Multicomponent equiatomic rare earth oxides

Multicomponent rare earth oxide (REO) nanocrystalline powders containing up to seven equiatomic rare earth elements were successfully synthesized in a single-phase CaF2-type (Fm-3 m) structure. The addition of more than six elements resulted in the formation of a secondary phase. Annealing at 1000°C...

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Bibliographic Details
Published in:Materials research letters 2017-03, Vol.5 (2), p.102-109
Main Authors: Djenadic, Ruzica, Sarkar, Abhishek, Clemens, Oliver, Loho, Christoph, Botros, Miriam, Chakravadhanula, Venkata S. K., Kübel, Christian, Bhattacharya, Subramshu S., Gandhi, Ashutosh S., Hahn, Horst
Format: Article
Language:English
Subjects:
entropy
nanocrystalline
rare earth oxide
single phase
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Summary:Multicomponent rare earth oxide (REO) nanocrystalline powders containing up to seven equiatomic rare earth elements were successfully synthesized in a single-phase CaF2-type (Fm-3 m) structure. The addition of more than six elements resulted in the formation of a secondary phase. Annealing at 1000°C for 1 h led to the formation of a single-phase (Ia-3) even in the 7-component system. In the absence of cerium (Ce4+), secondary phases were observed irrespective of the number of cations or the extent of thermal treatment indicating that cerium cations played a crucial role in stabilizing the multicomponent REOs into a phase pure structure.
ISSN:2166-3831
2166-3831
DOI:10.1080/21663831.2016.1220433