Entropy-stabilized oxides

Christina M. Rost, Edward Sachet, Trent Borman, Ali Moballegh, Elizabeth C. Dickey, Dong Hou, Jacob L. Jones, Stefano Curtarolo () and Jon-Paul Maria ()
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Christina M. Rost: North Carolina State University
Edward Sachet: North Carolina State University
Trent Borman: North Carolina State University
Ali Moballegh: North Carolina State University
Elizabeth C. Dickey: North Carolina State University
Dong Hou: North Carolina State University
Jacob L. Jones: North Carolina State University
Stefano Curtarolo: Center for Materials Genomics, Duke University
Jon-Paul Maria: North Carolina State University

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract 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.

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9485

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DOI: 10.1038/ncomms9485

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