A. G. Kuzamishev, M. A. Shebzukhova, K. Ch. Bzhikhatlov
{"title":"Size Dependences of the Thermal Physical Properties of Nanoparticles: Entropy and Heat of Melting","authors":"A. G. Kuzamishev, M. A. Shebzukhova, K. Ch. Bzhikhatlov","doi":"10.1134/s0018151x23050097","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In the thermodynamic theory of phase equilibria in disperse systems, the size dependences of jumps in entropy and the heat of fusion of particles (including those in the nanometer range) are obtained with strict and consistent consideration of surface phenomena in the approach with separating surfaces. The consideration is carried out taking into account the dimensional dependences of the molar volume, melting temperature, and interfacial tension. Using the obtained relations, calculations were performed for spherical sodium and tin nanoparticles. This implies a decrease in the entropy and heat of fusion with decreasing nanoparticle size. The results are in close agreement with the experimental and calculated data available in the literature.</p>","PeriodicalId":13163,"journal":{"name":"High Temperature","volume":"13 1","pages":""},"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/s0018151x23050097","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
In the thermodynamic theory of phase equilibria in disperse systems, the size dependences of jumps in entropy and the heat of fusion of particles (including those in the nanometer range) are obtained with strict and consistent consideration of surface phenomena in the approach with separating surfaces. The consideration is carried out taking into account the dimensional dependences of the molar volume, melting temperature, and interfacial tension. Using the obtained relations, calculations were performed for spherical sodium and tin nanoparticles. This implies a decrease in the entropy and heat of fusion with decreasing nanoparticle size. The results are in close agreement with the experimental and calculated data available in the literature.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
