| 摘要 |
PURPOSE:To provide a metallic oxide composite body consisting of La, Bi and Co oxides and having superior selective oxygen permeability. CONSTITUTION:This metallic oxide composite body has a composition consisting of cobalt oxide, lanthanum oxide and bismuth oxide in 1:(0.01-20):(0.01-25) ratio as gram atomic number of each metal, and it shows >=10<-4>OMEGA<-1>cm<-1> oxygen ion conductivity and >=10<-2>OMEGA<-1>cm<-1> electron conductivity at about 400-1,200 deg.C. The preferred ratio of electron conductivity/oxygen ion conductivity is >0.1. Said composite body is manufactured by blending oxides, nitrates, acetates, etc. of the metals so as to give the prescribed composition after calcination and by calcining the blend at about 400-1,400 deg.C in an oxidizing atmosphere. Said composite body is formed into a thin film having about 10<-3>-10<-4>mum thickness, and the film is used to separate oxygen selectively at 300-1,200 deg.C. |
