摘要
使用无水葡萄糖作为有机溶剂,尿素作为助剂,采用绿色环保的美拉德法一步合成了纳米钆掺杂的氧化铈晶体(Gd0.2Ce0.8O1.9,GDC)。通过TG/DSC、XRD、Raman spectroscopies、FESEM、in-situ XRD和交流阻抗谱等技术手段对合成的GDC材料进行结构和性能表征。结果表明,合成的GDC粉末具有单一的立方萤石结构,在10~50 nm范围内形成尺寸可调、粒径分布窄、结晶度高的纯相纳米颗粒。800℃煅烧的粉体经1550℃烧结后可以得到平均晶粒尺寸为3μm,晶界数量较少的致密GDC电解质片,其具有较好的电化学性能和结构稳定性。本文工作表明美拉德法适用于GDC的合成。
Nanocrystalline powder of gadolinium-doped-ceria(Gd0.2Ce0.8O1.9,GDC)was successfully synthesized by one step,low cost and environment friendly maillard method,using glucose as organic solvent and urea as addictives.The synthesized GDC powders were analyzed by a range of techniques including TG/DSC,XRD,Raman spectroscopies,FESEM,in-situ XRD and electrochemical impedance.The results reveal that the synthesized powder has a single cubic fluorite structure and forms pure-phase nanoparticles with adjustable size,narrow particle size distribution,and high crystallinity in the range of 10-50 nm.After sintering at 1550℃,the dense GDC electrolyte pellets with an average grain size of 3μm and small number of grain boundaries is obtained which is pre-sintered at 800℃.They have superior electrochemical performance and structural stability.The test results above prove that Maillard method is suitable for the synthesis of GDC.
作者
张铭江
杜丽莎
卢劲燃
谭媛
熊春艳
ZHANG Mingjiang;DU Lisha;LU Jinran;TAN Yuan;XIONG Chunyan(Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China;School of Physics and Information Engineering, Jianghan University, Wuhan 430056, China)
出处
《人工晶体学报》
EI
CAS
北大核心
2020年第6期1134-1139,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(51702239,51772114,51601173)
华中科技大学材料成型与模具技术国家重点实验室开放课题研究基金(X19D003)
武汉工程大学大学生校长基金(2019001)。
关键词
纳米晶体
钆掺杂氧化铈
美拉德法
电解质
电化学阻抗
nanocrystalline
gadolinium-doped ceria
maillard method
electrolyte
electrochemical impedance
