Entropy-stabilized oxides

Configurational disorder can be compositionally engineered into mixed oxide by populating a single sublattice with many distinct cations. The formulations promote novel and entropy-stabilized forms of crystalline matter where metal cations are incorporated in new ways. Here, through rigorous experim...

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Bibliographic Details
Published in:Nature communications 2015-09, Vol.6 (1), p.8485-8485, Article 8485
Main Authors: Rost, Christina M., Sachet, Edward, Borman, Trent, Moballegh, Ali, Dickey, Elizabeth C., Hou, Dong, Jones, Jacob L., Curtarolo, Stefano, Maria, Jon-Paul
Format: Article
Language:English
Subjects:
639/301/1023/1026
639/301/119/2795
639/638/440/951
Cations
Crystal structure
Crystallinity
Entropy
Formulations
Humanities and Social Sciences
Metal ions
Mixed oxides
multidisciplinary
Oxides
Phases
Science
Science (multidisciplinary)
Thermodynamic models
Thermodynamics
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Summary:Configurational disorder can be compositionally engineered into mixed oxide by populating a single sublattice with many distinct cations. The formulations promote novel and entropy-stabilized forms of crystalline matter where metal cations are incorporated in new ways. Here, through rigorous experiments, a simple thermodynamic model, and a five-component oxide formulation, we demonstrate beyond reasonable doubt that entropy predominates the thermodynamic landscape, and drives a reversible solid-state transformation between a multiphase and single-phase state. In the latter, cation distributions are proven to be random and homogeneous. The findings validate the hypothesis that deliberate configurational disorder provides an orthogonal strategy to imagine and discover new phases of crystalline matter and untapped opportunities for property engineering. The composition of oxide compounds controls many of their properties and electronic phases. Here, the authors show that entropy and configurational disorder can stabilize new phases of oxides, potentially enabling a better engineering of their properties.
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms9485