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The Harmful Effects of Sintering Aids in Pr : Lu AG Optical Ceramic Scintillator
Author(s) -
Shen Yiqiang,
Shi Yun,
Feng Xiqi,
Pan Yubai,
Li Jiang,
Zeng Yanping,
Nikl Martin,
Krasnikov Aleksei,
Vedda Anna,
Moretti Federico
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05275.x
Subject(s) - sintering , scintillation , scintillator , ceramic , transmittance , materials science , transparent ceramics , doping , mineralogy , chemistry , composite material , optics , physics , optoelectronics , detector
We investigate scintillation properties and energy trapping processes in Pr ‐doped Lu 3 Al 5 O 12 ( Pr : Lu AG ) optical ceramics, specifically focusing on the effects of sintering aids. Ceramics with good transmittance and scintillation properties comparable with those of single crystals were obtained without the use of sintering aids. Their introduction caused a transparency improvement, accompanied, however, by a deterioration of scintillation properties in terms of light yield and time decay. We interpret the results, discussing the role of aliovalent sintering agents on the formation of point defects acting as traps affecting the transport of charge carriers to the luminescence centers.