Patent ID: 7998454
Filing Date: 2011-08-16
Classification: C01B

Abstract:
1. A method of producing magnesium-based hydrides comprising: keeping a material powder comprising magnesium in an atmosphere of hydrogen gas; removing a coating from a surface of said material powder by maintaining, for a first period, the temperature and pressure in said atmosphere of hydrogen gas in the temperature-pressure region in which the pressure is a first pressure and the temperature is set higher, by a temperature value in a first range, than the temperature corresponding to said first pressure on the equilibrium curve showing the equilibrium between the reaction in which single magnesium is combined with a hydrogen molecule to form magnesium hydride and the reverse reaction, wherein said first range is between the temperature corresponding to said first pressure and 100° C. higher than the temperature corresponding to said first pressure; and producing magnesium-based hydrides from said material powder by maintaining, for a second period, the temperature and pressure in said atmosphere of hydrogen gas in the temperature-pressure region in which the pressure is a second pressure and the temperature is not returned to room temperature but set lower, by a temperature value in a second range, than the temperature corresponding to said second pressure on said equilibrium curve, wherein said second range is between the temperature corresponding to said second pressure and 100° C. lower than the temperature corresponding to said second pressure.