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Research Article | Open Access

Compositional regulation of multi-component GYGAG:Ce scintillation ceramics: Self-sintering-aid effect and afterglow suppression

Danyang Zhua,b, Lexiang Wua, Alena Beitlerovac, Romana Kucerkovac, Weerapong Chewpraditkuld, Martin Niklc, Jiang Lia,b( )
Transparent Ceramics Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Institute of Physics of the Czech Academy of Sciences, Prague 16200, Czech Republic
King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand
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Graphical Abstract

Abstract

(Gd,Y,Ce)3(YxGa1−x)2GaAl2O12 (GYGAG:Ce) scintillation ceramics with different Y excess, where x = 0.005−0.08, were fabricated by the solid-state reaction method. The effects of stoichiometry on the phase composition, optical quality, and microstructure of GYGAG:Ce ceramics were analyzed. GYGAG:Ce ceramics have a pure garnet phase and obtain good in-line transmittance when x < 0.04, while more Y excess leads to the creation of the secondary phase. The change of x value influences the sintering behavior of the GYGAG:Ce ceramics: The excess of Y works as the self-sintering aid and significantly reduces the sintering temperature of ceramics. When x = 0.01–0.04, the X-ray excited luminescence (XEL) spectra and light yields of GYGAG:Ce ceramics are similar. The fast scintillation decay time and afterglow intensity of GYGAG:Ce ceramics show a slight decrease with increasing x value. Finally, additional 50–500 ppm MgO and 100–500 ppm CaO were introduced to the GYGAG:Ce ceramic with x = 0.04, and both were found to significantly increase the fast scintillation component and reduce the afterglow intensity by two orders of magnitude to 0.01% after X-ray cut-off.

Keywords

GYGAG:Ce ceramicsmulti-component garnetcompositional regulationafterglow

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Journal of Advanced Ceramics
Volume 12 Issue 10,
October 2023
Pages 1919-1929
DOI: 10.26599/JAC.2023.9220797
Cite this article:
Zhu D, Wu L, Beitlerova A, et al. Compositional regulation of multi-component GYGAG:Ce scintillation ceramics: Self-sintering-aid effect and afterglow suppression. Journal of Advanced Ceramics, 2023, 12(10): 1919-1929. https://doi.org/10.26599/JAC.2023.9220797

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Received: 18 June 2023
Revised: 27 July 2023
Accepted: 16 August 2023
Published: 25 October 2023
© The Author(s) 2023.

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