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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 >High-resolution atomic distribution functions of disordered materials by high-energy X-ray diffraction
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High-resolution atomic distribution functions of disordered materials by high-energy X-ray diffraction

机译：高能X射线衍射对无序材料的高分辨率原子分布函数

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摘要

The atomic-scale structure of materials with different degrees of structural disorder has been investigated by high-energy (E greater than or equal to 60 keV) X-ray diffraction. Good quality structure functions extended to wave vectors of magnitude Q greater than or equal to 40 Angstrom (-1) have been obtained even in case of materials composed of weakly scattering, light atomic species. The corresponding high-resolution atomic distribution functions allowed fine structural features differing in as little as (0.14 Angstrom) to be resolved. In particular, the distinct Ga-As (similar to2.43 Angstrom) and In-As (2.61 Angstrom) bonds in In-Ga-As alloys have been differentiated. The atomic-scale structure or 'restacked' WS2 has been determined and the presence of three distinct W-W distances occurring at 2.77, 3.27 and 3.85 Angstrom established. Finally, Si-O (similar to1.61 Angstrom), Al-O (similar to1.75 Angstrom) and Ca-O (similar to2.34 Angstrom) bonds in calcium aluminosilicate glasses have been differentiated and the characteristics of the respective co-ordination polyhedra revealed. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 11]
机译：已经通过高能（E大于或等于60 keV）X射线衍射研究了具有不同程度的结构无序的材料的原子级结构。即使在材料由弱散射的轻原子组成的情况下，也已经获得了高质量的结构函数，扩展到Q值大于或等于40埃（-1）的波矢。相应的高分辨率原子分布函数可以使精细的结构特征相差仅0.14埃。特别是，In-Ga-As合金中不同的Ga-As键（类似于2.43埃）和In-As键（2.61埃）已被区分。已经确定了原子级结构或“重新堆积”的WS2，并确定了在2.77、3.27和3.85埃处出现的三个不同的W-W距离的存在。最后，区分了硅铝酸钙玻璃中的Si-O（约1.61埃），Al-O（约1.75埃）和Ca-O（约2.34埃）键，并确定了它们各自的共晶特征。整理多面体。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：11]

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