Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 461, Issue 1-2, Pages L20-L22Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.07.097
Keywords
hydrogen storage materials; phase transitions; thermochemistry; X-ray diffraction; thermal analysis
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Funding
- Ministry of Education, Science & Technology (MoST), Republic of Korea [2E20310] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The thermal decomposition behavior of adduct-free Ca(BH4)(2), prepared by heating Ca(BH4)(2)center dot 2THF powder under vacuum, was investigated by X-ray diffraction and thermal analyses. It has been found that Ca(BH4)(2) undergoes a polymorphic transformation at 440 K and eventually decomposes in two steps between 620 and 770 K. CaH2 and an unknown intermediate compound form after the first step, but CaH2 is the only crystalline phase observed after the second step with a total weight loss of about 9.0 wt.%. (c) 2007 Elsevier B.V. All rights reserved.
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