中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (2): 31-34.

• 研究论文 • 上一篇    下一篇

ZnSnO3陶瓷材料气敏特性与导电机理

张天舒, 沈瑜生, 晋传贵   

  1. 中国科学技术大学材料科学与工程系 合肥 230026
  • 收稿日期:1993-04-20 修回日期:1993-09-07 出版日期:1994-04-10 发布日期:1994-04-10
  • 基金资助:
    国家自然科学基金资助项目

Gas Sensing Propery and Electric Conduction of ZnSnO3

Zhang Tianshu, Shen Yusheng, Jing Chuangui   

  1. Department of Materials Science and Engineering, University of Scicnce and Technology of China, Hefei 230026
  • Received:1993-04-20 Revised:1993-09-07 Published:1994-04-10 Online:1994-04-10

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摘要： X-射线光电子光谱(XPS)分析表明,在25～300℃时,ZnSnO3的表面存在O2-及O-两种吸附氧,且随工作温度的增加,O2-逐渐转变成O-或O2-。ZnSnO3周表面电阻控制型气敏材料,氧的吸附活化能为0.52eV。 ZnSnO3基元件对各种还原性气体都有一定气敏效应,它对乙醇比汽油的分辨率高5倍以上。

关键词: ZnSnO3, 气敏传感器, 性能

Abstract: The adsorption of oxygen on ZnSnO3 has been studied by X-ray photoelectron spectroscopy.At temperatures ranging from 25 ℃ to 300 ℃ the charge states of the chemisorbed oxygen were found to be O2- and O-, and the former may convert into O-(or O2-) with increasing temperature. ZnSnO3 is a typical surface-controlled sensor.The activation energy of oxygen adsorbed on ZnSnO3 was 0.52eV. The ZnSnO3-based sensor showed the greatest sensitivity to C2H5OH gas than to other reducing gases:petrol, C2H2,LPG,and H2.

Key words: zinc stannate, gas sensor, property

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