用柠檬酸盐法合成了ZnO纳米晶,研究了不同灼烧温度及同一温度不同灼烧时间对ZnO纳米晶晶化过程的影响,探讨了合成ZnO纳米晶的最佳实验条件.用X射线衍射、红外光谱、热失重、差热、透射电镜等实验手段对ZnO纳米晶进行了研究.实验结果表明,用柠檬酸盐法制得的ZnO纳米晶属立方晶系,形貌为球形,纯度高,粒径分布均匀,平均粒径20nm. ZnO nanocrystals were synthesized by citrate method, and the effects of different burning temperatures and burning times at the same temperature on the crystallization process of ZnO nanocrystals were studied, and the optimum experimental conditions for the synthesis of ZnO nanocrystals were discussed. X-ray diffraction , Infrared spectroscopy, thermogravimetry, differential thermal analysis, transmission electron microscopy and other experimental methods ZnO nanocrystals were studied.The experimental results show that the citrate ZnO nanocrystals are cubic system, spherical morphology, high purity, Particle size distribution, the average particle size of 20nm.