K2NiF4 type composite oxide production method, exhaust gas purification catalyst, and production method thereof

摘要

PPROBLEM TO BE SOLVED: To provide a KSB2/SBNiFSB4/SBtype composite oxide which is excellent in reactivity with water and heat resistance so as to be suitable as a catalyst for an automobile, does not make rather high in manufacturing cost, and sufficiently ensures a specific surface area of the oxide so as to suitably use it as an exhaust gas purifying catalyst. PSOLUTION: The KSB2/SBNiFSB4/SBtype composite oxide has a composition of the formula: SrSB2-X/SBLnSBX/SBMnOSB4/SB(wherein Ln is at least one element among lanthanoids type rare earth elements; the range of X is 0.1X0.5). PCOPYRIGHT: (C)2005,JPO&NCIPI