A detailed anelastic spectroscopy study of the structural phase transition of ammonia borane was conducted for the first time. The transformation from the tetragonal high temperature phase into the orthorhombic low temperature one is detected on cooling around 220K by a huge drop of the elastic modulus and a spike of the elastic energy dissipation.We find clear indications of a hysteresis, which led us to conclude that the transition is of first-order. The kinetics of the transitionwas investigated in detail. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy.
Revised: October 10, 2011 |
Published: September 25, 2010
Citation
Paolone A., O. Palumbo, O. Palumbo, P. Rispoli, R. Cantelli, and T. Autrey. 2010.An Investigation of the Structural Phase Transition of Ammonia Borane.Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing 521-22.PNNL-SA-69079.