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

页码：4167 / 4171

页数：5

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