{"title":"Li2CO3-Na2CO3-K2CO3/MgO非均相体系的物理化学性质","authors":"I. Zakiryanova, E. Nikolaeva, I. Korzun","doi":"10.2298/jsc230201023z","DOIUrl":null,"url":null,"abstract":"The structure, conductivity, melting points and caloric melting effects of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder heterogeneous system with MgO concentration up to 70 vol % have been investigated. A wide variety of methods (DSC, XRD, BET, high resolution scanning electron microscope, AC impedance method, IR and Raman spectroscopy) were used to evaluate samples and research. It is revealed that at the values of effective thickness of the salt phase interlayer between MgO particles below 100 nm there is an abrupt decrease in the melting points of the salt and the normalized phase transition enthalpy of the heterogeneous system. The activation energy of the electrical conductivity rises as the values of effective thickness of the melt phase interlayer between MgO particles decreases. The study established the lack of any chemical interaction between MgO and carbonate melt at 400-600??. In situ Raman spectroscopy of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder systems revealed the solvation of solid particles by salt-melt ions.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Physicochemical properties of the heterogeneous system Li2CO3-Na2CO3-K2CO3/MgO\",\"authors\":\"I. Zakiryanova, E. Nikolaeva, I. Korzun\",\"doi\":\"10.2298/jsc230201023z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The structure, conductivity, melting points and caloric melting effects of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder heterogeneous system with MgO concentration up to 70 vol % have been investigated. A wide variety of methods (DSC, XRD, BET, high resolution scanning electron microscope, AC impedance method, IR and Raman spectroscopy) were used to evaluate samples and research. It is revealed that at the values of effective thickness of the salt phase interlayer between MgO particles below 100 nm there is an abrupt decrease in the melting points of the salt and the normalized phase transition enthalpy of the heterogeneous system. The activation energy of the electrical conductivity rises as the values of effective thickness of the melt phase interlayer between MgO particles decreases. The study established the lack of any chemical interaction between MgO and carbonate melt at 400-600??. In situ Raman spectroscopy of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder systems revealed the solvation of solid particles by salt-melt ions.\",\"PeriodicalId\":17489,\"journal\":{\"name\":\"Journal of The Serbian Chemical Society\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of The Serbian Chemical Society\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.2298/jsc230201023z\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Serbian Chemical Society","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.2298/jsc230201023z","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Physicochemical properties of the heterogeneous system Li2CO3-Na2CO3-K2CO3/MgO
The structure, conductivity, melting points and caloric melting effects of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder heterogeneous system with MgO concentration up to 70 vol % have been investigated. A wide variety of methods (DSC, XRD, BET, high resolution scanning electron microscope, AC impedance method, IR and Raman spectroscopy) were used to evaluate samples and research. It is revealed that at the values of effective thickness of the salt phase interlayer between MgO particles below 100 nm there is an abrupt decrease in the melting points of the salt and the normalized phase transition enthalpy of the heterogeneous system. The activation energy of the electrical conductivity rises as the values of effective thickness of the melt phase interlayer between MgO particles decreases. The study established the lack of any chemical interaction between MgO and carbonate melt at 400-600??. In situ Raman spectroscopy of the (Li2CO3-Na2CO3-K2CO3)eut melt/MgO nanopowder systems revealed the solvation of solid particles by salt-melt ions.
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The Journal of the Serbian Chemical Society -JSCS (formerly Glasnik Hemijskog društva Beograd) publishes articles original papers that have not been published previously, from the fields of fundamental and applied chemistry:
Theoretical Chemistry, Organic Chemistry, Biochemistry and Biotechnology, Food Chemistry, Technology and Engineering, Inorganic Chemistry, Polymers, Analytical Chemistry, Physical Chemistry, Spectroscopy, Electrochemistry, Thermodynamics, Chemical Engineering, Textile Engineering, Materials, Ceramics, Metallurgy, Geochemistry, Environmental Chemistry, History of and Education in Chemistry.
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