特征时间规律的扩散反应理论

山东大学学报(工学版)

特征时间规律的扩散反应理论

李蕾，袁庆华，刘文利，李建明，裘南畹

山东大学物理与微电子学院，山东济南250061

收稿日期:2004-10-15 修回日期:1900-01-01 出版日期:2006-08-24 发布日期:2006-08-24
通讯作者: 李蕾

The diffusion reaction theory for feature time regular

LI Lei，YUAN Qinghua，LIU Wenli，LI Jianming，QIU Nanwan

School of Physics and Microelectronics，Shandong University，Jinan 250061，China

Received:2004-10-15 Revised:1900-01-01 Online:2006-08-24 Published:2006-08-24
Contact: LI Lei

摘要/Abstract

摘要： 提出了多孔气敏薄膜电导响应扩散反应模型；通过求解和无量纲分析扩散反应方程给出了τs和τc的规律，τc=τs/r=(2/π)2kCr-10l2/D；通过理论与实验相结合的方法研究表面吸附指数γ和吸附能Ea. 实验结果表明：C2H5OH在ZnO薄膜材料上的吸附特性有下面的特点：①有两个不同温区，高于380?℃和低于380?℃的物理吸附能不同；②物理吸附能较大. 关键词：扩散反应；无量纲分析；吸附指数

关键词: 扩散反应, 无量纲分析, 吸附指数

Abstract: The diffusion reaction model of conductance for porous gas senning thin film is proposed; from solving and nondimentionally analyzing the reaction diffusion equation, the rule of τs and τc, τc=τs/r=(2/π)2kCr-10l2/D, is put for ward; using combination of theoretical and experimental methods, the surface adsorption exponent and adsorbing energy Ea are investigated.The experimental results indicated that there are two adsorptive characteristics of C2H5OH in the ZnO film. ① There are two different temperature ranges:　the energy of physical adsorption is not same with upper 380?℃ and lower 380?℃. ② It has bigger physical adsorption energy.

Key words: nondimontional analysis, adsorption exponont , diffussion reaction

李蕾,袁庆华,刘文利,李建明,裘南畹 . 特征时间规律的扩散反应理论[J]. 山东大学学报(工学版), 2006, 36(4): 84-87 .

LI Lei,YUAN Qinghua,LIU Wenli,LI Jianming,QIU Nanwan . The diffusion reaction theory for feature time regular[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2006, 36(4): 84-87 .

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