CAJ | 학술논문

对气压变化对极限电流型氧传感器扩散机理的影响进行了研究.实验中将扩散孔径为30 μm的极限电流型氧传感器先后放置在不同气压环境中进行了电学性能测试.实验结果显示:在常压下该氧传感器的极限电流,Ⅰ_L与氧浓度的对数表达式ln(1-Xo_1)具有很好的线性关系,呈现正常扩散模型的特征.但在低气压环境下,该传感器的极限电流,Ⅰ_L受气压P的影响,并呈现Knudsen模型的某些特征.
대기압변화대겁한전류형양전감기확산궤리적영향진행료연구.실험중장확산공경위30 μm적겁한전류형양전감기선후방치재불동기압배경중진행료전학성능측시.실험결과현시:재상압하해양전감기적겁한전류,Ⅰ_L여양농도적대수표체식ln(1-Xo_1)구유흔호적선성관계,정현정상확산모형적특정.단재저기압배경하,해전감기적겁한전류,Ⅰ_L수기압P적영향,병정현Knudsen모형적모사특정.
In this article the gas diffusion mechanisms of the limiting current oxygen sensors was studied. For a limiting current oxygen sensor in which the pore diameter d is about 30μm, the diffusion of the limiting current Ⅰ_L was quite linear with ln(1 -Xo_2) rather than Xo_2 at 1 atm gas pressure, it showed the normal mechanism was more dominant than the Knudsen one. However at the low gas pressure , the limiting current Ⅰ_L was changed with the variation of total gas pressure P. This reveals the gas diffusion mechanisms belong to some Characteristics of the Knudsen diffusion .