Oxygen permeation property in nd deficient Nd_2 NiO_4 mixed oxide doped with Cu and Ga

摘要

Oxygen permeation property in Nd deficient Nd_2 NiO_4 was studied. The oxygen permeation rate increases with increasing Ga. Nd deficiency in Nd_2 NiO_4 is also useful for increasing the oxygen permeation rate. The improved oxygen permeation rate could be assigned to the increased amount of excess oxygen and stabilizing a tetragonal structure at a low temperature. The oxygen permeation rate of Nd_(1.9) (Ni _(0.75) Cu_(0.25))_(0.95) Ga_(0.05) O _4 achieved a value of 3.6 cm~3 /min cm~2 from air to He at 1273 K with 0.5 mm thickness and this value belongs to the highest class in the reported oxygen permeation rate.