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．
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.
参考文献
| [1] | Liu Zhenxiang, Lin Zhangda, Fan Hanjie, et al. Appl. Phys. 1988, A 45: 159--164 2 Suzuki N, Noritake T, Yamamoto N, et al. Mat. Res. Bull., 1991, 26, 1--9 3 TANAKA Shigenori, et al. Physica C 1991, 185--189: 709--710 4 Huang Jinfan, Sleight W. Arthur, Mat. Res. Bull., 1992, 27: 581--590 5 Sbervglieri G. Seners and Actuators, 1995, B 23: 103--109 |
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