| 摘要 |
PROBLEM TO BE SOLVED: To continuously grow oxide particles of a plurality of metallic elements composed of a plurality of layers from a center part to a surface using Ni as a main metallic element by changing the composition or kind of metallic group salt for forming oxides in the layers of the adjacent stages of a reaction crystallization vessel. SOLUTION: In a reaction vessel 1, a nickel salt aqueous solution supply line 3, a different kind metallic salt aqueous solution supply line 4, a medium crystal material supply line 5 and an alkaline aqueous solution supply line 6 are introduced, and in a reaction vessel 2, a nickel aqueous solution supply line 7, a different kind metallic salt supply line 8 and an alkaline aqueous solution supply line 9 are introduced. The alkaline aqueous solution supply lines 6 and 9 maintains pH within a specified range by a pH state. By performing continuous supplying to a subsequent stage vessel at the same flow speed as that for starting material aqueous solution, a grown oxide made of a plurality of metal elements is taken out. Conditions in the vessel are maintained constant by stirring blades 16 and 17 connected to stirring devices 14 and 15 in the reaction vessels 1 and 2. |
