Nature Communications· 2015Q1
Entropy-stabilized oxides
- 3,303citations
- Q1SCImago
- 2015year
Short summary
A five-component oxide formulation demonstrates that entropy can drive a reversible solid-state transformation to a single-phase, entropy-stabilized oxide with randomly distributed cations.
AI-generated from the title and abstract; the full text is not read.
Key points
- Engineered configurational disorder in a five-component oxide leads to an entropy-stabilized single phase.
- Entropy, not enthalpy, drives a reversible solid-state transformation in this material.
- Cations in the single-phase state are randomly and homogeneously distributed.
- This work validates a new approach to discovering novel crystalline phases.
AI-generated from the title and abstract; the full text is not read.
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.
The authors' abstract, as published at the source. Nature Communications, 2015 · DOI ↗
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Field: Materials Chemistry
Materials ChemistryMaterials Science