【论文】多孔钛酸钡粉体的制备研究.docxVIP

多孔钛酸钡粉体的制备研究摘要：本论文采用了溶胶-沉淀法，以十六烷基三甲基氯化铵(C16TMAC)为模板剂，以氯化钡（BaCl2）和四氯化钛(TiCl4)为原料在溶液中制备得到了具有多孔结构的纳米钛酸钡(BaTiO3)，煅烧除去模板剂后得到最终的粉体。本文也探究了加料顺序、加料速度、回流时间、水热与否等因素对多孔钛酸钡粉体形态、粒径分布以及性质的影响，并确定了较佳的工艺条件。同时使用了TEM、HRTEM、XRD、TG-DSC以及BET等手段表征粉体。研究结果表明：采用慢速、酸滴入碱的滴加方式，经过8小时回流可获得平均粒径为60nm、分布均匀的具有多孔结构的钛酸钡粉体。洗涤煅烧后，对得到的粉体进行了BET表征测得其比表面积为41.26m2/g。本方法原料易得，操作比较容易，是合成具有孔结构的多金属氧化物的一个有效方法。关键词：溶胶-沉淀，多孔，钛酸钡Synthesis of Multiporous Barium TitanateAbstract:Multi-porous BaTiO3 was synthesized through sol-precipitation method from the solution. In this process, cetyltrimethylammonium chloride (C16TMAC) acted as the template, barium chloride (BaCl2) and titanium tetrachloride (TiCl4) acted as the raw materials. The final multi-porous power was achieved by removing the template via calcination. The article also explored the influence of various factors, such as dropping rate, adding order, reflux time and hydrothermal method, on the morphology、size distribution and property of the final powder and set up the optimized technological conditions. We use TEM, HRTEM、wide-angle XRD, TG-DSC and BET to characterize the powder. The study showed that using the optimized conditions, we could achieve multi-porous barium titanate powders with the average grain size of 60nm and with excellent size distribution. A specific surface area of 41.26m2/g was obtained using BET after the washing and calcination of the powder. In this method, the raw materials were common and operation was quite easy. Therefore, it is an efficient way to synthesize porous multi-metallic oxide.Keyword: sol-precipitation, multi-porous, barium titanate目录第1章 文献综述71.1引言71.2 钛酸钡71.2.1 钛酸钡在生产生活中的应用71.2.2 钛酸钡的制备方法71.3 金属氧化物介孔材料81.3.1 介孔材料的特点81.3.2 多孔材料的合成方法91.3.3 多孔材料的形成机理101.3.4 介孔材料的在生产生活中的应用111.4 介孔钙钛矿材料的合成及改性111.4.1 多孔钛酸钡的合成111.4.2 其他钙钛矿多孔材料的合成和改性12第2章 研究计划142.1 研究内容及难点分析142.2 实验原料设备及表征142.2.1 实验原料142.2.2 实验仪器152.2.3 样品的表征152.3 基本原理及工艺流程152.3.1 基本原理152.3.2 工艺流程图16第3章 实验过程及结果分析173.1 实验过程173.2 XRD分析183.3 TG-DSC分析193.4 TEM分析203.4.1 反应微观机理的分析203.4.2