摘要
采用溶胶-凝胶法制备Ce_(0.8)Gd_(0.15-x)Nd_(x)Ca_(0.05)O_(2-δ)电解质粉体。研究了在Gd^(3+)、Nd^(3+)和Ca^(2+)总掺杂量(20 mol%)不变时,Gd^(3+)和Nd^(3+)共掺杂浓度对氧化铈电解质陶瓷材料结构和电性能的影响。同时,采用X射线衍射分析(X-ray diffraction)、拉曼分析(Raman)、X射线光电子能谱(X-ray Photoelectron Spectroscopy)、紫外可见光谱(UV-Visible Spectrophotometer)等分析测试方法分别对合成样品的结构进行表征。研究结果表明,经800℃焙烧3 h后的电解质粉体,形成了立方萤石结构的单相固溶体。陶瓷片的相对密度达到95%以上。Nd掺杂量x为0.10时的电解质氧空位浓度最大,且在700℃下,组分为Ce_(0.8)Gd_(0.05)Nd_(0.10)Ca_(0.05)O_(1.875 )的电导率最高,其数值为2.04×10^(-2 )S·cm^(-1)。
Ce_(0.8)Gd_(0.15-x)Nd_(x)Ca_(0.05)O_(2-δ) electrolyte powder was prepared by using sol-gel method.The effect of Gd^(3+) and Nd^(3+) co-doping on structure and electrical properties of the cerium oxide electrolyte was studied,when the total doping amount of Gd^(3+),Nd^(3+)and Ca^(2+) was fixed(20 mol%).X-ray diffraction(XRD),Raman,X-ray photoelectron spectroscopy(XPS)and UV-visible spectrophotometer were used to characterize the samples.It is shown that the electrolyte powder calcined at 800℃for 3 h is a single phase solid solution with cubic fluorite structure.Relative density of ceramic sheet is>95%.As the doping content x of Nd was 0.10,oxygen vacancy concentration of the electrolyte was maximized.At 700℃,Ce_(0.8)Gd_(0.05)Nd_(0.10)Ca_(0.05)O_(1.875 )had highest conductivity(2.04×10^(−2)S·cm_(-1)).
作者
杨琛宇
周芬
包金小
郜建全
宋希文
YANG Chenyu;ZHOU Fen;BAO Jinxiao;GAO Jianquan;SONG Xiwen(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China)
出处
《陶瓷学报》
CAS
北大核心
2022年第5期908-916,共9页
Journal of Ceramics
基金
内蒙古自然科学基金(2021LHMS05025)。
关键词
氧化铈基电解质
溶胶—凝胶
电化学
电导率
cerium oxide based electrolyte
sol-gel
electrochemistry
electrical conductivity
