</sub>Ga<sub>3</sub>Al<sub>2</sub>O<sub>12</sub> ceramic powder prepared by co-precipitation method
Author:
Affiliation:

Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences

Fund Project:

Natural Key Research and Development Program(No.2017YFB1104504 and 2016YFB0701004)

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    摘要:

    本文利用化学共沉淀法制备Zn<sub><sup>2+</sup></sub>共掺的Ce:GAGG陶瓷粉体。研究了Zn<sub><sup>2+</sup></sub>共掺的Ce:GAGG陶瓷前驱粉体的TG/DTA和FTIR曲线;分析了不同煅烧温度对Ce:GAGG陶瓷粉体相、形貌和颗粒度分布的影响;系统研究了Zn<sub><sup>2+</sup></sub>含量对Ce:GAGG陶瓷粉体光致发光,辐射发光,激发光谱和荧光寿命的影响。研究表明:前驱粉体在883℃的相组成为GdAlO<sub>3</sub>相和GAGG相;前驱粉体在煅烧温度为900℃时,完全转化为GAGG相;当煅烧温度为1200℃时,GAGG颗粒尺寸控制在20nm~60nm,分布均匀;随着 Zn<sub><sup>2+</sup></sub>含量的变化,光致发光和辐射发光强度也相应变化,特别的,当Zn<sub><sup>2+</sup></sub>含量为0.4mol%时,光致发光和辐射发光强度达到最大值;随着Zn<sub><sup>2+</sup></sub>掺杂含量的上升,荧光寿命出现下降的趋势。因此,Zn<sub><sup>2+</sup></sub>含量对Ce:GAGG陶瓷粉体的辐射发光具有明显的影响,对降低荧光寿命具有积极的作用,对于提高GAGG闪烁材料的快速响应具有重要意义。

    Abstract:

    Zinc codoping Gd<sub>3</sub>Ga<sub>3</sub>Al<sub>2</sub>O<sub>12</sub>:Ce (Ce:GAGG) ceramic precursors have been synthesized by chemical co-precipitation method. Thermal gravimetric and differential thermal analysis of the precursor powders are obtained, and phases including GdAlO<sub>3</sub> and GAGG are generated at 883°C. The chemical molecule of precursors is analyzed by FTIR. The phases and morphology of the precursors for different calcination temperature are studied by XRD and SEM. Precursors absolutely convert to Ce:GAGG powders at 900°C. The particles calcined at 1200°C for Ce:GAGG powders with size of 20~60nm become homogeneous and smooth. The effect of PEG on the morphology of the precursors is investigated. Particle size and size range of Ce:GAGG powders calcined at different temperatures were investigated. The influence of codoping of Ce:GAGG with different Zn<sub><sup>2+</sup></sub> content on photoluminescence, radioluminescence, excitation spectra and fluorescent lifetime are analyzed. The emission spectra of Ce:GAGG codoping 0.4% Zn<sub><sup>2+</sup></sub> content has the highest intensity. The Zn<sub><sup>2+</sup></sub> in Ce:GAGG powders has a positive effect on a fast component with short fluorescence lifetime.

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邱智华,张鲜辉,王帅华,吴少凡,林永红. Zn<sub><sup>2+</sup></sub>掺杂对共沉淀法制备Ce:Gd<sub>3</sub>Ga<sub>3</sub>Al<sub>2</sub>O<sub>12</sub>陶瓷粉体闪烁性能的影响[J].稀有金属材料与工程,2020,49(3):761~768.[Qiu Zhihua, Zhang Xianhui, Wang Shuaihua, Wu Shaofan, Lin Yonghong. Effect of Zn<sub><sup>2+</sup></sub> codoping on scintillation and properties of Ce-doped Gd<sub>3</sub>Ga<sub>3</sub>Al<sub>2</sub>O<sub>12</sub> ceramic powder prepared by co-precipitation method[J]. Rare Metal Materials and Engineering,2020,49(3):761~768.]
DOI:10.12442/j. issn.1002-185X.20180995

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  • 收稿日期:2018-09-27
  • 最后修改日期:2018-10-15
  • 录用日期:2018-11-08
  • 在线发布日期: 2020-04-08
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