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| Sm_(0.9)Sr_(0.1)FeO_3的制备及其气敏性能 | |
| 引用本文： | 陈林富,胡季帆,韩周祥,秦宏伟.Sm_(0.9)Sr_(0.1)FeO_3的制备及其气敏性能[J].电子元件与材料,2009,28(7). |
| 作者姓名： | 陈林富 胡季帆 韩周祥 秦宏伟 |
| 作者单位： | 1. 郑州轻工业学院,河南省表界面重点实验室,河南,郑州,450002 2. 郑州轻工业学院,河南省表界面重点实验室,河南,郑州,450002;山东大学,物理学院,山东,济南,250100 3. 山东大学,物理学院,山东,济南,250100 |
| 基金项目： | 国家自然科学基金资助项目 |
| 摘 要： | 用Sr对SmFeO3进行A位掺杂,用柠檬酸盐sol-gel法制得Sm0.9Sr0.1FeO3粉体。对其进行XRD表征,并制成气敏元件。采用静态配气法测试其气敏性能。结果表明:该粉体为斜方晶系钙钛矿结构,平均晶粒尺寸约为25nm。在空气中的电导较SmFeO3高50倍左右,最佳工作温度下降160℃。在220℃的最佳工作温度下,气敏元件对体积分数为5×10–4乙醇的灵敏度高达56,且其选择性好,响应–恢复时间分别为40s和50s,有望开发成为对乙醇检测的气敏材料。 |
| 关 键 词： | 钙钛矿结构 纳米材料 气敏性能 sol-gel 乙醇 |
Preparation and its gas sensing properties of Sm_(0.9)Sr_(0.1)FeO_3 |
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| CHEN Linfu,HU Jifan,HAN Zhouxiang,QIN Hongwei.Preparation and its gas sensing properties of Sm_(0.9)Sr_(0.1)FeO_3[J].Electronic Components & Materials,2009,28(7). | |
| Authors: | CHEN Linfu HU Jifan HAN Zhouxiang QIN Hongwei |
| Affiliation: | 1. Henan Provincial Key Laboratory of Surface & Interface Science;Zhengzhou University of Light Industry;Zhengzhou 450002;China;2. School of Physics;Shandong University;Jinan 250100;China |
| Abstract: | Sm0.9Sr0.1FeO3 powder was prepared by a citrate sol-gel method. Obtained powder was characterized by means of XRD, and was used to prepare gas sensor. And its gas sensitive properties were tested using gas distribution in static state. The results show that Sm0.9Sr0.1FeO3 powder has an orthorhombic perovskite structure and the average grain size is about 25 nm. The conductance of Sm0.9Sr0.1FeO3 is about 50 times as high as that of SmFeO3 in air and the optimal operating temperature is decreased by 160 ℃. To 5×10–4 ethanol (volume fraction), the sensitivity of this sensor is 56 at the best operating temperature (220 ℃). Its selectivity is good, moreover, response-recovery time is 40 s and 50 s, respectively. It can be expected to be a potential gas sensing material to ethanol. |
| Keywords: | sol-gel |
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