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The diffusion reaction theory for feature time regular

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

  1. 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

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

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