| 纳米晶La0.7Pb0.3FeO3的制备及其对CO敏感特性的研究 |
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| 引用本文： | 宋鹏,秦宏伟,张玲,蒋民华,胡季帆.纳米晶La0.7Pb0.3FeO3的制备及其对CO敏感特性的研究[J].稀有金属材料与工程,2005,34(9):1403-1406. |
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| 作者姓名： | 宋鹏 秦宏伟 张玲 蒋民华 胡季帆 |
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| 作者单位： | 山东大学,山东,济南,250100 |
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| 基金项目： | 国家自然科学基金资助项目（59772040） |
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| 摘 要： | 利用溶胶-凝胶法制备了纳米晶La0.7Pb0.3FeO3气敏材料,并对其相组成、电导及其对CO气敏性能进行了研究.XRD结果表明：掺铅固溶体La0.7Pb0.3FeO3仍为正交晶系钙钛矿结构,粒径约为17nm,低于纯相LaFeO3的粒径31nm。电导测鼍显示：该材料足P型半导体导电行为，电导大于同温度下纯相LaFeO3的电导，且电导突变温度有所降低。气敏性能研究表明：Pb掺杂对其CO气敏性能有了明显改善。
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| 关 键 词： | 纳米晶 钙钛矿 CO气敏性能 La0.7Pb0.3FeO3 |
| 文章编号： | 1002-185X(2005)09-1403-04 |
| 收稿时间： | 2004-03-30 |
| 修稿时间： | 2004-10-30 |
Preparation and CO Sensitivity of Nanocrystalline La0.7Pb0.3FeO3-Based Gas Sensor |
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| Song Peng;Qin HongWei;Zhang Ling;Jiang MinHua;Hu JiFan.Preparation and CO Sensitivity of Nanocrystalline La0.7Pb0.3FeO3-Based Gas Sensor[J].Rare Metal Materials and Engineering,2005,34(9):1403-1406. |
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| Authors: | Song Peng;Qin HongWei;Zhang Ling;Jiang MinHua;Hu JiFan |
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| Abstract: | This paper reports that nano- La0.7Pb0.3FeO3 powders can be used as a new type of gas-sensing material for detecting CO. The La0.7Pb0.3FeO3 powders were prepared by a citric method. The powders are characterized by X-ray diffraction, showing that the La0.7Pb0.3FeO3 is still perovskite phase with orthorhombic structure and its crystallite size is about 17 nm, smaller than that of LaFeO3. The La0.7Pb0.3FeO3 is a kind of p-type semiconductive material, and its conductivity is higher than that of LaFeO3. The CO sensitivity of La0.7Pb0.3FeO3-based sensor is investigated. We found that La3+ partly substituted by Pb2+ in LaFeO3 can enhance its sensitivity for CO gas. |
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| Keywords: | nanocrystalline perovskite CO sensitivity La0 7Pb0 3FeO3 |
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