Synthesis and characterization of silicon carbide powders converted from metakaolin-based geopolymer

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dc.authorid0000-0001-9931-0778
dc.contributor.authorBağcı, Cengiz
dc.contributor.authorKutyla, Gregory P.
dc.contributor.authorSeymour, Kevin C.
dc.contributor.authorKriven, Waltraud M.
dc.date.accessioned2019-05-10T09:38:46Z
dc.date.available2019-05-10T09:38:46Z
dc.date.issued2016
dc.departmentHitit Üniversitesi, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü
dc.description.abstractSilicon carbide (SiC) ceramic powders were synthesized by carbothermal reduction in specific geopolymers containing carbon nanopowders. Geopolymers containing carbon and having a composition M2O·Al2O3·4.5SiO2·12H2O+18C, where M is an alkali metal cation (Na+, K+, and Cs+) were carbothermally reacted at 1400°C, 1500°C, and 1600°C, respectively, for 2 h under flowing argon. X-ray diffraction and microstructural investigations by SEM/EDS and TEM were made. The geopolymers were gradually crystallized into SiC on heating above 1400°C and underwent significant weight loss. SiC was seen as the major phase resulting from Na-based geopolymer heated to ?1400°C, even though a minor amount of Al2O3 was also formed. However, phase pure SiC resulted with increasing temperature. While a slight increment of the Al2O3 amount was seen in potassium geopolymer, Al2O3 essentially replaced cesium geopolymer on heating to 1600°C. SEM revealed that SiC formation and a compositionally variable Al2O3 content depended on the alkaline composition. Sodium geopolymer produced high SiC conversion into fibrous and globular shapes ranging from ~5 ?m to nanosize, as seen by X-ray diffraction as well as SEM and TEM, respectively. © 2016 The American Ceramic Society
dc.identifier.citationBagci, C., Kutyla, G.P., Seymour, K.C., Kriven, W.M. (2016). Synthesis and characterization of silicon carbide powders converted from metakaolin-based geopolymer. Journal of the American Ceramic Society, 99(7), 2521–2530.
dc.identifier.doi10.1111/jace.14254
dc.identifier.endpage2530en_US
dc.identifier.issn0002-7820
dc.identifier.issue7en_US
dc.identifier.scopusqualityQ1
dc.identifier.startpage2521en_US
dc.identifier.urihttps://doi.org/10.1111/jace.14254
dc.identifier.urihttps://hdl.handle.net/11491/461
dc.identifier.volume99en_US
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherBlackwell Publishing Inc.
dc.relation.ispartofJournal of the American Ceramic Society
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectGeopolymersen_US
dc.subjectNanoparticlesen_US
dc.subjectSilicon Carbideen_US
dc.subjectSynthesisen_US
dc.titleSynthesis and characterization of silicon carbide powders converted from metakaolin-based geopolymer
dc.typeArticle

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