Method of producing magnesium-based hydrides and apparatus...

Details Method of producing magnesium-based hydrides and apparatus... Method of producing magnesium-based hydrides and apparatus...

2011-08-16

2011-08-16

Langel, Wayne (Department: 1736)

Chemistry of inorganic compounds

Hydrogen or compound thereof

Binary compound

Reexamination Certificate

active

07998454

ABSTRACT:
A first heat treatment is carried out in which a material powder comprising magnesium is kept in the atmosphere of hydrogen gas and the temperature and pressure in the atmosphere of hydrogen gas are maintained in the temperature-pressure region in which single Mg and H2coexist in a thermodynamically stable state, whereby the coating on the surface of the material powder is removed. Next, a second heat treatment is carried out in which the temperature and pressure in the atmosphere of hydrogen gas are changed and maintained in the temperature-pressure region in which MgH2exists in a thermodynamically stable state. Hence, Mg from which the coating is removed reacts promptly with H2, and MgH2is produced at high yield. Magnesium-based hydrides containing high purity MgH2can thus be obtained by supplying energy less than that required for the related art that requires an activation treatment.

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