摘要
采用气相传输法制备出微纳结构的氧化锌，通过扫描电子显微镜、X-射线衍射仪和透射电子显微镜等对样品结构进行表征，研究样品形貌与生长区温度间的关系，结果表明，以高纯度锌粉末为原料，控制蒸发区温度800℃、生长区温度在450—600℃之间变化，可有效实现对样品形貌的控制。进一步的理论分析表明，温度变化决定着晶体生长过程中的晶核数量、临界半径、生长方式和生长速度等参数。
Micro-nano ZnO samples were fabricated by vapor-phase Transport （VPT） method, the samples were charac- terized by scanning electron microscopy,x-ray diffraction and high-resolution transmission electron microscopy. The Ex- perimental results indicated that using pure Zn powder as raw material, the morphology of samples can be controlled with evaporated area temperature about 800℃ and growth area temperature ranging from 450 to 600℃. In addition, theoretical analysis indicated that the growth parameters, such as critical radius, number of nucleation and ratio of grain growth can be determined by the temperature in growth region.
基金
国家自然科学基金项目（No.10674023）.安徽省自然科学基金项目（No.11040606M10）,淮阴工学院重点项目fNo.HGA0013）
关键词
氧化锌
气相传输法
临界半径
过饱和度
ZnO
vapor-phase transfer method
critical radius
super-saturation ratio
