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| Ce1－xNdxO2－δ固溶体的电子顺磁共振谱和阻抗谱的研究 | |
| 引用本文： | 林晓敏,李莉萍,苏文辉.Ce1－xNdxO2－δ固溶体的电子顺磁共振谱和阻抗谱的研究[J].化学学报,2007,65(10):989-993. |
| 作者姓名： | 林晓敏 李莉萍 苏文辉 |
| 作者单位： | 1. 北华大学理学院物理系,吉林,132013;吉林大学物理学院,长春,130023 2. 吉林大学物理学院,长春,130023 3. 哈尔滨工业大学理学院,哈尔滨,150001;中国科学院国际材料物理中心,沈阳,110015 |
| 基金项目： | 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. |
| 摘 要： | 利用溶胶-凝胶方法在800 ℃焙烧10 h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－d 具有离子导电特性, 600和700 ℃时的电导率分别为4.25×10－3和1.12×10－2 S?cm－1, 活化能为0.68 eV. |
| 关 键 词： | 溶胶-凝胶方法 固溶体Ce1－xNdxO2－δ EPR谱 电导率 |
| 收稿时间： | 2006-8-25 |
| 修稿时间： | 2006-08-252006-11-10 |
Study of Electron Paramagnetic Resonance Spectra and Impedance Spectra for the Solid Solutions Ce1-xNdxO2-δ |
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| LIN Xiao-Min,LI Li-Ping,SU Wen-Hui.Study of Electron Paramagnetic Resonance Spectra and Impedance Spectra for the Solid Solutions Ce1-xNdxO2-δ[J].Acta Chimica Sinica,2007,65(10):989-993. | |
| Authors: | LIN Xiao-Min LI Li-Ping SU Wen-Hui |
| Institution: | 1.Department of Physics, Beihua University, Jilin 132013;2. Department of Physics, Jilin University, Changchun 130023;3. Department of Physics, Harbin Institute of Technology, Harbin 150001;4. Center of International Material Physics Reserch, Chinese Academy of Sciences, Shengyang 110015 |
| Abstract: | 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 Ce1－xNdxO2－δ were crystallized in a cubic fluorite structure. The electron paramagnetic resonance spectra suggested that the content of Ce3＋ ions is decreased with the increasing dopant content x in the solid solutions Ce1－xNdxO2－δ, which suggested that doping with lower valence Nd3＋ ions may control the redox of Ce4＋ ions in the solid solutions. The impedance spectra of the solid solutions showed ionic conduction. The conductivities of Ce0.9Nd0.1O2－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. |
| Keywords: | sol-gel method solid solution Ce1－xNdxO2－δ EPR spectrum conductivity |
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