| 高纯铌的脱氧热力学特性 |
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| 引用本文： | 刘胜峰,林建华,苏勉曾.高纯铌的脱氧热力学特性[J].物理化学学报,1999,15(3):228-233. |
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| 作者姓名： | 刘胜峰 林建华 苏勉曾 |
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| 作者单位： | State Key Laboratory of Rare Earth Materials Chemistry and Application,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871 |
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| 摘 要： | 在 973- 1 473K温度范围内 ,测定了铌与Ca CaO和与Mg MgO共存时铌金属中氧的平衡浓度 .得出并讨论了铌中的氧溶解反应的Gibbs自由能表达式和氧分压 温度 成分 (p t x)关系表达式 .
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| 关 键 词： | 铌的除氧 热力学 Gibbs自由能 高纯铌 |
| 收稿时间： | 1998-05-20 |
| 修稿时间： | 1998-09-10 |
Thermodynamics of Deoxidation of High Purity Niobium |
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| Liu Shengfeng,Lin Jianhua,Su Mianzeng.Thermodynamics of Deoxidation of High Purity Niobium[J].Acta Physico-Chimica Sinica,1999,15(3):228-233. |
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| Authors: | Liu Shengfeng Lin Jianhua Su Mianzeng |
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| Institution: | State Key Laboratory of Rare Earth Materials Chemistry and Application,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871 |
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| Abstract: | Starting niobium samples with different oxygen contents were produced by arc melting and electron beam melting respectively.The equilibrium oxygen contents of the niobium metal have been measured in the temperature range of 1173-1473K for Ca CaO Nb and of 973 and1173K for Mg MgO Nb by an inert gas fusion infrared absorption method.The equilibrium oxygen contents in Nb increases with temperature,which is independent of oxygen concentration of the starting Nb samples.Based on the equilibrium oxygen contents,the Gibbs free energy of the oxygen dissolution in niobium metal,as well as the expressions of oxygen pressure temperature component ( p t x ) for theses two equilibrium systems were obtained.The acquired free energy values a less than that reported in the literature.This difference is mainly attributed to the adoption of different standard formation free energy of CaO. |
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| Keywords: | Deoxidation of niobium Thermodynamics Gibbs free energy High purity niobium |
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