Hydrogen sorption behavior of CaAl1.5Li0.5
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- 作者：Matvey Bereznitsky ; Dmitry Mogilyanski ; Isaac Jacob
- 刊名：Applied Physics A: Materials Science & Processing
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：122
- 期：4
- 全文大小：816 KB
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24.P. Javadian, D.A. Sheppard, T.R. Jensen, C.E. Buckley, Destabilization of lithium hydride and the thermodynamic assessment of the Li-Al-H system for solar thermal energy storage (to be submitted) - 作者单位：Matvey Bereznitsky (1) (2)
Dmitry Mogilyanski (3)
Isaac Jacob (1)
1. Unit of Nuclear Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel
2. Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel
3. Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel - 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Condensed Matter
Optical and Electronic Materials
Nanotechnology
Characterization and Evaluation Materials
Surfaces and Interfaces and Thin Films
Operating Procedures and Materials Treatment - 出版者：Springer Berlin / Heidelberg
- ISSN：1432-0630
文摘
The hydrogen sorption properties of an alloy with nominal composition CaAl1.5Li0.5 have been investigated in a pursuit for hydrogen-absorbing Li-containing intermetallics. X-ray analysis of the original alloy indicated a coexistence of three closely related Laves phases. The maximum hydrogen capacity, recorded at about 6 MPa and 300 °C, was approximately 2.5 H atoms per formula unit (f.u.). Pressure-composition (p-c) isotherm measurements were taken in the temperature range between 350 and 450 °C up to pressures of 133 kPa. Thermodynamic parameters are derived for two plateau regions in the p-c isotherms. Analysis of these parameters and supporting evidence from X-ray patterns of hydrogenated and dehydrogenated samples suggest: (a) an initial irreversible disproportionation of the original alloy and (b) subsequent reversible hydrogenations, featuring reversible disproportionations of CaAl2 and LiAl intermetallic compounds. Attempts to form additional Li-containing intermetallics, namely CaAlLi, TiMn2−x Li x (x = 0.2, 0.3, 0.4, 0.6) and TiAl2−x Li x (x = 0.3, 0.5), and to hydrogenate them, are reported in brief.