Entropy-Stabilized Oxides

Configurational disorder can be compositionally engineered into mixed oxide by populating asingle sublattice with many distinct cations. The formulations promote novel and entropystabilizedforms of crystalline matter where metal cations are incorporated in new ways.Here, through rigorous experiments...

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Bibliographic Details
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: Report
Language:English
Subjects:
chemical analysis
crystal structure
entropy
materials science
oxides
stabilization
thermodynamics
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Summary:Configurational disorder can be compositionally engineered into mixed oxide by populating asingle sublattice with many distinct cations. The formulations promote novel and entropystabilizedforms of crystalline matter where metal cations are incorporated in new ways.Here, through rigorous experiments, a simple thermodynamic model, and a five-componentoxide formulation, we demonstrate beyond reasonable doubt that entropy predominatesthe thermodynamic landscape, and drives a reversible solid-state transformation betweena multiphase and single-phase state. In the latter, cation distributions are proven tobe random and homogeneous. The findings validate the hypothesis that deliberateconfigurational disorder provides an orthogonal strategy to imagine and discover new phasesof crystalline matter and untapped opportunities for property engineering. Nature Communications , 01 Jan 0001, 01 Jan 0001,