<報文>気相中の低酸素分圧の制御および起電力測定

概要

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Low oxygen partial pressures in gas mixtures controlling with the H_2O-H_2 ratios have been measured by a ZrO_2 (+CaO) solid electrolyte cell. The measured P_<H_2O>/P_<H_2> ratios obtained by the sulfuric acid solution were found to be greater than the theoretical values by log P_<H_2O>/P_<H_2>=0.5 in the range of P_<H_2O>/P_<H_2><10^<-3>. Flow rate dependence of emf values becomes significant with the increase of the difference in oxygen partial pressures between reference and working electrodes. The flow rate greater than 1000ml/min was required for the measurement of oxygen partial pressures of P_<H_2O>/P_<H_2><10^<-3> at 800℃. The measured P_<H_2O>/P_<H_2> ratios was found to deviate at temperatures above 1200℃. These results have been discussed based on the electrochemical oxygen permeability across the solid electrolyte.ZrO_2 solid electrolyteoxygen concentration cellcontrolled atmosphereoxygen permeabilityoxygen partial pressuregas-slag equilibriummetallic getter
東北大学の論文
1991-12-27