(Gd,Y,Ce)_(3)(Y_(x)Ga_(1−x))_(2)GaAl_(2)O_(12)(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 co...(Gd,Y,Ce)_(3)(Y_(x)Ga_(1−x))_(2)GaAl_(2)O_(12)(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.展开更多
Garnet ceramic scintillators are a class of inorganic scintillation materials with excellent overall performance.The flexibility of cation substitution in different lattice positions leads to tunable and versatile pro...Garnet ceramic scintillators are a class of inorganic scintillation materials with excellent overall performance.The flexibility of cation substitution in different lattice positions leads to tunable and versatile properties and a wide range of applications.This paper starts with an overview of the development history of the inorganic scintillation materials,followed by a description of major preparation methods and characterization of garnet scintillation ceramics.Great progress obtained in recent years consisting in applying the band-gap and defect engineering strategies to the garnet scintillation ceramics is reviewed.Finally,the respective problems in the preparation and performance of multicomponent garnet single crystals and ceramics and the effective solutions are discussed.The garnet scintillation ceramics with the highest application potential are summarized,and the future development directions are proposed.展开更多
基金supported by the International Partnership Program of Chinese Academy of Sciences(Grant No.121631KYSB20200039)the International Cooperation Project of Shanghai Science and Technology Commission(Grant No.20520750200)+3 种基金the National Key R&D Program of China(Grant No.2021YFE0104800)the Key Research Project of the Frontier Science of the Chinese Academy of Sciences(Grant No.QYZDB-SSW-JSC022)support of the Czech Ministry of Education,Youth and Sports under Project SOLID21 CZ.02.1.(Grant No.01/0.0/0.0/16_019/0000760)Czech Science Foundation project(Grant No.GA21-17731S)is acknowledged with thanks。
文摘(Gd,Y,Ce)_(3)(Y_(x)Ga_(1−x))_(2)GaAl_(2)O_(12)(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.
基金supported by the International Partnership Program of Chinese Academy of Sciences(Grant No.121631KYSB20200039)the International Cooperation Project of Shanghai Science and Technology Commission(Grant No.20520750200)+3 种基金the National Key R&D Program of China(Grant No.2021YFE0104800)the Key Research Project of the Frontier Science of the Chinese Academy of Sciences(Grant No.QYZDB-SSWJSC022)Partial support of the Czech Ministry of Education,Youth and Sports under Project SOLID21 CZ.02.1.(Grant No.01/0.0/0.0/16_019/0000760)Czech Science Foundation project(Grant No.GA21-17731S).
文摘Garnet ceramic scintillators are a class of inorganic scintillation materials with excellent overall performance.The flexibility of cation substitution in different lattice positions leads to tunable and versatile properties and a wide range of applications.This paper starts with an overview of the development history of the inorganic scintillation materials,followed by a description of major preparation methods and characterization of garnet scintillation ceramics.Great progress obtained in recent years consisting in applying the band-gap and defect engineering strategies to the garnet scintillation ceramics is reviewed.Finally,the respective problems in the preparation and performance of multicomponent garnet single crystals and ceramics and the effective solutions are discussed.The garnet scintillation ceramics with the highest application potential are summarized,and the future development directions are proposed.
