Abstract: A process is disclosed for making ultra fine fibers comprising forming a continuous cladding about a plurality of coated metallic wires. The cladding is drawn for reducing the outer diameter and for diffusion bonding the coating within the cladding. A plurality of the drawn claddings are assembled and a second cladding is formed the remainders. The second cladding is drawn for further reducing the outer diameter. The sacrificial coating and the claddings are removed to obtain a plurality of ultra fine fibers. In some embodiments, the ultra fine fibers are converted through a doping process.

Abstract: An improved formed membrane and process of making is disclosed comprising the deposition of fine metallic fibers onto a formed substrate. The deposited fine fibers accumulate on the formed substrate to form a formed layer of membrane material. Catalytically active particles can be dispersed with the fine fibers. A nonporous mask can be applied to a portion of the formed substrate. The formed layer of membrane material is sintered for forming the formed membrane.

Abstract: An improved tubular membrane and process of making is disclosed comprising the deposition of fine metallic fibers onto a substrate. The deposited fine metallic fibers are heated to form a flexible membrane. Catalytically active particles can be dispersed with the fine metallic fibers. The flexible membrane is wound to form a membrane winding. The membrane winding is sintered for forming a substantially rigid tubular membrane.