due to the muitiple effects, involving the different hydrogen diffusion and hydrogenation rate at different absorption temperature, refined particle size and saturated hydrogen concentration of metal hydride, the hydrogen absorption capacity of BM-15h ZK60 powder is increased from 2.5wt% at 300℃ to 4.3wt% at 350℃ and then drops to 3.7wt% at 400℃.