全文下载：2012060551
孙伟1， 吴大雄1， 敬承斌2*
（1.青岛科技大学 材料科学与工程学院， 山东 青岛 266042；2.华东师范大学 基地材料与器件教育部重点实验室， 上海200241）
摘要： 在室温下，通过酸诱导液相沉积的方法，制备出了二氧化锗（GeO2）颗粒。制得的GeO2颗粒通过扫描电子显微镜（SEM），透射电子显微镜（TEM）和X射线衍射（XRD）进行表征。实验结果表明，向前驱液中加入酸，可以诱导锗酸根离子转化成立方体型的GeO2颗粒析出。而向反应液中再加入少量的聚乙烯吡咯烷酮（PVP）后，会析出纺锤体型的GeO2晶体颗粒。
关键词: 二氧化锗； 酸诱导液相沉积法； 聚乙烯吡咯烷酮； 纺锤体型颗粒
中图分类号： TB 321 文献标志码： A
收稿日期：2012-02-23
基金项目： 国家自然科学基金资助项目（50802046）.
作者简介： 孙伟（1987—），女，硕士研究生.*通信联系人.
Effects of PVP on the Morphology Evolution of GeO2 Particles
Precipitated from an Acidized Aqueous Germanate Ion Solution
SUN Wei1, WU Da-xiong1, JING Cheng-bin2
(1.College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China；2.Key Laboratory of Polar Materials and Devices, Ministry of Education,EastChinaNormalUniversity,Shanghai200241,China)
Abstract: GeO2 particles were synthesized at an early stage of room temperature acid-induced homogenous liquid phase precipitation process. With addition of polyvinyl pyrrolidone (PVP), the spindle-like GeO2 particles were obtained. The microstructure of GeO2 crystals were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The results indicate that adding acids can induce germanate ions to precipitate GeO2 cube particles. With addition of PVP, the precipitated GeO2 particles have spindle-like shapes. The morphologies of GeO2 particles induced by the addition of surfactant and the growth mechanism conform to BFDH and HP crystal growth patterns.
Key words: germanium dioxide; acid-induced liquid phase deposition; polyvinyl pyrrolidone; spindle-like particles
