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报道SrFe1.125Co0.375Oy致密陶瓷膜在高氧梯度下的氧渗透行为。将膜的一端置于空气中,另一端引入CO,通过CO的氧化反应降低氧分压,增大膜两端的氧分压梯度。研究发现:900℃时氧渗透率高达16.0×10-7mol/cm2s。在850℃以上,氧渗透率与温度的依赖关系不显著,而氧渗透量与CO分压成线形关系,并且与膜的厚度变化基本无关。这表明在该膜材料的氧渗透过程是受表面反应控制的。
The oxygen permeation behavior of SrFe1.125Co0.375Oy dense ceramic membranes under high oxygen gradient was reported. One end of the membrane is placed in air and the other end is introduced with CO. The oxygen partial pressure is reduced by the oxidation reaction of CO, increasing the oxygen partial pressure gradient across the membrane. The results show that the oxygen permeability reaches as high as 16.0 × 10-7mol / cm2s at 900 ℃. At temperatures above 850 ° C, the dependence of oxygen permeability on temperature is not significant, whereas oxygen permeation is linearly related to CO partial pressure and has little to do with the change in film thickness. This indicates that the oxygen permeation process in the membrane material is controlled by surface reactions.