Fabrication and characterization of porous mullite ceramics derived from fluoride-assisted Metakaolin-Al(OH)3 annealing for filtration applications

dc.contributor.authorAbdullayev, Amanmyrat
dc.contributor.authorAvcioglu, Celal
dc.contributor.authorFey, Tobias
dc.contributor.authorHilger, André
dc.contributor.authorOsenberg, Markus
dc.contributor.authorManke, Ingo
dc.contributor.authorHenning, Laura M.
dc.contributor.authorGurlo, Aleksander
dc.contributor.authorBekheet, Maged F.
dc.date.accessioned2022-08-01T14:50:02Z
dc.date.available2022-08-01T14:50:02Z
dc.date.issued2022-02-23
dc.description.abstractIn this work, polycrystalline mullite whiskers are synthesized by fluoride-assisted method from metakaolin and several aluminum-containing compounds such as γ-Al(OH)3, AlF3·3H2O, and α-Al2O3 (corundum). The mullite formation and crystallization are assessed both in ex situ and in situ synchrotron X-ray diffraction experiments under synthesis conditions. Polycrystalline mullite starts to form from metakaolin, Al(OH)3, and AlF3·3H2O reactants at 680 °C, whereas mullite does not form even at 1000 °C when corundum is used. Porous mullite ceracmics are fabricated at sintering temperatures between 1000 and 1700 °C and tested for water permeance. Scanning Electron Microscopy (SEM) and synchrotron X-ray tomography (μCT) reveal that ceramics are comprised of pore channels with an interlocked network of mullite whiskers. With competitive porosity (up to 63 %), compressive strength (up to 20 MPa), and pure water flux (up to 579 L/m2·h at 1 bar), fabricated mullite ceramics are promising candidates for water filtration and purification.en
dc.identifier.eissn2666-5395
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/17289
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-16069
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-15348
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc666 Keramiktechnologie und zugeordnete Technologiende
dc.subject.ddc679 Andere Produkte aus einzelnen Werkstoffende
dc.subject.othermullite whiskersen
dc.subject.otherceramic membranesen
dc.subject.otherwater filtrationen
dc.subject.otherin situ synchrotron X-ray diffractionen
dc.subject.othersynchrotron X-ray tomographyen
dc.subject.otherμCTen
dc.titleFabrication and characterization of porous mullite ceramics derived from fluoride-assisted Metakaolin-Al(OH)3 annealing for filtration applicationsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber100240en
dcterms.bibliographicCitation.doi10.1016/j.oceram.2022.100240en
dcterms.bibliographicCitation.journaltitleOpen Ceramicsen
dcterms.bibliographicCitation.originalpublishernameElsevieren
dcterms.bibliographicCitation.originalpublisherplaceAmsterdamen
dcterms.bibliographicCitation.volume9en
tub.accessrights.dnbfreeen
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Werkstoffwissenschaften und -technologien::FG Keramische Werkstoffede
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.groupFG Keramische Werkstoffede
tub.affiliation.instituteInst. Werkstoffwissenschaften und -technologiende
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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