Shape-Controlled Crystal Growth of Y3Al5O12:Ce Single Crystals with Application of Micro-Pulling-Down Method and Mo Crucibles, and Their Scintillation Properties

The technology to grow single crystals of the required shape directly from a melt has been researched extensively and developed in various industries and research fields. In this study, a micro-pulling-down method and a Mo crucible were applied to the shape-controlled crystal growth of Y3Al5O12:Ce (...

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Bibliographic Details
Published inCrystals (Basel) Vol. 12; no. 9; p. 1215
Main Authors Yoshino, Masao, Kotaki, Atsushi, Yokota, Yuui, Horiai, Takahiko, Yoshikawa, Akira
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2022
Subjects
Blood vessels
Crucibles
Crystal growth
Crystal pulling
micro-pulling-down method
Mo crucibles
Radiation
Scintillation
scintillator materials
shape-controlled crystal growth
Single crystals
Spectrum analysis
Yttrium-aluminum garnet
Japan
Germany
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Summary:The technology to grow single crystals of the required shape directly from a melt has been researched extensively and developed in various industries and research fields. In this study, a micro-pulling-down method and a Mo crucible were applied to the shape-controlled crystal growth of Y3Al5O12:Ce (YAG:Ce). Three types of Mo crucibles with different die shapes were developed. Stable crystal growth of more than 50 mm in length was achieved with the same shape as the die, and scintillation light output of ~20,000 ph/MeV, which is comparable with those of the YAG:Ce crystal grown by Cz method, were obtained. The transmittance of grown crystals above 500 nm was above 70%. The standard deviation (σ) of the scintillation light output at each position of the 50-mm-long sample was found to be within ±16%.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst12091215