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Multicomponent equiatomic rare earth oxides
oleh: Ruzica Djenadic, Abhishek Sarkar, Oliver Clemens, Christoph Loho, Miriam Botros, Venkata S. K. Chakravadhanula, Christian Kübel, Subramshu S. Bhattacharya, Ashutosh S. Gandhi, Horst Hahn
Format: | Article |
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Diterbitkan: | Taylor & Francis Group 2017-03-01 |
Deskripsi
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.