Luminescence and scintillation properties of Lu3Al5O12 nanoceramics sintered by SPS method

Jan Pejchal; Vladimir Babin; Alena Beitlerova; Romana Kucerkova; Dalibor Panek; Jan Barta; Vaclav Cuba; Akihiro Yamaji; Shunsuke Kurosawa; Eva Mihokova; Akihiko Ito; Takashi Goto; Martin Nikl; Akira Yoshikawa

doi:10.1016/j.optmat.2016.01.024

Luminescence and scintillation properties of Lu₃Al₅O₁₂ nanoceramics sintered by SPS method

Jan Pejchal, Vladimir Babin, Alena Beitlerova, Romana Kucerkova, Dalibor Panek, Jan Barta, Vaclav Cuba, Akihiro Yamaji, Shunsuke Kurosawa, Eva Mihokova, Akihiko Ito, Takashi Goto, Martin Nikl, Akira Yoshikawa

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Ce-doped lutetium aluminum garnet Lu₃Al₅O₁₂ (LuAG) nanoceramics were fabricated at 1600°C and 1700°C by spark-plasma sintering (SPS) method from nano-powders prepared by radiation synthesis. Both undoped and Ce-doped LuAG ceramic samples were also prepared from the nano-powders at 1700°C with significantly increased pre-heating rate. The backscattered electron images revealed large amount of pores in all the Ce-doped samples causing their significant opacity. On the other hand, very large grains and no pores were revealed in the undoped sample, which was the only transparent one. The radioluminescence measurements revealed superior overall scintillation efficiency of the samples sintered at the temperature 1700°C, and their defect emission in the UV region was ascribed to oxygen-vacancy-related defects such as F⁺ centers. The photoluminescence decay of the defect emission was characterized by an extremely fast decay time of a few nanoseconds. Influence of sintering procedure and subsequent annealing on the luminescence and scintillation properties is discussed.

Original language	English
Pages (from-to)	54-63
Number of pages	10
Journal	Optical Materials
Volume	53
DOIs	https://doi.org/10.1016/j.optmat.2016.01.024
Publication status	Published - 2016 Mar 1

Keywords

Ce-doping
Lutetium-aluminium-garnet
Nanoceramics
Scintillator
Spark-plasma-sintering

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Computer Science(all)
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

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10.1016/j.optmat.2016.01.024

Cite this

Luminescence and scintillation properties of Lu₃Al₅O₁₂ nanoceramics sintered by SPS method. / Pejchal, Jan; Babin, Vladimir; Beitlerova, Alena; Kucerkova, Romana; Panek, Dalibor; Barta, Jan; Cuba, Vaclav; Yamaji, Akihiro ; Kurosawa, Shunsuke; Mihokova, Eva; Ito, Akihiko; Goto, Takashi; Nikl, Martin; Yoshikawa, Akira.

In: Optical Materials, Vol. 53, 01.03.2016, p. 54-63.

Research output: Contribution to journal › Article › peer-review

Pejchal, Jan ; Babin, Vladimir ; Beitlerova, Alena ; Kucerkova, Romana ; Panek, Dalibor ; Barta, Jan ; Cuba, Vaclav ; Yamaji, Akihiro ; Kurosawa, Shunsuke ; Mihokova, Eva ; Ito, Akihiko ; Goto, Takashi ; Nikl, Martin ; Yoshikawa, Akira. / Luminescence and scintillation properties of Lu₃Al₅O₁₂ nanoceramics sintered by SPS method. In: Optical Materials. 2016 ; Vol. 53. pp. 54-63.

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abstract = "Ce-doped lutetium aluminum garnet Lu3Al5O12 (LuAG) nanoceramics were fabricated at 1600°C and 1700°C by spark-plasma sintering (SPS) method from nano-powders prepared by radiation synthesis. Both undoped and Ce-doped LuAG ceramic samples were also prepared from the nano-powders at 1700°C with significantly increased pre-heating rate. The backscattered electron images revealed large amount of pores in all the Ce-doped samples causing their significant opacity. On the other hand, very large grains and no pores were revealed in the undoped sample, which was the only transparent one. The radioluminescence measurements revealed superior overall scintillation efficiency of the samples sintered at the temperature 1700°C, and their defect emission in the UV region was ascribed to oxygen-vacancy-related defects such as F+ centers. The photoluminescence decay of the defect emission was characterized by an extremely fast decay time of a few nanoseconds. Influence of sintering procedure and subsequent annealing on the luminescence and scintillation properties is discussed.",

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AU - Babin, Vladimir

AU - Beitlerova, Alena

AU - Kucerkova, Romana

AU - Panek, Dalibor

AU - Barta, Jan

AU - Cuba, Vaclav

AU - Yamaji, Akihiro

AU - Kurosawa, Shunsuke

AU - Mihokova, Eva

AU - Ito, Akihiko

AU - Goto, Takashi

AU - Nikl, Martin

AU - Yoshikawa, Akira

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AB - Ce-doped lutetium aluminum garnet Lu3Al5O12 (LuAG) nanoceramics were fabricated at 1600°C and 1700°C by spark-plasma sintering (SPS) method from nano-powders prepared by radiation synthesis. Both undoped and Ce-doped LuAG ceramic samples were also prepared from the nano-powders at 1700°C with significantly increased pre-heating rate. The backscattered electron images revealed large amount of pores in all the Ce-doped samples causing their significant opacity. On the other hand, very large grains and no pores were revealed in the undoped sample, which was the only transparent one. The radioluminescence measurements revealed superior overall scintillation efficiency of the samples sintered at the temperature 1700°C, and their defect emission in the UV region was ascribed to oxygen-vacancy-related defects such as F+ centers. The photoluminescence decay of the defect emission was characterized by an extremely fast decay time of a few nanoseconds. Influence of sintering procedure and subsequent annealing on the luminescence and scintillation properties is discussed.

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