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本文采用渗氧池的方法研究了氧化钙-氧化锆陶瓷在960—1450℃的温度范围内的渗氧性,渗氧池一侧的氧分压(P′o_2)为10~(-3)～1大气压,另一侧的氧分压(P″o_2)为10~(-0)～10~(-4)大气压,单位时间单位面积渗氧量与(P′o_2~(1/n)-P″o_2~(1/n))成正比,其中指数项中的n值依赖于样品的微观结构和厚度,所导出的由内部扩散及表面反应混合控制的机理与实验结果一致,从而满意地解释了渗氧性对氧压依赖关系的特异规律,内部扩散及表面反应的活化能相近,约为200kJ/mol。
In this paper, the oxygen permeability of calcium oxide-zirconia ceramics in the temperature range of 960-1450 ℃ was studied by the method of percolation pond. The oxygen partial pressure (P’o_2) ~ 1 atm and oxygen partial pressure (P “o_2) on the other side is 10 ~ (-0) ~ 10 ~ (-4) -P ”o_2 ~ (1 / n)), where the value of n in the exponential term is dependent on the microstructure and thickness of the sample, and the mechanism derived from mixing of internal diffusion and surface reaction is consistent with the experimental results The specific law of oxygen dependency on oxygen pressure was explained. The activation energy of internal diffusion and surface reaction was similar, about 200 kJ / mol.