【摘要】 采用均匀沉淀法 ,以硝酸钴和尿素为原料制备了纳米四氧化三钴微粉 ,对制备条件用正交实验进行优化 ,优化条件为 :反应体系pH =5 ,反应时间 3h ,尿素与硝酸钴摩尔比为 4 ,干燥时间为 10h。在此条件下 ,得到了粒径为 2 5nm的四氧化三钴微粉。更多还原

【Abstract】 Using Co(NO 3) 2 and CO(NH 2) 2 as raw materials,the nanometer-sized Co 3O 4 was prepared by homogeneous precipitation method.The influences of reaction time,raw materials ratio,drying time and pH of solution on particle size were investigated.The optimum conditions are as following:the pH of system:5,reaction time:3 h, CO(NH 2) 2 /Co(NO 3) 2(mole):4,drying time:10 h.The product has an average diameter of 25 nm with good dispersive and sphere-shaped.更多还原