Patent ID: 7866486

Claim:
A composite comprising at least one hollow fibre comprising (A) an oxygen-transporting ceramic material, wherein said ceramic material conducts oxygen anions and electrons, and wherein said oxygen-transporting ceramic material is an oxide ceramic having a perovskite structure ABO 3-δ , wherein (1) A is a divalent cation; (2) B is a trivalent or higher-valent cation; (3) the ionic radius of A is greater than the ionic radius of B; (4) δ is from 0.01 to 0.9, rendering said oxide ceramic electrically neutral; and (5) A and/or B are optionally present as mixtures of different cations; or (B) a combination of a ceramic material which conducts oxygen anions and a ceramic or nonceramic material which conducts electrons; wherein the outer surface of said at least one hollow fibre is in contact with the outer surface of the same hollow fibre or another hollow fibre of oxygen-transporting ceramic material and wherein the contact points are joined by sintering.