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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Total understanding of the local structures of an amorphous slag: Perspective from multi-nuclear (Si-29, Al-27, O-17, Mg-25, and Ca-43) solid-state NMR
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Total understanding of the local structures of an amorphous slag: Perspective from multi-nuclear (Si-29, Al-27, O-17, Mg-25, and Ca-43) solid-state NMR

机译：全面了解无定形炉渣的局部结构：多核（Si-29，Al-27，O-17，Mg-25和Ca-43）固态NMR的透视图

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摘要

Local environments of all constituent elements (Si, Al, O, Mg, and Ca) in an amorphous slag were examined using multi-nuclear solid-state NMR under high magnetic field (16.4 T). The amorphous slag framework structure can be generally described as a depolymerized, chain-like network of SiO4 tetrahedra branched with AlO4 tetrahedra. O-17 multiple-quantum magic angle spinning (MQMAS) spectrum demonstrated that oxygens occupy structurally inequivalent sites, depending on their bonding nature. Mg-25 and Ca-43 MQMAS spectra also showed multi-site occupancy of the ions, and the average coordination numbers were estimated to about 6 and 7, respectively. Our results should underscore the impact of the high magnetic field NMR techniques, especially MQMAS, when applied to non-crystalline solids. (C) 2007 Elsevier B.V. All rights reserved.
机译：使用多核固态NMR在高磁场（16.4 T）下检查了非晶态炉渣中所有组成元素（Si，Al，O，Mg和Ca）的局部环境。非晶炉渣骨架结构通常可以描述为由AlO4四面体支链的SiO4四面体的解链链状网络。 O-17多量子魔术角旋转（MQMAS）光谱表明，氧占据了结构上不等价的位置，具体取决于它们的键合性质。 Mg-25和Ca-43 MQMAS光谱也显示了离子的多位占有率，平均配位数估计分别约为6和7。我们的结果应强调高磁场NMR技术（尤其是MQMAS）应用于非晶态固体时的影响。 （C）2007 Elsevier B.V.保留所有权利。

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