铟锡氧化物纳米粉体的低温溶剂热法制备

Low Temperature Solvent Thermal Synthesis of Indium Tin Oxide Nano-Powder

以氯化铟和氯化锡为原料,氨水为沉淀剂,先用化学沉淀法制备了前驱体,然后将该前驱体以乙二醇为溶剂在聚四氟乙烯内衬的反应釜中于低至190℃下反应,获得了铟锡氧化物(ITO)纳米粉体。采用扫描电子显微镜(SEM)、X射线衍射(XRD)及纳米粒度仪Zetasizer Nano-ZS对在不同温度、不同时间下反应的所得的ITO纳米粉体进行了表面形貌、结构和粒度分布等分析。结果表明,制备的ITO纳米粉体为立方晶相,粉体的平均颗粒小于100nm;与已有的ITO纳米粉体制备方法相比,本溶剂热法制备过程无需高温烧结、流程简单,反应过程所需的温度可低至190℃,是迄今为止文献报导制备ITO的最低温度,同时所得产物纯度高、粒度均匀、分散性很好。

Indium Tin Oxide （ITO） nano-powder was prepared with a convenient solvent thermal method. A hydroxide precursor was first prepared from indium chloride and tin chloride by using ammonia as precipitating agent. The samples were characterized with scanning electron microscopy（SEM）, X-ray diffraction（XRD） and Nanoparticle size analyzer（Zetasizer Nano ZS）.The results shows that the ITO nano-powder is cubic crystalline phase, with an average size smaller than 100 nm. Compared with other methods, the present solvent thermal method can produce ITO nano-powders with high purity and uniform particle size. The manipulation is very simple and convenient and no calcination process is needed. The reaction temperature can be as low as 190 %, which is by far the lowest temperature in ITO nano-powder preparation. The sample also gives a good dispersion property benefited from the unique solvent thermal reaction environment.