中文摘要：

由于纳米氧化锌的功能和用途不同，因而需要制备如不同平均粒径的纳米氧化锌。论文以六水硝酸锌为原料，尿素为沉淀剂，研究了均匀沉淀法制备不同平均粒径纳米氧化锌的工艺条件，讨论了工艺条件对其粒径和产率的影响规律。结果表明：通过均匀沉淀法制备的纳米氧化锌的前驱体为Zn5（OH）6（CO3）2；制备的纳米氧化锌为六方晶系的球形颗粒，平均粒径为20-50nm；纳米氧化锌的产率随反应物浓度的增大、反应温度的升高、反应配经（n尿素/Zn2＋）的增大而增大；纳米氧化锌颗粒的平均粒径随反应物浓度的减小、反应温度和煅烧温度的降低而减小。

英文摘要：

Because the application purposes of nano-ZnO are different and different average diameters of nano-ZnO is needed. In the paper, process conditions of homogeneous precipitation were investigated to prepare different average diameters of nano-ZnO by the reaction of the Zinc nitrate and urea. And the effects of process conditions on the diameters and yield of nano-ZnO were discussed. The results showed that： the precursor of nano-ZnO was Zns（OH）6（CO3）2; the structure of nano-ZnO was hexagonal system and approximative spherical and the average nano-particle diameters was from 20 nm to 50 nm; the yield of nano-ZnO increased respectively with the increasing of the concentrations of the reactants, with the reaction temperature and with the molar rate of urea to Zinc ion; and nano-ZnO particle size decreased respectively with the decreasing of the concentration of reactant, with the reaction temperature and with calcination temperature.