Relationship of Surface Tension, Oxygen Partial Pressure, and Temperature for Molten Iron
Relationship of Surface Tension, Oxygen Partial Pressure, and Temperature for Molten Iron
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铁水表面张力、氧分压和温度的关系
DOI：
10.1143/jjap.50.11rd05
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
H. Fukuyama
中科院分区：
文献类型：
--
作者：
S. Ozawa;Suguru Takahashi;Shoji Suzuki;H. Sugawara;H. Fukuyama
铁水的表面张力是在 Ar-He-5 vol% H2 的还原性气体气氛下通过电磁悬浮振荡液滴法测量的。由于氧分压的温度依赖性与氧吸附平衡常数的温度依赖性之间的竞争，表面张力的温度依赖性并不表现出线性关系，而是在 1810 K 左右显示出特殊的扭结。我们成功地推导出铁水的表面张力作为氧分压和温度的函数。此外，还估算了铁水氧吸附反应的标准焓和熵。
Surface tension of molten iron was measured under reducing gas atmosphere of Ar–He–5 vol % H2 by an oscillating droplet method using electromagnetic levitation. The temperature dependence of surface tension did not exhibit a linear relationship but revealed a peculiar kink at around 1810 K, due to competition between the temperature dependence of oxygen partial pressure and that of the oxygen adsorption equilibrium constant. We successfully derived the surface tension of molten iron as functions of both oxygen partial pressure and temperature. Furthermore, the standard enthalpy and entropy for oxygen adsorption reaction on molten iron were also estimated.