制备工艺对钛酸钴纳米粉体结晶性能和显微结构的影响  

Effect of Preparation Process on Crystallization and Microstructure of Nano-CoTiO_3 Powder

作　　者：卢靖[1] 黄剑锋[1] 吴建鹏[1] 冀涛[1] 

机构地区：[1]教育部轻化工助剂化学与技术重点实验室陕西科技大学,西安710021

出　　处：《硅酸盐学报》2011年第10期1531-1535,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50772063);陕西科技大学校级项目(ZX09-16)资助

摘　　要：采用水热法,以TiCl3、Co(CH3COO)2.4H2O为原料制备了纳米钛酸钴(CoTiO3)粉体。用X射线衍射、激光Raman光谱、扫描电子显微镜、透射电子显微镜分析了水热温度、前驱体溶液pH值、水热时间对CoTiO3晶相、生长取向和显微结构的影响。结果显示:升高水热温度至280℃有利于CoTiO3结晶性能的提高,促进了晶体由(110)向(104)晶面取向生长的转变。pH值在8.0～10.0范围内,粉体经历了"片状-颗粒状-片状"的形貌变化,pH>9.0时,CoTiO3的纯度和结晶度下降。适当延长反应时间至24h有利于CoTiO3结晶性能的提高。A nano-powder of CoTiO3 was prepared with TIC13 solution and Co（CH3COO）24H20 as raw materials by a hydrothermal process. The effects of hydrothermal temperature, pH value of precursor and reaction time on the microstructure and orientation of CoTiO3 were investigated. The prepared powder was characterized by X-ray diffraction, laser Raman spectroscopy, scanning electron microscope and transmission electron microscope, respectively. The results show that a higher temperature can favor the （104）-orientation and crystallization. The morphology of CoTiO3 varied in a flake-granular-flake route in the pH range from 8.0 to 10.0. The purity and crystallization of CoTiO3 decrease when the pH〉9.0. The CoTiO3 phase became more intensive when the reaction time increased to 24h.

关 键 词：钛酸钴 水热法 结晶性能 显微结构 

分 类 号：TQ174[化学工程—陶瓷工业]