铈酸钡纳米粉体的制备 毕业论文.doc

毕业论文题目: 铈酸钡纳米粉体的制备学生: 学号: 200 908040120 院(系): 化学与化工学院专业: 化学指导教师: 20 13年5月7日 I 铈酸钡纳米粉体的制备摘要以硝酸铈和硝酸钡为原料,采用水热法制备铈酸钡纳米材料,利用扫描电镜对所制备的样品进行了表征。实验结果表明,螯合剂种类,溶液 PH 值,反应时间对铈酸钡的形貌有很大的影响。关键词: 铈酸钡,水热法,乳酸,无水乙醇,氢氧化钾 II The preparation of barium cerate ABSTRACT The barium cerate nano-powder was prepared through hydrothermal method by using lactic acid as chelating agent, Ba (NO 3) 2 and Ce (NO 3) 2 as barium source and cerate source, respectively . The morphology of as-prepared samples can be detected via s canning electron microscope . In the synthesis process, it can be known that allof the time of reaction, PH value, and the chelating agent can exert great influence on the morphology of barium cerate nano-power. KEY WORDS: barium cerate, h ydrothermal method ,l actic acid , potassium hydroxide III 目录 1 文献综述........................................................................................................................................................ 5 前言..................................................................................................................................................... 5 纳米材料发展史及其特性..................................................................................................... 6 纳米材料特性......................................................................................................................... 6 纳米材料的前景.................................................................................................................... 10 钙钛矿型氧化物.............................................................................................................................. 10 钙钛矿型氧化物的晶体结构............................................................................................... 10 钙钛矿型氧化物性能及其应用........................................................................................... 11 钙钛矿型氧化物的制备方法............................................................................................... 12