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Effect of metallic Si addition on polymerization degree of in situ foamed alkali-aluminosilicates
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SYSNO ASEP 0420821 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of metallic Si addition on polymerization degree of in situ foamed alkali-aluminosilicates Author(s) Medri, V. (IT)
Papa, E. (IT)
Dědeček, Jiří (UFCH-W) RID, ORCID
Jirglová, Hana (UFCH-W) RID, ORCID
Benito, P. (IT)
Vaccari, A. (IT)
Landi, E. (IT)Source Title Ceramics International. - : Elsevier - ISSN 0272-8842
Roč. 39, č. 7 (2013), s. 7657-7668Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords B. porosity ; alkali-bonded ceramics ; geopolymerization Subject RIV CF - Physical ; Theoretical Chemistry Institutional support UFCH-W - RVO:61388955 UT WOS 000325443300049 EID SCOPUS 84880319218 DOI 10.1016/j.ceramint.2013.02.104 Annotation Geopolymerization is an aqueous based process to produce synthetic alkali-aluminosilicates with porosity that can be tailored from the nano- to the ultra-macrometric range. In order to fulfill the requirements for many different applications and porous 3D networks (namely alkali-aluminosilicate foams) were prepared by inducing interconnected ultra-macro-porosity (up to the millimeter range) in the alkali-bonded Matrices, exploiting the ability of silicon powder to generate H-2 in the aqueous medium. Being H-2 the product of a water-consuming process which competes with geopolymerization, the process parameters and the characteristics of the resulting foamed materials are strongly influenced by the amount of added silicon. Polymerization degree, accessibility of the geopolymer inner volume and the micro-ultra-macro-structure of the foams were determined and related to the process parameters of the contemporary geopolymerization and foaming. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2014
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