{"title":"利用Kissinger方程的体积法数据求氢化物分解活化能的简单方法","authors":"M. Song, Y. Kwak","doi":"10.5755/j02.ms.32434","DOIUrl":null,"url":null,"abstract":"Thermal analysis methods - such as TGA, DSC analysis, DTA, and TDS analysis - have been used in many reports to determine the activation energy for hydride decomposition. In our preceding work, we showed that the dehydriding rate of Mg-5Ni samples obeyed the first-order law and the Kissinger equation could thus be used to determine the activation energy. In the present work, we used the Mg-5Ni samples after activation. We obtained Tm at different heating rates by finding the temperature at which the ratio of the desorbed hydrogen quantity Hd change to T change, dHd/dT, was the highest from the desorbed hydrogen quantity Hd versus temperature T curves. Tm’s at different heating rates were also obtained from points of inflection (Φ = dT/dt = 0) in temperature T versus time t curves. The activation energy for hydride decomposition was then calculated by applying Tm’s at different heating rates to the Kissinger equation.","PeriodicalId":18298,"journal":{"name":"Materials Science-medziagotyra","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Simple Ways to Obtain Activation Energy for Hydride Decomposition by Applying Data from a Volumetric Method to the Kissinger Equation\",\"authors\":\"M. Song, Y. Kwak\",\"doi\":\"10.5755/j02.ms.32434\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Thermal analysis methods - such as TGA, DSC analysis, DTA, and TDS analysis - have been used in many reports to determine the activation energy for hydride decomposition. In our preceding work, we showed that the dehydriding rate of Mg-5Ni samples obeyed the first-order law and the Kissinger equation could thus be used to determine the activation energy. In the present work, we used the Mg-5Ni samples after activation. We obtained Tm at different heating rates by finding the temperature at which the ratio of the desorbed hydrogen quantity Hd change to T change, dHd/dT, was the highest from the desorbed hydrogen quantity Hd versus temperature T curves. Tm’s at different heating rates were also obtained from points of inflection (Φ = dT/dt = 0) in temperature T versus time t curves. The activation energy for hydride decomposition was then calculated by applying Tm’s at different heating rates to the Kissinger equation.\",\"PeriodicalId\":18298,\"journal\":{\"name\":\"Materials Science-medziagotyra\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2023-08-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Science-medziagotyra\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.5755/j02.ms.32434\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science-medziagotyra","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.5755/j02.ms.32434","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Simple Ways to Obtain Activation Energy for Hydride Decomposition by Applying Data from a Volumetric Method to the Kissinger Equation
Thermal analysis methods - such as TGA, DSC analysis, DTA, and TDS analysis - have been used in many reports to determine the activation energy for hydride decomposition. In our preceding work, we showed that the dehydriding rate of Mg-5Ni samples obeyed the first-order law and the Kissinger equation could thus be used to determine the activation energy. In the present work, we used the Mg-5Ni samples after activation. We obtained Tm at different heating rates by finding the temperature at which the ratio of the desorbed hydrogen quantity Hd change to T change, dHd/dT, was the highest from the desorbed hydrogen quantity Hd versus temperature T curves. Tm’s at different heating rates were also obtained from points of inflection (Φ = dT/dt = 0) in temperature T versus time t curves. The activation energy for hydride decomposition was then calculated by applying Tm’s at different heating rates to the Kissinger equation.
期刊介绍:
It covers the fields of materials science concerning with the traditional engineering materials as well as advanced materials and technologies aiming at the implementation and industry applications. The variety of materials under consideration, contributes to the cooperation of scientists working in applied physics, chemistry, materials science and different fields of engineering.