Abstract: ZnO nanoparticles were obtained by calcination of precursor，which was synthesized by solid-state reaction using Zn(CH3COO)2?2H2O and H2C2O4?2H2O as raw materials，with muffle furnace and microwave furnace. Thermogravimetry/differential thermal(TG/DTA)，Transmission electron microscope(TEM)，Fourier transform-infrared spectra (FT-IR) and X-ray diffraction (XRD) were used to characterize the structure of precursor and the ZnO nanoparticles. The influences of calcination temperature and time on the grain size of ZnO nanoparticles were investigated. The results indicate that the precursor is ZnC2O4?2H2O，the grain size of ZnO nanoparticles calcined by microwave furnace is larger than that treated with muffle furnace under the same conditions. The average grain growth exponents of ZnO prepared by microwave heating and conventional calcination are 6.114 and 6.858，respectively. Their average grain growth activation energies are 70.67 kJ/mol and 52.13 kJ/mol，respectively.

Key words: synthesis, kinetics, nanoparticles, grain growth, microwave

摘要： 以乙酸锌和草酸为原料，采用低热固相化学反应法制备纳米氧化锌的前体，通过微波和马弗炉两种焙烧方式焙烧制备得到纳米氧化锌，考察了焙烧温度和时间对纳米氧化锌粒径的影响。使用透射电镜、热重-差热、傅里叶变换红外光谱仪和X射线衍射仪对前体和纳米ZnO进行表征；采用晶粒生长动力学唯象理论计算得出纳米氧化锌在这两种焙烧方式下的晶粒生长动力学规律。结果表明，前体为ZnC2O4?2H2O，随着焙烧温度的提高，纳米氧化锌晶粒迅速长大，在相同焙烧温度和时间下，微波焙烧氧化锌的晶粒尺寸要明显大于常规焙烧方式。微波焙烧和常规焙烧下氧化锌的晶粒生长平均动力学指数分别是6.114和6.858，晶粒生长的平均活化能分别为70.67 kJ/mol和52.13 kJ/mol。

关键词: 合成, 动力学, 纳米粒子, 晶粒生长, 微波