METHOD FOR PRODUCING ALUMINA-SILICA-BASED FIBER, HOLDING SEAL MATERIAL FOR CATALYST CONVERTER, AND METHOD FOR SPINNING ALUMINA-SILICA-BASED FIBER

摘要

PROBLEM TO BE SOLVED: To provide a method for producing alumina-silica-based fibers suitable for the production of a holding seal material, since the long fibers can be easily produced and further a target cross-sectional shape can be imparted to each of the fibers.;SOLUTION: This method for producing the alumina-silica-based fibers comprises a spinning process and the subsequent sintering process. In the spinning process, a spinning raw liquid 8 comprising an aqueous aluminum salt solution, a silica sol, and an organic polymer is extruded from a nozzle 9 to obtain a precursor fiber 6A. Herein, a water-soluble plasticizer is further added to the spinning raw liquid 8. In the subsequent sintering process, the precursor fiber 6A are thermally sintered to obtain alumina-silica-based fibers 6.;COPYRIGHT: (C)2002,JPO