【毕业论文】纯水中超细镍粉的制备.doc

PAGE 纯水中超细镍粉的制备 摘 要 本实验是以纯水环境下制备超细镍粉。以硫酸镍（NiSO4·6H2O）作为反应物；以水合肼(N2H4·H2O)为还原剂；用氢氧化钠(NaOH)调整溶液PH值为碱性；用酒石酸钠(C4H4O6Na2)作为分散剂；硫酸铜(CuSO4·5H2O)作为成核剂；以柠檬酸C6H8O7·H2O)为络合剂；又以不同的晶种硝酸银(AgNO3)和硫酸钴(CoSO4·7H2O)进行反应。分别在不同温度、不同的反应物浓度、不同的还原剂浓度以及不同的成核剂种类下进行实验。结果表明，硫酸镍反应浓度在0.6mo/L、水合肼浓度为3.0mol/L、反应温度在80℃下反应效果最佳，为最佳反应条件。当以硝酸银为反应的成核剂时效果较硫酸铜、硫酸钴更理想。 关键词：硫酸镍，温度，浓度，晶种 ATER IN THE PREPARATION OF ULTRAFINE NICKEL POWDER ABSTRACT This experiment is based on pure water prepare ultrafine nickel powder. Nickel sulfate (NiSO4 ? 6H2O) as reactants; Hydrazine hydrate (N2H4 ? H2O) as a reducing agent; Sodium hydroxide (NaOH)is used to adjust the PH of the alkaline; Sodium tartrate (C4H4O6Na2) is the dispersant; Copper sulfate (CuSO4 ? 5H2O) is the nucleating agent. Citric acid C6H8O7 ? H2O) is the complexing agent; Different seed silver nitrate (AgNO3) and cobalt sulphate (CoSO4 ? 7H2O) to react. At different temperatures, different concentrations of the reactants, different concentration of reducing agent and different types of nucleating agents conducted experiments. The results show that, Concentration of nickel sulphate reaction 0.6mo / L, Hydrazine concentration of 3.0mol / L, Reaction temperature at 80 ℃ for the best response, The best reaction conditions. When the reaction of silver nitrate when the nucleating agent was better than copper sulfate, cobalt sulfate better. KEY WORDS: nickel sulfate, Temperature, concentration,seed 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc264006166 第一章 引 言 PAGEREF _Toc264006166 \h 1 HYPERLINK \l _Toc264006167 §1.1 镍的简介及世界镍资源分布、交易情况 PAGEREF _Toc264006167 \h 1 HYPERLINK \l _Toc264006168 §1.1.1 镍的简介 PAGEREF _Toc264006168 \h 1 HYPERLINK \l _Toc264006169 §1.1.2世界镍资源分布、交易状况 1 HYPERLINK \l _Toc264006174 §1.2 超细镍粉的制备方法 PAGEREF _Toc264006174 \h 2 HYPERLINK \l _Toc264006175 §1.2.1气相法 PAGEREF _Toc264006175 \h 2 HYPERLINK \l _Toc264006176 §1.2.2液相法 3 HYPERLINK \l _Toc264006177 §1.2.3电解法 5 HYPERLINK \l _Toc264006178 §1.2.4固相法 6 HYPERLINK \l