Process control and optimized preparation of porous alumina ceramics by starch consolidation casting

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F11%3A43891532" target="_blank" >RIV/60461373:22310/11:43891532 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2011.05.018" target="_blank" >http://dx.doi.org/10.1016/j.jeurceramsoc.2011.05.018</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2011.05.018" target="_blank" >10.1016/j.jeurceramsoc.2011.05.018</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Process control and optimized preparation of porous alumina ceramics by starch consolidation casting

Popis výsledku v původním jazyce

This work concerns details of porosity and pore size control in starch consolidation casting of alumina ceramics using corn starch. In particular, the influence of the solids loading (68-78 wt.% alumina in suspensions with nominal starch contents of 20-50 vol.%) on the porosity, bulk density and shrinkage of alumina ceramics is studied. The results indicate a linear decrease of the linear shrinkage and the bulk density (and a corresponding increase in porosity) as the alumina concentration increases, with slopes that are independent of the starch content. The pore size is characterized via microscopic image analysis, the pore throat size via mercury porosimetry. Relations between the volumetric shrinkage, porosity and the volume fractions of starch andwater in the suspensions are discussed, and a new concept, called "affine limit porosity" is proposed to explain the apparently paradoxical finding that the porosity increases with increasing alumina content in the suspension.

Název v anglickém jazyce

Process control and optimized preparation of porous alumina ceramics by starch consolidation casting

Popis výsledku anglicky

This work concerns details of porosity and pore size control in starch consolidation casting of alumina ceramics using corn starch. In particular, the influence of the solids loading (68-78 wt.% alumina in suspensions with nominal starch contents of 20-50 vol.%) on the porosity, bulk density and shrinkage of alumina ceramics is studied. The results indicate a linear decrease of the linear shrinkage and the bulk density (and a corresponding increase in porosity) as the alumina concentration increases, with slopes that are independent of the starch content. The pore size is characterized via microscopic image analysis, the pore throat size via mercury porosimetry. Relations between the volumetric shrinkage, porosity and the volume fractions of starch andwater in the suspensions are discussed, and a new concept, called "affine limit porosity" is proposed to explain the apparently paradoxical finding that the porosity increases with increasing alumina content in the suspension.

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

—

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 periodika

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

—

Svazek periodika

31

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

9

Strana od-do

2073-2081

Kód UT WoS článku

000292667300006

EID výsledku v databázi Scopus

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