Zobrazit minimální záznam

dc.contributor.authorValášková, Marta
dc.contributor.authorSimha Martynková, Gražyna
dc.contributor.authorSmetana, Bedřich
dc.contributor.authorŠtudentová, Soňa
dc.date.accessioned2009-11-24T14:08:54Z
dc.date.available2009-11-24T14:08:54Z
dc.date.issued2009
dc.identifier.citationApplied Clay Science. 2009, vol. 46, issue 2, p. 196-201.en
dc.identifier.issn0169-1317
dc.identifier.urihttp://hdl.handle.net/10084/76726
dc.description.abstractPorous cordierites were prepared from mixtures of talc, kaolinite and vermiculite with alumina or aluminum hydroxide by sintering in an argon atmosphere at 1300 °C for 1 h (porous cordierites of Group I) and 2 h (porous cordierites of Group II). Group I and Group II were different in pore size distribution, quantitative content of mineral phases and cordierite structure parameters. The crystalline phases identified in porous cordierites prepared without vermiculite were cordierite (69–88 vol.%), protoenstatite (25–13 vol.%) and corundum (3–10 vol.%). Vermiculite increased the content of cordierite (84–90 vol.%) and Mg–Al spinel (4–15 vol.%) at the expense of protoenstatite. The calculated unit cell parameters of cordierites were between those of orthogonal and hexagonal cordierites (Group I) and corresponded to disordered orthorhombic rather than hexagonal cordierites (Group II). Group I cordierites had pore size maxima at about ~ 35 µm or ~ 20 µm, while Group II had maxima at about 35 µm, 25 µm and 18 µm. Porous cordierites prepared from alumina admixture had slightly lower pore volumes than those prepared from gibbsite. Cordierites prepared from mixtures rich in vermiculite and gibbsite showed the highest porosity (63% and 57%).en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.ispartofseriesApplied Clay Scienceen
dc.relation.urihttp://dx.doi.org/10.1016/j.clay.2009.08.003en
dc.subjecttalcen
dc.subjectkaoliniteen
dc.subjectvermiculiteen
dc.subjectcordieriteen
dc.subjectphase analysisen
dc.subjectporosityen
dc.titleInfluence of vermiculite on the formation of porous cordieritesen
dc.typearticleen
dc.identifier.locationNení ve fondu ÚKen
dc.identifier.doi10.1016/j.clay.2009.08.003
dc.identifier.wos000271536800012


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