Oxygen Permeation Property in Nd Deficient Nd[sub 2]NiO[sub 4] Mixed Oxide Doped with Cu and Ga

Abstract

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.