Multicomponent equiatomic rare earth oxides
By R. Djenadić, Abhishek Sarkar, O. Clemens, C. Loho, M. Botros, V. Chakravadhanula, C. Kübel, S. Bhattacharya, A. Gandhi, H. Hahn. 2017
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ABSTRACT 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. GRAPHICAL ABSTRACT IMPACT STATEMENT Multicomponent equiatomic rare earth oxides pioneer a new group of materials that crystallize into a single-phase structure with the dominant role of a single element instead of entropy.
Subfields: Ceramics and Composites, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/e47a52a0e8f602f47ebf46da69893af94e67e260
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Citations in the corpus
- A high-entropy silicide: (Mo0.2Nb0.2Ta0.2Ti0.2W0.2)Si2 (2019, background): “ 26, 27, 28, 29]. Third, several other classes of high-entropy ceramics have also been reported, including perovskite [30, 31, 32], spinel [33], defective fluorite-structured [34, 35], and rare earth [32, 36] oxides, and high-entropy nitrides [37, 38]. It is worth noting that the high-entropy oxides”
- High-Entropy Ceramics (2019, methodology): “[13] utilized nebulized spray pyrolysis (NSP) to synthesize single-phase rare earth oxide powders from seven equiatomic rare earth oxides.”