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arXiv 1809.09202cond-mat.mtrl-sci
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无机三元金属氮化物的结构图

A Map of the Inorganic Ternary Metal Nitrides

Wenhao Sun, Christopher Bartel, Elisabetta Arca, Sage Bauers, Bethany Matthews, Bernardo Orvañanos, Bor-Rong Chen, Michael F. Toney, Laura T. Schelhas, William … 展开作者

Wenhao Sun, Christopher Bartel, Elisabetta Arca, Sage Bauers, Bethany Matthews, Bernardo Orvañanos, Bor-Rong Chen, Michael F. Toney, Laura T. Schelhas, William Tumas, Janet Tate, Andriy Zakutayev, Stephan Lany, Aaron Holder, Gerbrand Ceder

摘要:

在新的化学空间中进行探索性合成是固态化学的本质。然而,未知的化学空间可能很难导航,特别是当材料合成具有挑战性时。氮化物代表了这样一个空间,其中严格的合成限制限制了这类重要的功能材料的探索。在这里,我们采用一套计算材料发现和信息学工具来构建无机三元金属氮化物的大稳定性图。我们的地图聚类的三元氮化物到化学家族具有不同的稳定性和亚稳性,并突出了数百个有前途的新的三元氮化物空间的实验研究-从我们实验实现7个新的锌和镁基三元氮化物。通过从DFT计算的电子密度中提取固态键合的混合金属性、离子性和共价性,我们揭示了化学、组成和电子结构之间在控制三元氮化物材料大规模稳定性趋势方面的复杂相互作用。

英文摘要:

Exploratory synthesis in novel chemical spaces is the essence of solid-state chemistry. However, uncharted chemical spaces can be difficult to navigate, especially when materials synthesis is challenging. Nitrides represent one such space, where stringent synthesis constraints have limited the exploration of this important class of functional materials. Here, we employ a suite of computational materials discovery and informatics tools to construct a large stability map of the inorganic ternary metal nitrides. Our map clusters the ternary nitrides into chemical families with distinct stability and metastability, and highlights hundreds of promising new ternary nitride spaces for experimental investigation--from which we experimentally realized 7 new Zn- and Mg-based ternary nitrides. By extracting the mixed metallicity, ionicity, and covalency of solid-state bonding from the DFT-computed electron density, we reveal the complex interplay between chemistry, composition, and electronic structure in governing large-scale stability trends in ternary nitride materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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