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对P₂O₅-Na₂O和P₂O₅-MgO系统的热力学评估

Lideng Ye¹, Chenbo Li¹, Jifeng Yang¹

¹School of Material Science and Engineering, Central South University, Changsha 410083, China.

Materials (Basel, Switzerland)

|May 25, 2024

概括

准确的P2O5-Na2O和P2O5-MgO系统的热力学数据对于钢铁制造业的脱是至关重要的. 这项研究使用CALPHAD方法来建模这些系统,为工业应用提供可靠的热力学参数.

科学领域:

材料科学材料科学材料科学
金工程金工程金工程
物理化学物理化学

背景情况:

控制钢中的含量对于材料质量至关重要.
了解氧化物系统中的热力学平衡是钢铁制造过程中有效去化的关键.

研究的目的:

对P2O5-Na2O和P2O5-MgO系统的相位平衡和热力学数据进行批判性评估和重新评估.
使用CALPHAD方法为这些系统开发精确的热力学模型.
提供可靠的数据,用于构建钢铁制造的多元氧化物热力学数据库.

主要方法:

在热力学建模中使用了CALPHAD (Calculation of PHAse Diagram) 方法.
采用离子双子板模型来描述液相,并结合了特定的酸盐化物种.
通过将计算的相位图和热力学特性与实验数据进行比较来验证模型.

主要成果:

为P2O5-Na2O和P2O5-MgO系统开发了一套新的,自相一致的热力学参数.
在计算和实验数据之间取得了很好的一致性,相组合差异低于0.9 mol.%.
在这种情况下,首次成功地使用离子两个子板模型模型模拟了液态相.

结论:

开发的热力学模型准确地表示了P2O5-Na2O和P2O5-MgO系统.
这些发现对开发用于钢铁制造工艺的全面热力学数据库做出了重大贡献.
这项研究提高了钢铁生产过程中含量的控制.

关键词:

卡尔法达 (CALPHAD) 是一个这是一个P2O5-MgO系统.这是一个P2O5-Na2O系统.一个相位图的相位图.热力学优化热力学优化

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