| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing nickel oxide powder by which nickel oxide powder having a small mean particle diameter as well as a low sulfur content can stably be manufactured using nickel sulfate containing water of crystallization as a starting material and which has lower energy consumption than a conventional method and is economically advantageous. SOLUTION: Two furnaces are used as the manufacturing furnace, in the first manufacturing furnace, nickel sulfate containing water of crystallization is calcined to form anhydrous nickel sulfate, and in the second manufacturing furnace, the anhydrous nickel sulfate is roasted at a maximum temperature of 950-1,040°C while forcing air to flow from the outlet side toward the inlet side at a flow rate of≥20 mm/sec with respect to the cross-sectional area of the furnace. A calcining temperature in the first manufacturing furnace is preferably 450-600°C. The objective nickel oxide powder having a grain size of about 0.4-0.5μm and a sulfur content of≤100 ppm is obtained. COPYRIGHT: (C)2004,JPO
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