Dresden 2006 – wissenschaftliches Programm

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MM: Metall- und Materialphysik

MM 25: Poster Session

MM 25.36: Poster

Mittwoch, 29. März 2006, 15:30–17:30, P4

Hydrogen sorption properties of MgH2 prepared by high pressure reactive milling — •J. Zulkarnain, M. Herrich, B. Gebel, S. Doppiu, O. Gutfleisch, and L. Schultz — IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany

Magnesium is considered as one of potential hydrogen storage materials because of its high capacity and low cost. However, high work temperature, slow raction kinetics and hard activation process limit the practical application of Mg-based hydrides. Recently, the reactive ball milling was successfully introduced to prepare hydrogen storage materials. In this work, MgH2 catalyzed with Ni nanoparticle was synthesized by high pressure reactive milling (HPRM) under hydrogen up to 100 bar. The hydrogen sorption properties were investigated using intelligent gravimetric analysis (IGA), phase identification and microstructure of the milled powders were examined using X-ray diffraction and scanning electron microscopy, respectively. Interesting to note that milling process could be reduced up to 2 hours which absorbed hydrogen about 5.3 wt% within 10 minutes. The results will be discussed in details.