Synthesis and Optical Properties of YAG : Ce Ceramics with a High Cerium Concentration

被引：12

作者：

Lukyashin, K. E. ^{[1
]}

Ishchenko, A., V ^{[2
]}

机构：

[1] Russian Acad Sci, Ural Branch, Inst Electrophys, Ekaterinburg 620016, Russia

[2] Yeltsin Ural Fed Univ, Ekaterinburg 620002, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2021年 / 66卷 / 08期

基金：

俄罗斯基础研究基金会;

关键词：

garnet; YAG; luminescence; scintillator; sintering; evaporation; TEMPERATURE; PHOSPHOR;

D O I：

10.1134/S0036023621080131

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Samples of YAG : Ce optical ceramics with an activator concentration of 0.5, 1, 5, and 10 at. % were synthesized by a solid-phase method. The synthesis of the samples containing 10 at. % Ce was accompanied by a significant decrease in the weight (to 11.69 wt %) and an anomalous growth of crystallites more than 2 mm in size. The effect of the type of the sintering additive and the activator concentration on the physicochemical properties of the YAG : Ce ceramics was determined. The use of silica as a sintering additive was found to require higher temperatures for the synthesis of the ceramics than the use of zirconia. The activator (cerium) in YAG was observed to behave as a sintering additive, accelerating mass-transfer processes. The luminescence properties of the synthesized samples excited by pulsed and stationary X-ray sources were studied. The relationships between the emissions of Ce3+ and Y-Al antisite defects, and between the timing performance and the concentration quenching were considered. The ceramic sample with a cerium concentration of 0.5 at. % demonstrated the maximum intensity of the Ce3+ emission band, and the sample containing 10 at. % showed the fastest luminescence response (67 ns).

引用

页码：1203 / 1211

页数：9

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