摘要
采用微波辅助溶胶-凝胶自蔓燃法制备了具有准同型相界组成的0.94Na0.5Bi0.5TiO3-0.06BaTiO3（0.94NBT-0.06BT）粉体,采用X射线粉末衍射、红外光谱、热重-差热等分析手段对粉体进行了分析表征。通过对合成工艺中溶液的pH值、不同络合剂、微波功率等参数的优化,获得了合成单相钙钛矿结构0.94NBT-0.06BT无铅压电纳米粉体的最优工艺参数：使用柠檬酸作为络合剂、溶液pH值为4-6、微波功率为520 W,热处理温度为500℃,合成后的粉体大小均匀,粒度分布在10-20 nm之间。利用红外光谱和热分析探讨了蔓燃反应的合成机理。
0. 94Na0. 5Bi0. 5TiO3-0. 06 BaTiO3（0. 94NBT-0. 06BT） powders compositions in the morphotropic phase boundary（MPB） were prepared by the microwave-assisted sol-gel self-propagating combustion method. The powders were characterized by means of X-ray powder diffraction（XRD）,infrared spectroscopy（IR）,thermo gravimetric（TG） and differential thermal（DTA）. The process parameters,like pH value of the solution,complexing agent and microwave power were optimized to obtain the optimum process parameters. Nanopowders with a pure perovskite structure were synthesized by process of citric acid as complexing agent,pH = 4-6,heated at 500 ℃ and microwave power of 520 W.The as-burnt powders become uniform in size,and the granularity distribution is centralized from 10 nm to 20 nm. The combustion reaction mechanisms were put forward with the help of IR spectra and differential thermal analysis techniques.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2015年第1期161-167,共7页
Journal of Synthetic Crystals
基金
教育部新世纪优秀人才计划(NCET-11-1044)
国家自然科学基金(51372197)
陕西省重点科技创新团队(2014KCT-04)
