Impact of Fly Ash as a Raw Material on the Properties of Refractory Forsterite–Spinel Ceramics

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dc.contributor.authorNguyen, Martincs
dc.contributor.authorSokolář, Radomírcs
dc.coverage.issue9cs
dc.coverage.volume10cs
dc.date.issued2020-09-22cs
dc.description.abstractThis article examines the process for the synthesis of forsterite-spinel (2MgO center dot SiO2/MgO center dot Al2O3) refractory ceramics from fly ash and alumina as sources of aluminum oxide. Raw materials were milled, mixed in different ratios and sintered at 1500 degrees C for 2 h. Sintered samples were characterized by XRD, thermal analyses and SEM. Porosity, water absorption, bulk density, refractoriness, refractoriness under load and thermal shock resistance were also investigated. The impact of fly ash as a raw material was investigated in accordance with the resulting properties and microstructure of samples with fly ash and alumina as the raw materials. Due to the positive effect of flux oxides (iron oxides and alkalis) on sintering, the mullite contained in fly ash completely decomposed into silica and alumina, which, together with magnesium oxide, formed spinel. This led to improved microstructural and mechanical properties and thermal shock resistance. In particular, mixtures with 10 wt.% and 20 wt.% of fly ash had the most promising results compared to alumina mixtures. Both modulus of rupture and thermal shock resistance were improved, while the impact on refractory properties was minimal. The novelty of this research lies in the recycling of fly ash, a by-product from coal-burning power plants, into a raw material for the production of forsterite-spinel refractory ceramics.en
dc.formattextcs
dc.format.extent1-12cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMinerals. 2020, vol. 10, issue 9, p. 1-12.en
dc.identifier.doi10.3390/min10090835cs
dc.identifier.issn2075-163Xcs
dc.identifier.orcid0000-0003-1321-2785cs
dc.identifier.orcid0000-0001-6913-2018cs
dc.identifier.other165351cs
dc.identifier.researcheridAAQ-4131-2020cs
dc.identifier.researcheridACI-9142-2022cs
dc.identifier.scopus57203352861cs
dc.identifier.scopus15066105400cs
dc.identifier.urihttp://hdl.handle.net/11012/195739
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMineralscs
dc.relation.urihttps://www.mdpi.com/2075-163X/10/9/835cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2075-163X/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectsinteringen
dc.subjectspinelen
dc.subjectforsteriteen
dc.subjectrefractory ceramicsen
dc.subjectfly ashen
dc.subjectaluminaen
dc.titleImpact of Fly Ash as a Raw Material on the Properties of Refractory Forsterite–Spinel Ceramicsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-165351en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:45:53en
sync.item.modts2025.01.17 15:24:04en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav technologie stavebních hmot a dílcůcs
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