【摘要】 通过粒度分布、红外光谱及Zeta电位等研究了氧化共沉淀方法制备掺锑纳米SnO2粉料时表面活性剂聚乙二醇(PEG?6000)的作用机理.采用沉降实验、粘度测定等手段,确定了表面活性剂适宜的使用量.结果表明,聚乙二醇的防团聚性能是通过在纳米粉体的前驱体上吸附、进而主要通过空间位阻稳定机制进行作用的.其使用量的多少直接影响粉体的粒度大小.制备出了团聚程度轻、分散性良好的纳米掺锑SnO2粉料.更多还原

【Abstract】 The function and the mechanism of additive PEG-6000 in the preparation process of Sb-doped SnO2 nano-powder via oxidative-coprecipitation have been studied by means of particle size analysis, IR spectrum, Zeta potential measurement, and sedimentation experiments. The suitable additive amount (0.8%～1.2%, ω) has been determined by means of sedimentation experiments, and viscosity measurements. The experimental results show that agglomeration of precursor is reduced by the steric effect of PEG-6000 adsorbing on it, and the powder product quality is greatly influenced by the added amount of PEG-6000. The well-dispersed Sb-doped SnO2 nano-powder can be obtained by adding suitable amount of PEG-6000 (0.8%～1.2%, ω). This process can be applied in the preparation of other nano-powders with precipitation method as well.更多还原