Dy-DOPED NANO CERIA SINTERED COMPACT AND ITS MANUFACTURING METHOD

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PROBLEM TO BE SOLVED : To provide a highly electroconductive ceria sintered compact and its manufacturing method. SOLUTION : By passing through a process for yielding a precipitated product of a precursor having a specified composition, a Dy-doped nano ceria spherical particle with a controlled shape, less aggregated, and good sinterability is produced. By sintering it, a dense sintered compact comprising particles with an average diameter of ≤100 nm is manufactured, by which its electroconductivity is drastically improved and a nano-sintered compact with high electroconductivity unobtainable by a conventional rare-earth element-doped ceria sintered compact is obtained.