Evaluation of the efficiency of Cr3+ → Cr4+ conversion in non-stoichiometric YAG: Cr ceramics

被引：2
作者：
Kravtsov, A. A. [1 ]
Suprunchuk, V. E. [1 ]
Lapin, V. A. [1 ]
Malyavin, F. F. [1 ]
Vakalov, D. S. [1 ]
Tarala, L. V. [1 ]
Medyanik, E. V. [1 ]
Brazhko, E. A. [1 ]
Chapura, O. M. [1 ]
Tarala, V. A. [1 ]
机构：
[1] North Caucasus Fed Univ, Pushkina St1, Stavropol 355009, Russia
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2024年 / 44卷 / 12期
关键词：
Ceramics; Stoichiometry; Valence conversion; Optical properties; YAG: Cr4+; OPTICAL-PROPERTIES; DEFECTS; IONS; CRYSTAL; STATE; LUMINESCENCE; DEVIATION;
D O I：
10.1016/j.jeurceramsoc.2024.04.078
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The aim of the work was to study the effect of the YAG: Cr ceramics' stoichiometry deviation on the optical properties and efficiency of valence conversion of Cr cations. YAG: Cr ceramic powders with deviations from stoichiometry ranging from 0.225 to -0.35 at % excess yttrium were synthesized by chemical precipitation. The optical and luminescent properties of YAG: Cr4+ ceramics, as well as the microstructure of the ceramics, were studied. It has been shown that small deviations from the stoichiometry of YAG: Cr (within 0.35 at %) do not have a significant effect on the optical transmission and microstructure of YAG: Cr3+ ceramics, but strongly affect some characteristics of YAG: Cr4+ ceramics. It was found that the presence of excess aluminum or yttrium cations in YAG: Cr4+ ceramics leads to a decrease in the concentration of Cr4+ and a deterioration in the conversion from Cr3+ to Cr4+.
引用
收藏
页码：7160 / 7169
页数：10
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