作　　者： ; ; ; ; ; (苏鹏）;

机构地区： 广西大学化学化工学院

出　　处： 《应用化工》 2006年第5期335-338,共4页

摘　　要： 氯氧化铋经碳酸钠溶液二次脱氯转型后得到氧化铋前驱体碳酸氧铋,将其烘干,进行热解,即得氧化铋产品。考察了Na2CO3用量、搅拌时间、转化温度、固液比、pH值等对脱氯的影响。采用TG/DSC、XRD和红外光谱对前驱体及其热解产品进行表征,确定最佳的热解温度。结果表明,最佳的脱氯工艺条件为:氯氧化铋3.0 g,NaCO33.0 g,加水25 mL,转化温度45℃,搅拌时间25 m in;最佳热解条件580℃热解2 h。在最佳工艺条件下得到的氧化铋产品平均一次粒径约为67 nm,含氯量为0.43%。 First of all, precursor was obtained when BiOCl was transformed via two steps and chloride was removed with the help of Na2CO3· solution, then product Bi2O3 was obtained via thermal decomposition of precursor. Effect of various factors on removing chloride were investigated, such as the amount of Na2CO3, mixing time, transforming temperature, ratio of solid to liquid, etc. The optimum conditions for removing chloride were as follows：the amount of bismuth oxychloride and Na2CO3 were 3.0 g respectively, water was 25 mL, transformation temperature was 45℃, stirring time was 25 min, thermal decomposite for 2 h at 580℃. Precursor and its products of thermal decomposition were characterized via TG/DSC, XRD and IR. At the same time, the optimum temperature of thermal decomposition was confirmed. Under optimum conditions, average particle diameter of Bi2O3 was about 67 rim, and chlorine amount in Bi2O3 was 0.43%.

关 键 词： 氯氧化铋 氧化铋 纳米 液相转化 制备

领　　域： [一般工业技术] [电气工程] [一般工业技术]