| Nd1-xZnxFeO3纳米材料的甲烷气体气敏性研究 |
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| 引用本文： | 黄善兴,秦宏伟,刘杏,张瑞,胡季帆,蒋民华.Nd1-xZnxFeO3纳米材料的甲烷气体气敏性研究[J].山东大学学报(理学版),2007,42(3):36-39. |
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| 作者姓名： | 黄善兴 秦宏伟 刘杏 张瑞 胡季帆 蒋民华 |
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| 作者单位： | 山东大学,物理与微电子学院,山东,济南,250100 |
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| 摘 要： | 采用Sol-gel法制备出Nd1-xZnxFeO3（x=0, 0.04, 0.08, 0.2）粉体. XRD图谱表明Nd1-xZnxFeO3粉体为正交钙钛矿结构，产物为纳米级颗粒(16～17.5nm)，平均粒径随x的增大有所减小. 用Nd1-xZnxFeO3纳米粉体制成气敏元件，测试了材料对甲烷气体的气敏特性. 测试结果表明Zn的适量掺入可提高对甲烷的灵敏度. 其中以Nd0.92Zn0.08FeO3对甲烷的灵敏度最大，在最佳工作温度200℃下对4×10-6mol/L的甲烷气体灵敏度最大值为3.87，对2×10-5mol/L的甲烷气体中灵敏度最大值为16. Nd0.92Zn0.08FeO3还表现出了极好的响应恢复时间特性，工作温度200℃时对2×10-5mol/L的甲烷响应、恢复时间分别为25s和45s.
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| 关 键 词： | 溶胶凝胶法 钙钛矿结构 纳米材料 气敏特性 |
| 文章编号： | 1671-9352（2007）03-0036-04 |
| 收稿时间： | 2006-12-14 |
| 修稿时间： | 2006-12-14 |
The CH4 gas sensing properties of Nd1-xZnxFeO3 nano-materials |
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| HUANG Shan-xing,QIN Hong-wei,LIU Xing,ZHANG Rui,HU Ji-fan,JIANG Min-hua.The CH4 gas sensing properties of Nd1-xZnxFeO3 nano-materials[J].Journal of Shandong University,2007,42(3):36-39. |
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| Authors: | HUANG Shan-xing QIN Hong-wei LIU Xing ZHANG Rui HU Ji-fan JIANG Min-hua |
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| Institution: | School of Physics and Microelectronics, Shandong Univ., Jinan 250100, Shandong, China |
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| Abstract: | Nd1-xZnxFeO3（x=0, 0.04, 0.08, 0.2）powders with an orthogonal perovskite structure were prepared using the sol-gel method. The average grain sizes of powders are 16～17.5nm. The addition of Zn can decrease the grain size. The CH4 gas-sensing properties of Nd1-xZnxFeO3 nano-powders were studied. Among all the investigated materials, Nd0.92Zn0.08FeO3 show maximum sensitivity to CH4 gas. The sensitivity S of Nd0.92Zn0.08FeO3 at optimal working temperature 200℃ is 3.87, and 16 for 4×10-6mol/L and 2×10-5mol/L CH4 respectively. The response and recovering time under 2×10-5mol/L CH4 for Nd0.92Zn0.08FeO3 at 200℃ are 25s and 45s respectively. |
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| Keywords: | sol-gel method perovskite structure nano-materials gas sensing |
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