摘要
以MgO和Nb2O5为原料,用高能球磨法制备Mg4Nb2O9前驱体,前驱体经900℃热处理合成Mg4Nb2O9纳米粉体.采用X射线衍射和扫描电镜(Scanning Electron Microscopy,SEM)研究了粉体随合成温度、球磨时间、保温时间的微结构变化和物相转变过程.结果表明,MgO-Nb2O5混合物经60 h高能球磨在900℃保温3 h合成出粒径为50~80 nm的Mg4Nb2O9纳米粉体.高能球磨法制备的粉体在1 200℃可烧结成致密的具有优异性能的Mg4Nb2O9陶瓷.
The Mg4Nb2O9 nanopowders are prepared at 900℃ by high-energy ball-milling.The influences of calcining temperature、milling time and dwell time of the formation temperature on the microstructure and the phase composition of single phase Mg4Nb2O9 powders are investigated by the X-ray diffraction(XRD) and scanning electron microscopy(SEM).It is found that the single phase Mg4Nb2O9 nanopowders grain with the size of 50～80 nm are sythesized at 900℃ for 3 h by high-energy ball-milling method.The dense Mg4Nb2O9 cer...
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第6期23-26,共4页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(50872078)
关键词
高能球磨
纳米粉体
X射线衍射
high-energy ball-milling
nanopowder
X-ray diffraction pattern（XRD）
