| 摘要 |
[Problem] To manufacture perovskite-phase strontium titanate fine particles in low alkali conditions. [Solution] Strontium titanate fine particles are manufactured by performing the following steps: step A1, in which an Sr-containing aqueous solution and a Ti-containing aqueous solution are prepared; step B1, in which the Sr-containing aqueous solution and the Ti-containing aqueous solution are mixed to prepare a mixed solution; step C1, in which a basic substance is added to the mixed solution to adjust the pH of the mixed solution so as to be greater than 10, and a reaction solution is prepared; and step D1 in which the reaction solution is subjected to a hydrothermal reaction at a temperature of at least 250℃, or a sub-critical or super-critical reaction. If the pH of the reaction solution to be prepared in step C1 is taken as X, and the reaction temperature of the reaction solution in step D1 is taken as Y, X and Y satisfy Y>-100X+1400, and X≥10, and Y≥250. |
