不同反应时间和浓度对氢氧化钇/氧化钇粉末结构的影响  

Effect of Different Reaction Time and Concentration on the Sturcture of Yttrium Hydroxide/Yttria Powders

作　　者：刘婕妤[1] 余锡宾[1] 卢一鸣[1] 刘洁[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《广东化工》2010年第3期52-54,共3页Guangdong Chemical Industry

基　　金：上海教育委员会科技创新基金(09ZZ136)

摘　　要：采用不同水热反应时间、浓度研究扇形氢氧化钇/氧化钇粉末的结构变化,并用差热分析(TG)、X射线衍射(XRD)、扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)对其晶型结构和形貌进行了表征。结果表明不同的反应时间分别得到立方体、棒状、扇形氢氧化钇粉末,经800℃焙烧2h后氢氧化钇前躯体完全转变成氧化钇,但形貌上没有发生显著变化。结合反应浓度推测了扇形氢氧化钇/氧化钇样品的自组装过程。Fan-shaped yttrium hydroxide/yttria powders were investigated using different reaction times, concentration via hydrothermal method. The as-prepared products were characterized by thermogravimetry（TG）, X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and high resolution transmission electron microscopy （HRTEM）, respectively. The results indicated that cubic, rod, fan-shaped yttrium hydroxide powder can be obtained under different reaction time. The yttrium hydroxide was changed to yttria after heat-treated at 800℃ for 2 h, whereas no significant changes were observed as to its morphology. The self-assembly process was deduced according to the products obtained at various conditions.

关 键 词：水热合成法 氢氧化钇 氧化钇粉末 不同形貌 自组装 

分 类 号：O381[理学—流体力学]