|
|||||
|
|
| SnO2气敏元件的老化性能分析 | |
| 引用本文： | 陈环,傅刚,吕平,刘志宇. SnO2气敏元件的老化性能分析[J]. 功能材料与器件学报, 2009, 15(3) |
| 作者姓名： | 陈环 傅刚 吕平 刘志宇 |
| 作者单位： | 广州大学物理与电子工程学院,广州,510006;中山大学物理科学与工程技术学院,广州,510275 |
| 基金项目： | 广州市科技计划项目，广州市属高校科技计划项目 |
| 摘 要： | 制备了SnO2棒状和球状晶粒粉体的气敏元件并进行稳定性测试,初步分析了元件的老化过程和机制.棒状和球状晶粒粉体以等重量比混合的气敏材料在850℃下高温烧结能提高气敏元件的长期稳定性.采用对材料微结构敏感的复阻抗谱方法测量了试样电性能的变化,通过吸收电流曲线分析了试样的与荷电状态有关的离子电导成分.结果表明,试样在通电老化之初电阻电容值有较大波动,通电数天后趋于稳定,老化表现为晶界电阻和晶界电容的变化,说明老化过程伴随着气敏材料的晶界势垒高度和晶界耗尽层宽度的改变,其原因可能是直流偏压作用下晶界层中的离子迁移. |
| 关 键 词： | SnO2 气敏 老化 复阻抗谱 吸收电流 |
Aging characteristics of SnO_2 gas sensors |
|
| CHEN Huan,FU Gang,LV Ping,LIU Zhi-yu. Aging characteristics of SnO_2 gas sensors[J]. Journal of Functional Materials and Devices, 2009, 15(3) | |
| Authors: | CHEN Huan FU Gang LV Ping LIU Zhi-yu |
| Affiliation: | 1.School of Physics and electronics Technology;Guangzhou University;Guangzhou 510006;China;2.School of Physics & Engineering;Sun Yat-sen University;Guangzhou 510275;China |
| Abstract: | Gas sensors composed of Tin Oxide(SnO_2) nanoparticles of various aspect ratios were synthesized and their aging properties were studied by absorbing current and Complex Impedance Spectrum(CIS) methods.The results indicated that devices of optimal long-term stability could be obtained by sintering the equiponderant mixture of SnO_2 nanorods and spherical nanoparticles at 850C.Using CIS method the electrical properties that are related to the microscopic structure of the samples were recorded,while the evolu... |
| Keywords: | SnO2 |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |