以正硅酸乙酯、氨水和去离子水为原料,采用水解缩合法在不同醇作溶剂的条件下合成亚微米级二氧化硅微球。用傅里叶变换红外光谱仪(FT-IR)及场发射扫描电镜(SEM)对其微观结构和形貌进行表征。着重研究反应介质对二氧化硅微球的影响。结果表明,随着溶剂分子中碳原子数的增加,反应所得粒子的粒径越大,其球形度也越好,为制备不同粒径、均匀的单分散二氧化硅微球的研究奠定了基础。 Submicron silica microspheres were synthesized by hydrolytic condensation method using tetraethoxysilane, ammonia and deionized water as raw materials. The microstructure and morphology were characterized by Fourier transform infrared spectroscopy (FT-IR) and field emission scanning electron microscopy (SEM). Focus on the reaction medium on silica microspheres. The results show that with the increase of the number of carbon atoms in the solvent molecule, the larger the particle size of the reaction is, the better the sphericity is, which lays a foundation for the preparation of monodisperse silica microspheres with different particle sizes and uniform distributions. .