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Surface energy and crystallization phenomena of ammonium dinitramide

 
: Teipel, U.; Heintz, T.

:

Propellants, explosives, pyrotechnics 30 (2005), Nr.6, S.404-411
ISSN: 0340-7462
ISSN: 0721-3115
ISSN: 1521-4087
Englisch
Zeitschriftenaufsatz
Fraunhofer ICT ()

Abstract
Ammonium dinitramide (ADN) was characterized during recrystallization from the melt. The surface tension of molten ADN at 97 degrees C was measured to be 89 mN/m. The wetting angles between molten ADN and different solid surfaces (polytetrafluoroethylene, glass, steel, and aluminum) were determined. The wettability depends on the Surface tension of molten ADN, the free surface energy of the solid surfaces and the interfacial tension between the solid and liquid. Observations of the recrystallization behavior of molten ADN showed that nucleation does not occur, even at super cooling rates of 70 K. Crystallization can be initiated by the application of seed crystals.

: http://publica.fraunhofer.de/dokumente/N-35545.html