钛酸钡和十三钛酸钡的水热法合成  

Synthesis of barium titanate and barium 13-titanate by hydrothermal method

作　　者：徐军[1] 许杰[1] 孔旗 

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430074

出　　处：《武汉工程大学学报》2015年第6期42-45,共4页Journal of Wuhan Institute of Technology

基　　金：武汉工程大学研究生教育创新基金项目(CX2013093)

摘　　要：钛酸钡是具备高介电常数、低损耗的铁电材料,十三钛酸钡是具有低介电常数、高品质因子的微波介电材料,目前为止鲜有利用水热法合成单相十三钛酸钡的相关研究报道.以一水合氢氧化钡和四氯化钛为反应原料,通过控制钡/钛摩尔比,利用水热法制备得到了钛酸钡和十三钛酸钡,研究了钡/钛摩尔比对反应产物的影响.采用X射线粉末衍射仪检测所得产物的相成分,利用扫描电子显微镜观察利用水热法制备得到的十三钛酸钡的形貌.结果表明,当钡/钛摩尔比为1∶1时,水热反应产物为钛酸钡.当钡/钛摩尔比为1∶4时,水热反应产物为非晶相,经过晶化热处理后得到十三钛酸钡.且所制备得到的十三钛酸钡为不规则块状,粒径大小在0.3μm到1μm之间,有一定的团聚现象.Barium titanate is a lead-free ferroelectric material which has high dielectric constant and low dielectric loss. Barium 13-titanate is a kind of microwave dielectric material which has low dielectric constant and high-quality factor. So far, there are few literature reports on preparation of single-phase barium 13-titanate by hydrothermal method. In this paper, the barium titanate and Barium 13-titanate were synthesized by hydrothermal method, using barium monohydrate and titanium tetrachloride as raw materials. The influ- ence of Ba/Ti molar ratio on the reaction product was studied. The specimens were characterized by powder X-ray diffraction. The morphology of Barium 13-titanate was characterized by scanning electron microscopy. Barium titanate is obtained when the Ba/Ti molar ratio is 1：1. The hydrothermal product is amorphous phase, which turns to crystalline Barium 13-titanate after crystallized by post heat treatment, when the Ba/Ti molar ratio is 1：4. The scanning electron microscopy image of the obtained barium 13-titanate shows that the particles are in shapes of irregularity and sizes of 0.3-1 μm, with some agglomeration.

关 键 词：铁电材料 微波介电材料 非晶相 水热法 

分 类 号：TB35[一般工业技术—材料科学与工程]