{"title":"Calculation of Heat Capacity and Coefficients of Linear Thermal Expansion of Light and Heavy Platinum Triad Metals","authors":"S. V. Terekhov","doi":"10.1134/s0018151x23050188","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The relations of the model of a two-phase local equilibrium region are used to calculate the temperature dependences of the heat capacities and coefficients of thermal linear expansion of the palladium triad (Ru, Rh, Pd) and platinum triad (Os, Ir, Pt) in the presence (absence) of an aggregate transition in the studied temperature range. In contrast to the approximation functions used in the scientific literature in individual temperature intervals (using, in particular, the Einstein function), the proposed formulas are simple, universal, and adequately describe the experimental data in the temperature range from 0 K to high temperatures. They can be used to create computer programs for calculating the specified characteristics of various solids, for example, when developing technologies for the rational use of noble metals.</p>","PeriodicalId":13163,"journal":{"name":"High Temperature","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"High Temperature","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1134/s0018151x23050188","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
The relations of the model of a two-phase local equilibrium region are used to calculate the temperature dependences of the heat capacities and coefficients of thermal linear expansion of the palladium triad (Ru, Rh, Pd) and platinum triad (Os, Ir, Pt) in the presence (absence) of an aggregate transition in the studied temperature range. In contrast to the approximation functions used in the scientific literature in individual temperature intervals (using, in particular, the Einstein function), the proposed formulas are simple, universal, and adequately describe the experimental data in the temperature range from 0 K to high temperatures. They can be used to create computer programs for calculating the specified characteristics of various solids, for example, when developing technologies for the rational use of noble metals.
摘要 在研究的温度范围内，利用两相局部平衡区模型的关系来计算存在（不存在）聚集转变的钯三元化合物（Ru、Rh、Pd）和铂三元化合物（Os、Ir、Pt）的热容量和热线性膨胀系数的温度相关性。与科学文献在个别温度区间使用的近似函数（特别是使用爱因斯坦函数）相比，所提出的公式简单、通用，并能充分描述从 0 K 到高温的温度范围内的实验数据。这些公式可用于创建计算机程序，用于计算各种固体的特定特性，例如，在开发合理使用贵金属的技术时。
期刊介绍：
High Temperature is an international peer reviewed journal that publishes original papers and reviews written by theoretical and experimental researchers. The journal deals with properties and processes in low-temperature plasma; thermophysical properties of substances including pure materials, mixtures and alloys; the properties in the vicinity of the critical point, equations of state; phase equilibrium; heat and mass transfer phenomena, in particular, by forced and free convections; processes of boiling and condensation, radiation, and complex heat transfer; experimental methods and apparatuses; high-temperature facilities for power engineering applications, etc. The journal reflects the current trends in thermophysical research. It presents the results of present-day experimental and theoretical studies in the processes of complex heat transfer, thermal, gas dynamic processes, and processes of heat and mass transfer, as well as the latest advances in the theoretical description of the properties of high-temperature media.
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