铁液中Al2O3纳米颗粒溶解和熔化的热力学研究
来源期刊：有色金属科学与工程2011年第1期
论文作者：王国承 侯春菊 张立恒 刘伟
文章页码：23 - 27
关键词：铁液：纳米Al2O3溶解；熔化
Key words：liquid iron; Al2O3 nano-particle; dissolve; melt
摘 要：与块体材料相比，纳米材料尺寸小、界面能大，导致其溶解和熔化过程的热力学不同于块体材料，从理论上推导了Al203纳米颗粒在铁液中的元素平衡溶度积以及熔化温度与颗粒尺寸之间的关系，结果表明，随颗粒尺寸减小，平衡溶度积逐渐增加，熔化温度逐渐下降，而且粒径越小，平衡溶度积和熔化温度的变化率越大．经计算，1873K铁液中Al203的质量分数为0.01%时，半径为0.1nm的Al203颗粒比块体Al203的平衡溶度积增加了11.71%；半径为1nm的Al203颗粒在空气和铁液中的熔化温度分别为1849K和1267K，比块体Al203的熔化温度分别下降了454K和1036K.
Abstract: The thermodynamics such as dissolve and melt process of nano-material is different from bulk material because of fine size and high interfacial energy of nano-material. The relations between element equilibrium solution product, melting point and size of nano-particle have been deduced. Results show that element equilibrium solution product increase and melting point drop down gradually with the decrease of nano-particle size. The change of equilibrium solution and melting point increases with the variation of nano-particle size. Calculations show that increment percent of element equilibrium solution product is 11.71% of radius 0.1nm Al203 than bulk Al203 that 0.01% mass in liquid iron. The melting points of radius Inm Al203 are respectively 1849K and 1267K in the atmosphere and liquid iron. The decrement of melt points are respectively 454K and 1036K.
