{"title":"倍半硅氧烷和Boehmite前驱体的莫来石化动力学","authors":"R. Anand, Anshuman Mohanty, S. Behera","doi":"10.1080/0371750X.2020.1869101","DOIUrl":null,"url":null,"abstract":"Mullite ceramics was synthesized using boehmite (-AlOOH) as alumina source and polymethysilsesquioxanes (PMS), a novel class of preceramic polymer, as silica source. Quantitative mullitization was calculated from the X-ray diffractograms of powder samples of appropriate stoichiometry of the precursors calcined for various holding times between 1200o and 1300oC, using Rietveld analysis, and the kinetics of phase formation was studied. The rate constant and activation energy of mullitization was calculated by the Johnson-Mehl-Avrami equation. This approach holds great potential for the commercial use of polymeric silica precursor for the fabrication of highly pure mullite and other silicate systems for various application such as thermal and environmental barrier coatings. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0371750X.2020.1869101","citationCount":"0","resultStr":"{\"title\":\"Kinetics of Mullitization from Polysilsesquioxane and Boehmite Precursors\",\"authors\":\"R. Anand, Anshuman Mohanty, S. Behera\",\"doi\":\"10.1080/0371750X.2020.1869101\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Mullite ceramics was synthesized using boehmite (-AlOOH) as alumina source and polymethysilsesquioxanes (PMS), a novel class of preceramic polymer, as silica source. Quantitative mullitization was calculated from the X-ray diffractograms of powder samples of appropriate stoichiometry of the precursors calcined for various holding times between 1200o and 1300oC, using Rietveld analysis, and the kinetics of phase formation was studied. The rate constant and activation energy of mullitization was calculated by the Johnson-Mehl-Avrami equation. This approach holds great potential for the commercial use of polymeric silica precursor for the fabrication of highly pure mullite and other silicate systems for various application such as thermal and environmental barrier coatings. GRAPHICAL ABSTRACT\",\"PeriodicalId\":23233,\"journal\":{\"name\":\"Transactions of the Indian Ceramic Society\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2021-01-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1080/0371750X.2020.1869101\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Transactions of the Indian Ceramic Society\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1080/0371750X.2020.1869101\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of the Indian Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/0371750X.2020.1869101","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Kinetics of Mullitization from Polysilsesquioxane and Boehmite Precursors
Mullite ceramics was synthesized using boehmite (-AlOOH) as alumina source and polymethysilsesquioxanes (PMS), a novel class of preceramic polymer, as silica source. Quantitative mullitization was calculated from the X-ray diffractograms of powder samples of appropriate stoichiometry of the precursors calcined for various holding times between 1200o and 1300oC, using Rietveld analysis, and the kinetics of phase formation was studied. The rate constant and activation energy of mullitization was calculated by the Johnson-Mehl-Avrami equation. This approach holds great potential for the commercial use of polymeric silica precursor for the fabrication of highly pure mullite and other silicate systems for various application such as thermal and environmental barrier coatings. GRAPHICAL ABSTRACT
期刊介绍：
Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family.
The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.
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