Influence of ethanol addition on the microstructure of ceramic foams prepared by yeast-mediated biological foaming of alumina suspensions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F14%3A43898210" target="_blank" >RIV/60461373:22310/14:43898210 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of ethanol addition on the microstructure of ceramic foams prepared by yeast-mediated biological foaming of alumina suspensions

Popis výsledku v původním jazyce

The influence of ethanol addition on the microstructure of ceramic foams prepared by yeast-mediated biological foaming of alumina suspensions is investigated, and two new process variants are proposed. It has been found that ethanol additions of more than 5 % have a significant effect on the (total) porosity and the pore size of cellular alumina. Porosities in the range 78-84 % can be readily achieved by this process without additional ethanol or with ethanol additions below 5 wt.%, whereas porosities in the range 46-76 % are obtained when the ethanol additions in the alumina suspensions are in the range 7.5-25 wt.%. That means, ethanol addition is an efficient tool for controlling the porosity of alumina foams and thus for tailoring the microstructure-sensitive properties. Apart from that, ethanol addition has a significant influence on the pore size. Mean pore sizes are in the range 0.7-1.4 mm for ethanol contents below 5 wt.%, but only approx. 0.5 mm for ethanol contents of 10 wt.%.

Název v anglickém jazyce

Influence of ethanol addition on the microstructure of ceramic foams prepared by yeast-mediated biological foaming of alumina suspensions

Popis výsledku anglicky

The influence of ethanol addition on the microstructure of ceramic foams prepared by yeast-mediated biological foaming of alumina suspensions is investigated, and two new process variants are proposed. It has been found that ethanol additions of more than 5 % have a significant effect on the (total) porosity and the pore size of cellular alumina. Porosities in the range 78-84 % can be readily achieved by this process without additional ethanol or with ethanol additions below 5 wt.%, whereas porosities in the range 46-76 % are obtained when the ethanol additions in the alumina suspensions are in the range 7.5-25 wt.%. That means, ethanol addition is an efficient tool for controlling the porosity of alumina foams and thus for tailoring the microstructure-sensitive properties. Apart from that, ethanol addition has a significant influence on the pore size. Mean pore sizes are in the range 0.7-1.4 mm for ethanol contents below 5 wt.%, but only approx. 0.5 mm for ethanol contents of 10 wt.%.

Druh

D - Stať ve sborníku

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

—

Projekt

<a href="/cs/project/GAP108%2F12%2F1170" target="_blank" >GAP108/12/1170: Porézní keramika s řízenou elasticitou a tepelnou vodivostí</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 10th International Conference on Polysaccharides - Glycoscience

ISBN

978-80-86238-70-8

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

48-53

Název nakladatele

Česká chemická společnost

Místo vydání

Praha

Místo konání akce

Prague, Czech Republic

Datum konání akce

22. 10. 2014

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—