摘要
采用溶胶-凝胶法合成Ce1-xErxO2-δ（x=0．00～0．30）系列固体电解质，系统地研究了其晶体结构和导电性。X-射线衍射（XRD）结果表明：所有Ce1-xErxO2-δ粉体经800℃焙烧2h后，均结晶为立方萤石结构，其平均晶粒尺寸为32-43m，晶胞参数与掺杂量的非线性关系与掺杂离子半径、氧空位及缺位缔合有关．阻抗谱表明：适当掺杂Er离子可提高CeO2基材料的电导率，并在x=0．10时电导率达到最大值，活化能最／b（σ7000℃=2．56×10^-2S·cm-1，Ea=0．92eV）。
A series of solid electrolytes Ce1-xErxO2-δ（x=0. 00-0. 30）was prepared by sol-gel method. The structure and electrical properties of the solid solution were systematically studied. XRD date showed that the samples were all the cubic fluorite structure at 800℃, the average crystallite sizes were between 32 and 43 nm. There was a non-linear relationship between the lattice parameters and the content of Er,as expected from the doping ionic radius, the oxygen vacancy and the formation of va- cancy association. Impedance spectra analyses showed that co-doping with appropriate ratio of Er can further improve the electrical performance of ceria-based electrolytes. And the maximum of conductivity was found at x=0. 10（σ700℃=2. 56×10^-2 S·cm-1 ,Ea =0. 92 eV）.
出处
《大学物理实验》
2011年第3期1-4,12,共5页
Physical Experiment of College
基金
吉林省教育厅科研基金项目(200690)
