摘要：采用固相反应法合成前驱体α-LiNbWO₆,质子交换后得到HNbWO₆粉体,利用粉末X射线衍射、扫描电子显微镜、透射电子显微镜、热重分析及拉曼光谱对HNbWO₆的结构、形貌及热稳定性进行研究。结果表明,制备的HNbWO₆颗粒具有典型层状结构,层间H+以不同水合形式存在,并与层板骨架有着明显的相互作用;随着热处理温度的升高,层间水分子及层板羟基相继脱除,HNbWO₆的特征衍射峰及骨架振动发生明显且有规律的变化。

关键词：层状颗粒；结构特征；热稳定性

Abstract：HNbWO₆ powders were prepared through a proton exchange of theprecursor α-LiNbWO₆,which weresyn the sized by a solid state-reaction method.The micro-structure,morphology and thermal stability were characterized by means of XRD,SEM,TEM,TG-DTG and Raman spectroscopy.The results show that the as-prepared HNbWO₆ particles have a typical layered structure.The interlayer H+ ions exist in different hydrated forms and have a significant interaction with the laminate.The characteristic diffraction peaks and skeleton vibration for the HNbWO₆ change obviously with the removal of the neutral water molecules and crystal water in the interlayer as the temperature increases.

Keywords：layered particles;structuralcharacteristic;thermalstability