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Nd1-xZnxFeO3纳米材料的甲烷气体气敏性研究

黄善兴，秦宏伟，刘 杏，张 瑞，胡季帆，蒋民华   

  1. 山东大学物理与微电子学院， 山东济南250100
  • 收稿日期:2006-12-14 修回日期:1900-01-01 出版日期:2006-10-24 发布日期:2006-10-24
  • 通讯作者: 黄善兴

The CH4 gas sensing properties of Nd1-xZnxFeO3 nano-materials

HUANG Shan-xing, QIN Hong-wei, LIU Xing, ZHANG Rui, HU Ji-fan and JIANG Min-hua   

  1. School of Physics and Microelectronics, Shandong Univ., Jinan 250100, Shandong, China
  • Received:2006-12-14 Revised:1900-01-01 Online:2006-10-24 Published:2006-10-24
  • Contact: HUANG Shan-xing

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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.

关键词: 溶胶凝胶法, 钙钛矿结构, 气敏特性 , 纳米材料

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.

Key words: gas sensing , nano-materials, perovskite structure, sol-gel method

中图分类号: 

  • TG146.4
[1] 杨军. 金属基纳米材料表征和纳米结构调控[J]. 山东大学学报（理学版）, 2013, 48(1): 1-22.
[2] 丁轶1,2. 纳米多孔金属:一种新型能源纳米材料[J]. J4, 2011, 46(10): 121-133.
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