About: Polysaccharides as creators of different ceramic microstructures

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Polysaccharides are widely used auxiliaries in ceramic technology today. Typical microstructures are shown for porous alumina made with wheat flour, porous alumina-zirconia composites (ZTA ceramics) made with corn starch and dense zirconia ceramics made with carrageenan. SEM mircographs indicate a hierarchically porous microstructure with very large (approx. 200 microns) pores for alumina made with wheat flour (in fact a foaming-assisted starch consolidation process) and confirm that the mercury porosimetry results must be interpreted in terms of pore throat size distributions (also for ZTA ceramics made with corn starch). Total porosities of 60 % can readily be obtained when using wheat flour (50 % with corn starch). Zirconia ceramics made by carrageenan gelcasting can be sintered to almost full density (total porosities { 2 %) while retaining a reasonably fine grain size (0.5-2 microns). However, dimensional control may be a problem due to the high shrinkage for carrageenan gelcasting (more than 40 %, in contrast to 20-25 % for starch consolidation casting). Reasons for these differences are discussed. Polysaccharides are widely used auxiliaries in ceramic technology today. Typical microstructures are shown for porous alumina made with wheat flour, porous alumina-zirconia composites (ZTA ceramics) made with corn starch and dense zirconia ceramics made with carrageenan. SEM mircographs indicate a hierarchically porous microstructure with very large (approx. 200 microns) pores for alumina made with wheat flour (in fact a foaming-assisted starch consolidation process) and confirm that the mercury porosimetry results must be interpreted in terms of pore throat size distributions (also for ZTA ceramics made with corn starch). Total porosities of 60 % can readily be obtained when using wheat flour (50 % with corn starch). Zirconia ceramics made by carrageenan gelcasting can be sintered to almost full density (total porosities { 2 %) while retaining a reasonably fine grain size (0.5-2 microns). However, dimensional control may be a problem due to the high shrinkage for carrageenan gelcasting (more than 40 %, in contrast to 20-25 % for starch consolidation casting). Reasons for these differences are discussed. (en)
Title	Polysaccharides as creators of different ceramic microstructures Polysaccharides as creators of different ceramic microstructures (en)
skos:prefLabel	Polysaccharides as creators of different ceramic microstructures Polysaccharides as creators of different ceramic microstructures (en)
skos:notation	RIV/60461373:22310/11:43892930!RIV12-MSM-22310___
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM6046137302)
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Cílová, Zuzana Gregorová, Eva Pabst, Willi
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	221284
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/11:43892930
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Polysaccharides, starch, wheat flour, carrageenan, dense ceramics, porous ceramics, porosity, pore size, alumina, zirconia, alumina-zirconia composites (ZTA ceramics) (en)
http://linked.open.../riv/klicoveSlovo	starch porosity zirconia Polysaccharides alumina-zirconia composites (ZTA ceramics) carrageenan dense ceramics pore size porous ceramics alumina wheat flour
http://linked.open...ontrolniKodProRIV	[1B9573CCD8B3]
http://linked.open...v/mistoKonaniAkce	Praha
http://linked.open...i/riv/mistoVydani	Praha
http://linked.open...i/riv/nazevZdroje	Proceedings of the 7th International Conference on Polysaccharides - Glycoscience
http://linked.open...in/vavai/riv/obor	JH
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Cílová, Zuzana Gregorová, Eva Pabst, Willi
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2011-11-02 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Preparation and research of functional materials and material technologies using micro- and nanoscopic methods
number of pages	5 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Česká společnost chemická
https://schema.org/isbn	978-80-86238-90-6
http://localhost/t...ganizacniJednotka	22310

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