In order to prepare low cost

high hydrogen permeability

long runtime and high stress H-permselective membranes

the refractory metal zirconium(Zr) was selected as the membranes substrate. At the vacuum of 3.0×10-7Pa

ion bombardment eroding was used to remove the oxide film of zirconium on the surface. It is found that a small amount of oxide film still existed on the film. At the vacuum of 6.6× 10-6Pa

an about 400nm thick Pd film was plated on both surfaces of the zirconium disk(050mmx0.23mm) by the method of ion sputtering plating. The surfaces of the zirconium and the composite membranes were analyzed by XRD and XPS. Through hydrogen permeating tests

it showed that the H-permeability of this composite membrane was 9.917×10-8mol/m·s·Pa1/2 (at 623K

up-pressure 0.2MPa

down pressure 0. 1MPa)

6.8 times as high as that of commercial Pd-Ag membranes in the same state. It is found that this Pd-Zr H-permselective composite membrane can be vastly applicable for the purification of nuclear and fusion fuel and the distillation of tritium from breeder reactors.