为研究不同溶胶前躯体体系对制备纳米ZnO粉体粒径大小的影响,采用溶胶-凝胶法分别研究了硬脂酸体系、草酸体系、高分子网络体系制备纳米ZnO粉体,并利用TC-DTA、XRD、TEM对其结构、形貌和粒径进行了表征.在3种体系中,高分子网络体系所得粉体粒径最小,粒径在30～40 nm,粒径大小均匀,团聚较少.硬脂酸体系得到znO粉末粒径较小,范围分布在30～50 nm,分散性较好.草酸体系制得znO粉末粒径相对较大,在40～60 nm,有轻微团聚.
In order to study the influence of different sol-gel precursor systems on the size of nanometer ZnO particles, nanometer ZnO powders were prepared by stearic acid system, oxalic acid system and polymer-network gel system. The crystallite structure, morphology and particle size were characterized by TG-DTA, XRD and TEM. Results indicate that the particle sizes of ZnO powders obtained by polymer-network gel system are the smallest, and particles exhibit the best dispersion as well as uniform distribution with diameter in the range of 30 ～ 40 nm among the prepared ZnO powders. The particle sizes obtained by stearic acid system are smaller, and particles exhibit better dispersion with diameter in the range of 30 ～50 nm. The particle sizes obtained by oxalic acid system are relatively bigger, and particles exhibit slight agglomeration with diameter between 40 nm and 60 nm.
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