Abstract
The paper studies the effect of additions of binary lanthanide oxides (lantana, ceria, and terbia) on the thermal decomposition of magnesium hydride phase. It is shown that ball-milling of powder mixtures of MgH 2 with 2mol% of the oxides in 10 bar hydrogen atmosphere makes possible the formation of composites where the particles of lanthanide oxides distribute uniformly in the volume of larger particles of magnesium hydride. The additions of the oxides of lanthanum, cerium, and terbium have been found to shift towards lower values the temperatures of the endothermic thermal decomposition of the magnesium hydride phases in the composites, and the addition of ceria having strongest effect.
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