摘要
利用溶胶-凝胶方法在800℃焙烧10h后,合成了固溶体Ce1-xNdxO2-δ(x=0.05～0.55),X射线衍射(XRD)测试表明固溶体已经形成立方萤石结构;电子顺磁共振谱(EPR)研究表明在固溶体Ce1-xNdxO2-δ中随着掺杂量x的增大,Ce3+离子含量减少,说明掺杂Nd3+离子可以抑制Ce4+的还原;交流阻抗谱的测量表明固溶体Ce0.9Nd0.1O2-δ具有离子导电特性,600和700℃时的电导率分别为4.25×10-3和1.12×10-2S?cm-1,活化能为0.68eV.
Solid solutions Ce1-xNdxO2-δ （x=0.05-0.55） were prepared by sintering the gel at 800 ℃ for 10 h by sol-gel method. XRD showed that solid solutions Cel-xNdxO2-δ were crystallized in a cubic fluorite structure. The electron paramagnetic resonance spectra suggested that the content of Ce^3＋ ions is decreased with the increasing dopant content x in the solid solutions Ce1-xNdxO2-δ, which suggested that doping with lower valence Nd^3＋ ions may control the redox of Ce^4＋ ions in the solid solutions. The impedance spectra of the solid solutions showed ionic conduction. The conductivities of Ce0.9Ndo.1O2-δ were 4.25 × 10^-3 and 1.12 × 10^-2 S.cm^-1 at 600 and 700 ℃ respectively, and activation energy was 0.82 eV.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2007年第10期989-993,共5页
Acta Chimica Sinica
基金
国家自然科学基金(No.10374022)
吉林省教育厅及北华大学科研基金资助项目.
