A simple approach to estimate the melting temperature of alkali halides

IF 1.1 4区工程技术 Q4 Engineering

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI:10.32908/hthp.v51.1213

M. Goyal

引用次数: 0

Abstract

In the present study, a thermodynamical formulation is developed to determine the melting temperature of alkali halides with increasing pressure. The model is used to estimate the melting temperature of alkali halides at different pressures qualitatively. The formulation is obtained using the Goyal and Gupta thermodynamic equation of state. The model calculations require the computed values of volume compression, bulk modulus and its first pressure derivative at varying pressures. It is noted from model calculations that melting temperature increases with pressure but not in linear manner. The present computed results for pressure dependent melting temperature are compared with the available simulated results. The approach is found to be valid as good agreement is observed between previous and present results. Graphs are plotted to depict the variation of melting temperature with isothermal pressure, thermal pressure and total pressure acting on the solid. The present study helps to understand the impact of pressure on melting temperature of alkali halides qualitatively. The model used can also extrapolate the results upto higher pressures.

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估算碱卤化物熔化温度的一种简单方法

在本研究中，开发了一个热力学公式来确定碱卤化物随压力增加的熔化温度。利用该模型对碱卤化物在不同压力下的熔融温度进行了定性估计。利用Goyal和Gupta热力学状态方程得到了该公式。模型计算需要计算出不同压力下的体积压缩、体积模量及其一阶压力导数的值。从模型计算中可以看出，熔融温度随压力的增加而增加，但不是线性的。本文的计算结果与已有的模拟结果进行了比较。这种方法是有效的，因为以前的结果和现在的结果很一致。绘制了等温压力、热压和总压作用于固体时熔化温度的变化曲线。本研究有助于定性地了解压力对碱卤化物熔融温度的影响。所使用的模型还可以将结果外推到更高的压力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Temperatures-high Pressures THERMODYNAMICS-MECHANICS

CiteScore

1.00

自引率

9.10%

发文量

期刊介绍： High Temperatures – High Pressures (HTHP) is an international journal publishing original peer-reviewed papers devoted to experimental and theoretical studies on thermophysical properties of matter, as well as experimental and modelling solutions for applications where control of thermophysical properties is critical, e.g. additive manufacturing. These studies deal with thermodynamic, thermal, and mechanical behaviour of materials, including transport and radiative properties. The journal provides a platform for disseminating knowledge of thermophysical properties, their measurement, their applications, equipment and techniques. HTHP covers the thermophysical properties of gases, liquids, and solids at all temperatures and under all physical conditions, with special emphasis on matter and applications under extreme conditions, e.g. high temperatures and high pressures. Additionally, HTHP publishes authoritative reviews of advances in thermophysics research, critical compilations of existing data, new technology, and industrial applications, plus book reviews.