https://doi.org/10.1140/epjs/s11734-022-00574-x
Regular Article
Structural defects effect in fine-grained MgAl
O
sintered ceramics: optical and RPE properties as function of microstructure
1
LSPM UPR 3407, CNRS, Université Sorbonne Paris Nord, 93430, Villetaneuse, France
2
GREMAN UMR7347, CNRS, Université de Tours, 37200, Tours, France
3
LPEM, ESPCI Paris, Université PSL, Sorbonne Université, CNRS, 75005, Paris, France
4
Institute of Physics, University of Tartu, 50411, Tartu, Estonia
a
hugo.spiridigliozzi@lspm.cnrs.fr
Received:
4
February
2022
Accepted:
9
April
2022
Published online:
17
April
2022
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 MgAl
O
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 Mn
ions reduction after consolidation of powders.
© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2022
