摘要
采用溶胶-凝胶燃烧法合成出Cr3+:Al2O3纳米粉体。将所制成的干凝胶加热至约500℃使之发生燃烧反应,再将燃烧产物在不同的温度下进行锻烧。利用热重-差热分析、X射线衍射(X-ray diffraction,XRD)、透射电子显微镜(transmission electron microscope,TEM)等对干凝胶及煅烧粉体进行表征,测试了纳米粉体的发光性能。研究了合成条件对粉体分散性、发光性能的影响。XRD和TEM分析表明:在1000℃煅烧1h后,粉体为α-Al2O3结构的单相氧化物粉体,颗粒大小为20~35nm。在制备溶胶时添加聚乙二醇可提高粉体的分散性。光谱分析表明:Cr3+:Al2O3纳米粉体的激发峰位于404nm和540nm,发射峰值位于692nm和668nm。
Cr3+:Al2O3 nanometer powders were prepared by sol-gel combustion synthesis.The dry gel was fired at 500 ℃ to initiate combustion,and then Cr3+:Al2O3 powders were formed when the combustion ashes were calcined subsequently at different tempera-tures.Thermogravimetric-differential thermal analysis,X-ray diffraction(XRD) and transmission electron microscopy(TEM) were employed to characterize the dry gel and powders.The luminescent properties of the nanometer powders were measured.The effects of synthesis condi...
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2009年第2期243-246,252,共5页
Journal of The Chinese Ceramic Society
基金
长春理工大学科研发展基金(XJJ2005-02)资助项目
关键词
溶胶-凝胶
铬离子
氧化铝
燃烧合成
纳米粉体
发光性能
sol-gel
chromium ion
alumina
combustion synthesis
nanometer powders
luminescence properties