Structural defects effect in fine-grained MgAl2O4 sintered ceramics: optical and RPE properties as function of microstructure

被引：0
|
作者：
Spiridigliozzi, Hugo [1 ]
Mercone, Silvana [2 ]
Lang, Guillaume [3 ]
Feldbach, Eduard [4 ]
Kanaev, Andrei [1 ]
Schoenstein, Frederic [1 ]
机构：
[1] Univ Sorbonne Paris Nord, CNRS, LSPM UPR 3407, F-93430 Villetaneuse, France
[2] Univ Tours, CNRS, GREMAN UMR7347, F-37200 Tours, France
[3] Univ PSL, Sorbonne Univ, CNRS, LPEM,ESPCI Paris, F-75005 Paris, France
[4] Univ Tartu, Inst Phys, EE-50411 Tartu, Estonia
来源：
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2022年 / 231卷 / 24期
关键词：
ELECTRON-SPIN-RESONANCE; TRANSPARENT MGAL2O4; CARBON CONTAMINATION; LUMINESCENCE; CRYSTAL; MN4+; IONS; MGO;
D O I：
10.1140/epjs/s11734-022-00574-x
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Transparent sintered ceramics of spinel oxides compounds have attracted a lot of attention due to their expected structural stability in extreme environments. In this work, the evolution of structural defects was observed in fine-grain transparent MgAl2O4 ceramics following consolidation of spinel powders via Spark Plasma Sintering and heat treatment under air. A dark discoloration due to a carbon contamination and partial reduction during the sintering process was suppressed via post-annealing under air. The correlated EPR and cathodoluminescence analyses showed significance of the Mn4+ ions reduction after consolidation of powders.
引用
收藏
页码：4167 / 4171
页数：5
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