Mechanical properties of starch-zirconia composites - their relation to composition and microstructure

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical properties of starch-zirconia composites - their relation to composition and microstructure

Popis výsledku v původním jazyce

The mechanical properties of starch-zirconia composites, prepared by starch consolidation casting, and their as-fired counterparts (porous zirconia ceramics) are investigated. The elastic modulus and strength can be controlled by selecting the starch type and fine-tuned by applying starch mixtures. Rice starch enhances both the Young's modulus and the flexural strength. For bodies with 30 vol.% of starch, the bulk densities are 2.17-2.47 g/cm3. Young's moduli can attain values of up to 7 GPa, while flexural strengths attain values up to 12 MPa, with a close correlation to bulk density. After firing porous zirconia ceramics are obtained, in which the bulk density differences are retained, leading to total porosities of 34, 26 and 21 % when using 30 vol.% of potato, corn and rice starch, respectively. Young's moduli are of order 60-120 GPa. Irrespective of the starch type, they exhibit a strong correlation to porosity, which is best described by an exponential relation.

Název v anglickém jazyce

Mechanical properties of starch-zirconia composites - their relation to composition and microstructure

Popis výsledku anglicky

The mechanical properties of starch-zirconia composites, prepared by starch consolidation casting, and their as-fired counterparts (porous zirconia ceramics) are investigated. The elastic modulus and strength can be controlled by selecting the starch type and fine-tuned by applying starch mixtures. Rice starch enhances both the Young's modulus and the flexural strength. For bodies with 30 vol.% of starch, the bulk densities are 2.17-2.47 g/cm3. Young's moduli can attain values of up to 7 GPa, while flexural strengths attain values up to 12 MPa, with a close correlation to bulk density. After firing porous zirconia ceramics are obtained, in which the bulk density differences are retained, leading to total porosities of 34, 26 and 21 % when using 30 vol.% of potato, corn and rice starch, respectively. Young's moduli are of order 60-120 GPa. Irrespective of the starch type, they exhibit a strong correlation to porosity, which is best described by an exponential relation.

Druh

D - Stať ve sborníku

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 7th International Conference on Polysaccharides - Glycoscience

ISBN

978-80-86238-90-6

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

27-32

Název nakladatele

Česká společnost chemická

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

2. 11. 2011

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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