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Pressure-temperature phase relations in complex hydrides
Umeå University, Faculty of Science and Technology, Department of Physics.
2009 (English)In: Solid State Phenomena, ISSN 1012-0394, E-ISSN 1662-9779, Vol. 150, 175-195 p.Article, review/survey (Refereed) Published
Abstract [en]

Interest in hydrogen as a future energy carrier in mobile applications has led to a strong increase in research on the structural properties of complex alkali metal and alkaline earth hydrides, with the aim to find structural phases with higher hydrogen densities. This contribution reviews recent work on the structural properties and phase diagrams of these complex hydrides under elevated pressures, an area where rapid progress has been made over the last few years. The materials discussed in greatest detail are LiAlH4, NaAlH4, Li3AlH6, Na3AlH6, LiBH4, NaBH4, and KBH4. All of these have been studied under high pressure by various methods such as X-ray or neutron scattering, Raman spectroscopy, differential thermal analysis or thermal conductivity measurements in order to find information on their structural phase diagrams. Based mainly on experimental studies, preliminary or partial phase diagrams are also given for six of these materials. In addition to this information, data are provided also on experimental results for a number of other complex hydrides, and theoretical predictions of new phases and structures under high pressures are reviewed for several materials not yet studied experimentally under high pressure.

Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2009. Vol. 150, 175-195 p.
Keyword [en]
High pressure, phase diagram, structure, hydrides, LiAlH4, Li3AlH6, NaAlH4, Na3AlH6, LiBH4, NaBH4, KBH4, Mg hydrides, X-ray diffraction, Raman spectroscopy, thermal conductivity
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:umu:diva-11539DOI: 10.4028/www.scientific.net/SSP.150.175OAI: oai:DiVA.org:umu-11539DiVA: diva2:151210
Note

This is an OPEN ACCESS paper. The journal volume has also been published separately under the title "Solid Phase Transformations II", edited by J. Cermak and I. Stloukal

Available from: 2009-01-14 Created: 2009-01-14 Last updated: 2017-12-14Bibliographically approved

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