| Αl掺杂对氧离子导体La2Mo2O9的氧离子扩散和导电性能影响 |
| |
| 引用本文： | 李相虎,李丹. Αl掺杂对氧离子导体La2Mo2O9的氧离子扩散和导电性能影响[J]. 四川大学学报(自然科学版), 2010, 47(3): 606-610. DOI: 10.3969/j.issn.0490-6756.2010.03.036 |
| |
| 作者姓名： | 李相虎 李丹 |
| |
| 作者单位： | 武汉工业学院数理系,武汉,430023 |
| |
| 基金项目： | 湖北省教育厅科学研究计划项目，武汉工业学院科研启动基金 |
| |
| 摘 要： | 主要研究了Al掺杂效应对氧离子导体La2Mo2-yAlyO9-δ(y = 0.1, 0.2, 0.3)的影响,从XRD、DSC和介电测量中发现,Al3+在La2Mo2O9中的固溶度只有10 mol%, 且不能抑制纯La2Mo2O9的α/β相转变;在La2Mo2-yAlyO9-δ(y = 0, 0.1, 0.2)的介电损耗-频率谱中发现一Pd峰,其机制对应着氧离子的短程扩散,Al掺杂后La2Mo2O9样品的激活能比纯La2Mo2O9的要低,同时对应的电导率比纯La2Mo2O9高.
|
| 关 键 词： | 介电弛豫 激活能 电导率 |
| 收稿时间： | 2009-06-06 |
Influence of aluminum doping on the oxygen-ion diffusion and ionic conduction in the La2Mo2O9 oxide-ion conductors |
| |
| LI Xiang-Hu,LI Dan. Influence of aluminum doping on the oxygen-ion diffusion and ionic conduction in the La2Mo2O9 oxide-ion conductors[J]. Journal of Sichuan University (Natural Science Edition), 2010, 47(3): 606-610. DOI: 10.3969/j.issn.0490-6756.2010.03.036 |
| |
| Authors: | LI Xiang-Hu LI Dan |
| |
| Affiliation: | Department of Mathematicas and Physics, Wuhan Polytechnic University;Department of Mathematicas and Physics, Wuhan Polytechnic University |
| |
| Abstract: | The effects of aluminum doping in La2Mo2-yAlyO9(y = 0.1, 0.2, 0.3) samples were studied using XRD, DSC and dielectric relaxation measurements. The results indicate that the solubility of Al3+ in La2Mo2O9 sample is 10mol%, Al3+ can not suppress the α/β phase transition in the La2Mo2O9, and a Pd peak is detected in the dielectric loss with frequency measurements, which can be ascribed to the relaxation process associated with the short-range diffusion of oxygen ions via vacancies, the activation energy of the Pd peak in La2Mo2-yAlyO9-δ(y = 0.1, 0.2) samples is lower than that in pure La2Mo2O9, correspondingly, the conductivities of La2Mo2-yAlyO9-δ(y = 0.1, 0.2) samples are higher than that of pure La2Mo2O9 in the whole measurement temperature. |
| |
| Keywords: | La2Mo2O9 La2Mo2O9 dielectric relaxation activation energy conductivity |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《四川大学学报(自然科学版)》浏览原始摘要信息 |
|
点击此处可从《四川大学学报(自然科学版)》下载全文 |
|
