| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for inexpensively, efficiently and safely manufacturing superfine particles of trimanganese tetraoxide having a sharp grain size distribution. SOLUTION: The method for manufacturing the superfine particles of the trimanganese tetraoxide consisting of partitioning an electrolytic cell with an ion exchange membrane to provide the cell with an anode chamber and a cathode chamber, using a manganese-containing aqueous solution for an anode chamber catholyte, passing electricity between the anode and the cathode to migrate manganese ions through the ion exchange membrane from the anode side to the cathode side and oxidizing the product deposited in the cathode chamber, in which the pH of the cathode chamber electrolyte is regulated to 9 to 11 and bubbling is execute by gas containing 10 to 70 vol.% oxygen. |
