摘要
采用聚丙烯酰胺凝胶法制备了大孔α-氧化铝材料.利用X射线衍射仪、扫描电镜、荧光分光光度计表征了所制备的氧化铝样品.结果表明,在1150℃烧结温度下可获得高纯的α-氧化铝陶瓷材料,其形貌呈类电路板型(monolithic)大孔结构.荧光光谱测试分析发现,在228nm波长的光激发下,其荧光光谱在300—400nm范围内由两个主发射带组成,其峰值分别位于330nm和365nm.基于实验结果,探讨了多孔氧化铝的形成机理和发光机制.
Macroporous α-A1203 is synthesized by polyacrylamide gel technique. X-ray diffractor combined with a photoluminescence spectrophotometer is used to investigate the formation of A1203 phase and the light emission properties of xerogel sintered at different temperatures. It is demonstrated that high-purity α-AleO3 can be obtained at a sintering temperature of 1150 ℃. Scanning electron microscopy images reveal that the synthesized α-A1203 has a monolithic structure. Photoluminescence spectra show that a major emission band around 365 nm and a weaker side band around 330 nm are observed when the excitation wavelength is 228 nm. The pore-formation and luminescence mechanisms of porous alumina are discussed based on the experimental results.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第1期328-333,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10904008)
国家自然科学基金委员会-中国工程物理研究院联合基金(批准号:11076008)资助的课题~~
关键词
Α-氧化铝
大孔结构
聚丙烯酰胺凝胶法
发光性能
α-alumina, macroporous structure, polyacrylamide gel technique, luminescence properties
