We have investigated the structural and dehydriding properties of Ca(BH4)2. It was found that Ca(BH4)2 undergoes a structural phase transformation from an orthorhombic low-temperature (LT) modification into a tetragonal high-temperature (HT) modification between 433∈K and 523∈K. The amount of hydrogen desorbed from Ca(BH4)2 during the pressure-composition (p-c) isotherm measurement was 5.9 mass%. This hydrogen desorption is caused by the partial dehydrogenation of Ca(BH4)2 accompanied by the formation of CaH2 and orthorhombic intermediate phases.
|Number of pages||5|
|Journal||Applied Physics A: Materials Science and Processing|
|Publication status||Published - Aug 1 2008|
All Science Journal Classification (ASJC) codes
- Materials Science(all)