Abstract: New temperature - dependencies are proposed for both the pseudocritical compressibility factor ξc and the temperature correction factor of the attractive parameter α inthe original CSPT equation. This modification yields accurate calculations of saturated properties at a low reduced temperature and of thermodynamic properties near the critical region. Excellent results are alse obtained in predicting thermodynamic properties of supercritical fluids.

摘要： 对硬球三参数状态方程(CSPT)引力参数的温度校正系数α和拟临界压缩因子(?)提出了新的温度关系式.用修正的CSPT方程(MCSPT)计算了105种纯物质的饱和性质.结果表明,新的方程改善了原CSPT方程在低对比温度下物质的饱和性质,以及临界区域内热力学性质的计算精度.并用于计算超临界状态下物质的热力学性质,有良好的外推性.