Oxide microcrystal particles

Patent Granted PROBLEM TO BE SOLVED: To provide a method of manufacturing oxide microcrystal particles largely improving the ratio of oxide microcrystal particles formed of active crystal planes than before, a powder consisting of 50 mass% or more of oxide microcrystal particles formed of active crystal planes not obtainable heretofore, and furthermore, a catalyst superior in low-temperature and high-temperature catalytic activities.