| 摘要 |
PROBLEM TO BE SOLVED: To obtain zirconia particles used for solid electrolytes, eliminated in the defects of products produced by conventional methods, good in moldability, excellent in low temperature sintering ability, and further excellent in ion conductivity, and to provide a method for producing the zirconia powder for the solid electrolytes, enabling to produce the zirconia powder in simple processes. SOLUTION: This zirconia particles for solid electrolytes comprise secondary agglomerates containing solid dissolved yttrium in an amount of 4-10mol.% as a stabilizer and having a BET specific surface area of 8-20m<2> /g and an average particle diameter of 0.1-1.0μm. This method for producing the zirconia particles for the solid electrolytes comprises calcining a mixture comprising a yttrium compound and a zirconia sol hydrate obtained by the hydrolysis of a zirconium salt aqueous solution and having a yttrium content of 4-10mol.% at a temperature of 800-1200 deg.C and subsequently grinding the calcination product into an average particle diameter of 0.1-1.0μm. |
