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 220 K 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 transition was investigated in detail. (C) 2009 Elsevier B.V. All rights reserved.

An investigation of the structural phase transition of ammonia borane / Annalisa, Paolone; Oriele, Palumbo; Rispoli, Pasquale; Cantelli, Rosario; Tom, Autrey. - In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING. - ISSN 0921-5093. - 521-22:(2009), pp. 169-171. ((Intervento presentato al convegno 15th International Conference on Internal Friction and Mechanical Spectroscopy (ICIFMS-15) tenutosi a Perugia, ITALY nel JUL 20-25, 2008 [10.1016/j.msea.2008.09.145].

An investigation of the structural phase transition of ammonia borane

RISPOLI, PASQUALE;CANTELLI, Rosario;
2009

Abstract

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 220 K 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 transition was investigated in detail. (C) 2009 Elsevier B.V. All rights reserved.
ammonia borane; elastic properties; hydrogen storage; structural phase transition
01 Pubblicazione su rivista::01a Articolo in rivista
An investigation of the structural phase transition of ammonia borane / Annalisa, Paolone; Oriele, Palumbo; Rispoli, Pasquale; Cantelli, Rosario; Tom, Autrey. - In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING. - ISSN 0921-5093. - 521-22:(2009), pp. 169-171. ((Intervento presentato al convegno 15th International Conference on Internal Friction and Mechanical Spectroscopy (ICIFMS-15) tenutosi a Perugia, ITALY nel JUL 20-25, 2008 [10.1016/j.msea.2008.09.145].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/28659
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