Entropy-stabilized oxides.
Entropy-stabilized oxides.
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熵稳定的氧化物。
DOI：
10.1038/ncomms9485
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发表时间：
2015-09-29
影响因子：
16.6
通讯作者：
Maria JP
中科院分区：
文献类型：
--
作者：
Rost CM;Sachet E;Borman T;Moballegh A;Dickey EC;Hou D;Jones JL;Curtarolo S;Maria JP
通过用许多不同的阳离子填充单个子晶格，可以在组成上将晶格无序设计成混合氧化物。所述制剂促进结晶物质的新颖且熵稳定的形式，其中金属阳离子以新方式并入。在这里，通过严格的实验，一个简单的热力学模型，和一个五组分氧化物配方，我们毫无疑问地证明，熵占主导地位的热力学景观，并驱动多相和单相状态之间的可逆固态转换。在后者中，阳离子分布被证明是随机和均匀的。研究结果验证了这一假设，即故意的结构紊乱提供了一个正交的战略，想象和发现新的阶段的结晶物质和未开发的机会，房地产工程。氧化物化合物的组成控制了它们的许多性质和电子相。在这里，作者表明熵和构型无序可以稳定氧化物的新相，从而可能使其性能更好地工程化。
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.