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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

钒酸锶(Sr2V2O7)氧敏电阻特性的研究

陈永生; 张祖仁; 刘振祥   

  1. 中国科学院物理所; 北京100080

  • 收稿日期:1997-11-10 修回日期:1997-12-05 出版日期:1998-12-20 网络出版日期:1998-12-20

Oxygen Sensitive Resistance Properties of Sr2V2O7

CHEN Yong-Sheng; ZHANG Zu-Ren; LIU Zhen-Xiang   

  1. Institute of Phisics; Chinese Academy of Sciences Beijing 100080 China
  • Received:1997-11-10 Revised:1997-12-05 Published:1998-12-20 Online:1998-12-20

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摘要： 通过钒酸锶电阻特性的研究，评估其作为电阻型氧敏传感器的可能性．实验中测量了不同温度下钒酸锶陶瓷片的体电阻和不同温度、不同氧压下的表面电阻，对实验数据进行数学处理后，得到钒酸锶材料的一些性质：相变对其电阻特性的影响很小；体电阻和面电阻的激活能分别为1．31eV和191eV；表面电阻的氧敏因子m＝6；温度系数相对较大．所以钒酸锶要作为尾气传感器材料，需考虑进行表面改性．

关键词: 钒酸锶, 氧敏, 电阻特性, 陶瓷

Abstract: The possibility of Sr2V2O7 to be a resistive oxygen-sensitive material was evaluated by studying its electrical properties, bulk and surface resistances of
ceramic Sr2V2O7 at different temperatures and/or oxygen partial pressures were measured experimentally. After mathematical process of the data, some properties of
Sr2V2O7 were achieved. Phase transformation has little influence on the electrical properties; the activation energies for surface and bulk conductances
are 1.91eV and 1.31eV respectively; It has an oxygen sensitive factor m=6 and a relative high temperature coefficient. Sr2V2O7 needs surface
modification if it serves as a potential exhaust gas sensor material.

Key words: stronium vanadium oxide, oxygen sensitivity, electrical properties, ceramics

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