摘要
采用低成本的无机-有机复合体系的溶胶-凝胶法成功制备出了Y3Al5O12(YAG)纳米粉体.实验中通过将Y(NO3)3和Al(NO3)3按摩尔比3:5溶解于异丙醇中,再加入适量柠檬酸后生成溶胶,经过脱醇、干燥形成纳米胶球前驱体,将其在适当温度下焙烧后生成YAG纳米粉体.在此过程中,采用了独特的循环水真空泵负压脱醇技术,大大缩减了脱醇和干燥时间,由40h降为4h.分别采用XRD,TEM和TG/DTA分析了不同温度下焙烧所得粉体的物相、形貌以及前驱体热分解特性.结果表明,与其它有机和无机体系制备方法相比,得到的YAG粉体颗粒近似球形,细小均匀,平均尺寸为20～40nm,并具有很好的分散性.
YAG nano-sized powder has been prepared by improved sol-gel method successfully. In a experiment, Y (NO3)3·6H2O and Al(NO3)3·9H2O were dissolved into isopropanol with mole ratio of 3:5. Then citric acid C6H8O7·H2O was added to the mixed solution, and the sol was generated. Subsequently, nano-sized gel-ball precursor was produced through negative-pressure deisopaopanol technique, by which the deisopaopanol and drying period has been decreased from more than 40 h to less than 4 h, by vacuum pump with circulating water. Then, the precursor was calcined to powder at different temperatures. The calcined powder was measured by means of XRD, TEM and TG/DTA. The results show that the obtained YAG particle possesses sphere-like shape, uniform size (20-30 nm) and excellent dispersity.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第4期610-612,共3页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50272040)
霍英东青年教师基金资助项目(91046)
四川省杰出青年学科带头人培养基金资助项目(03ZQ026 039)
四川省学术与技术带头人后备人选培养基金资助项目(2200310)
关键词
YAG纳米粉体
改进的溶胶-凝胶法
无机-有机复合体系
Aluminum compounds
Calcination
Differential thermal analysis
Garnets
Grain size and shape
Nanostructured materials
Optical materials
Powders
Sol
gels
Thermogravimetric analysis
Transmission electron microscopy
X ray diffraction analysis
