以柠檬酸和硝酸镍为原料,采用固相反应法,通过改变反应物配比和反应物加入顺序制备前驱体,再经高温煅烧制得氧化镍粉体;利用热重分析仪、X射线衍射分析仪和扫描电镜等对前驱体和合成产物进行了表征.结果表明:固相反应法制备氧化镍的过程中,当柠檬酸与硝酸镍物质的量比为1.2时,且采用将柠檬酸逐步加入硝酸镍中研磨得到的前驱体经400℃煅烧2 h后,产物中基本无单质镍相出现,大部分为氧化镍相,且氧化镍形成了大的空间网络结构.
Nickel oxide powders were perpared by high-temperature calcination. The precursor was perpared using solid state reaction method with citric acid and nickel nitrate as raw materials through changing the ratio of reactants and the addition order of reactants. The precursor and synthetic products were characterized by TG,XRD and SEM. The results show that the precursor was obtained by grinding during which the substance ratio of citric acid to nickel nitrate was 1.2:1 and citric acid was gradually added. Then the precursor was calcined at 400 ℃ for 2 h to get the nickel oxide. No simple substance but NiO phase was found in the products, nickel oxide formed a large net structure.
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