液相转化法制备纳米级二氧化锆

Preparation of nanometer zirconium oxide via liquid-state transformation method

以ZrOCl2·8H2O和NH4HCO3为原料,先在溶液中进行反应制备得氧化锆前驱体碳酸氧锆,再用水洗涤前驱体并烘干。然后将前驱体在450℃下热解即得氧化锆产品。考察了有关因素对制备氧化锆的影响,例如氯氧化锆与碳酸氢铵质量比,反应温度,反应时间,反应物浓度,表面活性剂用量,煅烧温度及煅烧时间。获得了最佳工艺条件,在此条件下锆的回收率达99.96%,产品平均粒径约为50nm。

With ZrOCl2 &middot 8H2O and NH4HCO3 as raw materials, precursor of ZrO2 was obtained via liquid-state transformation method, then the precursor was washed with water and dried. ZrO2 was obtained by thermal decomposition of precursor at 450°C. Various factors affecting preparation of ZrO2 were investigated, such as molar ratio of ZrOCl2 &middot 8H2O to NH4HCO3, reaction temperature, reaction time, concentration of reactants, consumption of the surfactant, calcining temperature and time, etc. The optimum conditions for preparing ZrO2 were obtained. Under such conditions the recovery of 99.96% for Zr was obtained, and particle diameter of product was about 50 nm.