Optical transmission of magnesium hydride thin film with characteristic nanostructure

被引:45
作者
Yamamoto, K
Higuchi, K
Kajioka, H
Sumida, H
Orimo, S
Fujii, H
机构
[1] Mazda Motor Corp, Tech Res Ctr, Hiroshima 7308670, Japan
[2] Western Hiroshima Prefecture Ind Res Inst, Kure 7370004, Japan
[3] Hiroshima Univ, Fac Integrated Arts & Sci, Higashihiroshima 7398521, Japan
关键词
hydrogen storage; optical transmission; nanostructure; magnesium hydride; transmission electron microscopy;
D O I
10.1016/S0925-8388(01)01628-0
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Optical and structural properties of rare-earth free and pure Mg thin film coated with Pd have been investigated. Optical examination indicates that the fully hydrogenated films are in a color-neutral transparent state. With increasing temperature up to 453 K in air, nontransparent scratch-ace parts that correspond to dehydrogenated Mg precipitate in macroscopic scale, and their number gradually increases and grows sharply along specific orientations. The structural characterization indicates that the Mg layer is composed of epitaxial columnar grains whose widths are less than 100 nm with a c-axis preferred orientation for the Mg layer. The columnar grains are restructured to grains with 50-100 nm diameter during hydrogenation-dehydrogenation (optical switching) cycles. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:352 / 356
页数:5
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