Ceramic member with oxygen ion conductivity and use thereof

A laminated oxygen ion conductive part comprising:

• a porous support body;
• and
• at least one membranous ceramic member with a thickness of 0.5mm or less which is provided on the surface of the porous support body, the ceramic member having a perovskite-type crystal structure represented by any one of the following (A)-(B):
• (A) The general formula
• (Ln1−xSrx)(Ti1−yFey)O3
• where the Ln represents at least one element selected from lanthanoids;
• the x satisfies the condition 0.2≦x≦0.6 the y satisfies the condition 0.5≦y<1 and x and y satisfy the condition 1≦x+y<1.2;
• and
• (B) the general formula
• (Ln1−xBax)(Ti1−yFey)O3
• where the Ln represents at least one element selected from lanthanoids, the x satisfies the condition 0.3≦x≦0.7, the y satisfies the condition 0.5≦y<1, and x and y satisfy the condition 1≦x+y<1.2.

An oxygen ion permeation module comprising:

• a casing;
• at least one membranous ceramic member with oxygen ion conductivity and a thickness of 0.5mm or less which is accommodated in the casing, the ceramic member having a perovskite-type crystal structure and a composition represented by any one of the following (A)-(B):
• (A) the general formula
• (Ln1−xSrx)(Ti1−yFey)O3
• where the Ln represents at least one element selected from lanthanoids;
• the x satisfies the condition 0.2≦x≦0.6, the y satisfies the condition 0.5≦y<1, and x and y satisfy the condition 1≦x+y <1.2;
• and
• (B) the general formula
• (Ln1−xBax)(Ti1−yFey)O3
• where the Ln represents at least one element selected from lanthanoids, the x satisfies the condition 0.3≦x≦0 7, the y satisfies the condition 0.5y≦y≦1, and x and y satisfy the condition 1≦x+y≦1.2;
• an oxygen source supply chamber for supplying an oxygen-containing gas from the outside, the oxygen source supply chamber being provided inside the casing so as to face the ceramic member;
• and
• an oxidation reaction chamber provided inside the casing so as to face the ceramic member, hermetically separated from the oxygen source supply chamber via the ceramic member and serving to induce an oxidation reaction with the participation of oxygen ions that are supplied by permeation through the ceramic member from the oxygen source supply chamber.