载体用高比表面超细二氧化锆的制备及结构表征
发布时间：2018-11-25 18:13
【摘要】：以氧氯化锆溶液为前驱体,一定量的PEG-600为分散剂,氨水为沉淀剂,通过化学沉淀法合成氢氧化锆沉淀。经后续洗涤、过滤、干燥和焙烧制得二氧化锆粉体材料。经过单因素实验确定沉淀法各工艺参数的影响范围,以单因素实验确定的主要因素设计正交实验,寻找制备高比表面超细二氧化锆的最佳工艺条件。通过正交实验结果分析可得:最佳工艺条件为氧氯化锆浓度为0.6 mol/L,氨水的pH为11.5,反应温度为55℃,焙烧温度为400℃。对正交实验最佳工艺条件下制得的二氧化锆进行了粒度检测和BET、SEM表征,结果发现:产品粒度微小均匀,平均粒径为1.3μm,孔结构丰富,表面粗糙呈菜花状,比表面积可达214 m2/g,符合作载体的基本要求。
[Abstract]:Zirconia hydroxide precipitation was synthesized by chemical precipitation with zirconium oxychloride solution as precursor, certain amount of PEG-600 as dispersant and ammonia water as precipitant. Zirconia powder was prepared by subsequent washing, filtration, drying and roasting. The influence range of each technological parameter of precipitation method was determined by single factor experiment. The orthogonal experiment was designed with the main factors determined by single factor experiment to find out the best technological conditions for preparing ultrafine zirconia with high specific surface. The results of orthogonal experiment showed that the optimum conditions were as follows: pH of 0.6 mol/L, ammonia solution, reaction temperature of 55 鈩，
本文编号：2356998
[Abstract]:Zirconia hydroxide precipitation was synthesized by chemical precipitation with zirconium oxychloride solution as precursor, certain amount of PEG-600 as dispersant and ammonia water as precipitant. Zirconia powder was prepared by subsequent washing, filtration, drying and roasting. The influence range of each technological parameter of precipitation method was determined by single factor experiment. The orthogonal experiment was designed with the main factors determined by single factor experiment to find out the best technological conditions for preparing ultrafine zirconia with high specific surface. The results of orthogonal experiment showed that the optimum conditions were as follows: pH of 0.6 mol/L, ammonia solution, reaction temperature of 55 鈩，
本文编号：2356998
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