Low- and high-temperature processes and mechanisms in the preparation of porous ceramics via starch consolidation casting

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F10%3A00022942" target="_blank" >RIV/60461373:22310/10:00022942 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Low- and high-temperature processes and mechanisms in the preparation of porous ceramics via starch consolidation casting

Popis výsledku v původním jazyce

Starch consolidation casting (SCC) is a versatile and well established process for shaping ceramic green bodies by casting starch-containing suspensions into impermeable molds. The process is based on the ability of starch to swell and absorb water fromaqueous ceramic suspensions when after heating to approx. 80 °C. The swelling factor is highest for potato starch (3.7) and significantly lower for the other starch types (down to approx. 2). A simple mathematical model is presented that allows the minimum consolidation time to be estimated on the basis of the swelling kinetics of starch granules as measured via laser diffraction. The critical temperature range for starch burnout before sintering the ceramic is 300?500 °C, as determined by thermal analysis (thermogravimetry and differential thermal analysis). In this temperature range gaseous products may ignite, leading to strongly exothermic thermal effects. If the bodies are large and the starch content high this may lead to defects

Název v anglickém jazyce

Low- and high-temperature processes and mechanisms in the preparation of porous ceramics via starch consolidation casting

Popis výsledku anglicky

Starch consolidation casting (SCC) is a versatile and well established process for shaping ceramic green bodies by casting starch-containing suspensions into impermeable molds. The process is based on the ability of starch to swell and absorb water fromaqueous ceramic suspensions when after heating to approx. 80 °C. The swelling factor is highest for potato starch (3.7) and significantly lower for the other starch types (down to approx. 2). A simple mathematical model is presented that allows the minimum consolidation time to be estimated on the basis of the swelling kinetics of starch granules as measured via laser diffraction. The critical temperature range for starch burnout before sintering the ceramic is 300?500 °C, as determined by thermal analysis (thermogravimetry and differential thermal analysis). In this temperature range gaseous products may ignite, leading to strongly exothermic thermal effects. If the bodies are large and the starch content high this may lead to defects

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

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

2010

Kód důvěrnosti údajů

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

Název periodika

Starch/Stärke

ISSN

0038-9056

e-ISSN

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Svazek periodika

62

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000274417100001

EID výsledku v databázi Scopus

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