直接沉淀法合成超细氧化锌的研究

Study on synthesis of ultra-fine ZnO By direct precipitation method

以氯化锌为原料 ,草酸铵为沉淀剂 ,采用直接沉淀法制备超细氧化锌 ,对氧化锌的前驱体 -草酸锌的合成以及焙烧工艺进行了详细研究。试验讨论了反应温度、反应物浓度、溶液 pH值和沉淀反应时间等因素对草酸锌粒度的影响 ,以及焙烧过程中被烧温度与被烧时间对氧化锌粒度的影响 ,结果发现 ,在严格控制上述工艺参数的条件下 ,可以获得粒度 <70nm的氧化锌产品。

Ultra-fine ZnO particle was synthesised by using a direct precipitation method, Zinc chloride as the raw material and ammonium oxalate as the precipitation agent. The synthesis and calcination process of ZnO precursor-oxalate zinc has been studied in details. Factors of reaction temperature、concentration、pH value and reaction time affecting oxalate zinc particle size were studied in this paper so as to calcination temperature and calcination time. It was found that zinc oxide with particle size no more than 70nm can be prepared by strictly controlling such process parameter.