In this paper crystallization kinetics of potassium-based geopolymer (Si/Al = 2.5, denoted as KG2.5) upon heating are investigated by differential thermal analysis (DTA) under non-isothermal conditions at various heating rates. From 35 to 700 degrees C KG2.5 shows a significant weight loss due to both evaporation of free water and condensation of hydroxyl groups. Crystallization of KG2.5 starts at a low temperature of, similar to 960 degrees C according to XRD and DTA analysis. KG2.5 also exhibits a low onset temperature of viscous sintering stage and on heating to 950 degrees C the sintering is completed. In the DTA graphs, the exothermic peaks which are caused by leucite crystallization shift to higher temperatures with increasing heating rate. The activation energy value of crystallization for leucite is found to be 455.9 kJ/mol and the corresponding Avarami constant is 3.89 indicating the three-dimensional crystal growth mechanism. Crown Copyright (C) 2010 Published by Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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Univ Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USAUniv Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA
Sankar, Kaushik
Sa Ribeiro, Ruy A.
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Univ Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA
Natl Inst Amazonian Res, Struct Engn Lab, Manaus, Amazonas, BrazilUniv Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA
Sa Ribeiro, Ruy A.
Ribeiro, Marilene G. Sa
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Natl Inst Amazonian Res, Struct Engn Lab, Manaus, Amazonas, BrazilUniv Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA
Ribeiro, Marilene G. Sa
Kriven, Waltraud M.
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Univ Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA
Amer Ceram Soc, Westerville, OH USAUniv Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA
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Univ West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech RepublicUniv West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech Republic
Kovarik, Tomas
Hajek, Jiri
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Univ West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech RepublicUniv West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech Republic
Hajek, Jiri
Pola, Michal
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Univ West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech RepublicUniv West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech Republic
Pola, Michal
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Rieger, David
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Svoboda, Milos
Benes, Jan
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Univ West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech RepublicUniv West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech Republic
Benes, Jan
Sutta, Pavol
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Univ West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech RepublicUniv West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech Republic
Sutta, Pavol
Deshmukh, Kalim
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Univ West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech RepublicUniv West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech Republic
Deshmukh, Kalim
Jandova, Vera
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Univ West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech Republic
ASCR, Inst Chem Proc Fundamentals, Vvi, Prague 16502, Czech RepublicUniv West Bohemia, New Technol Res Ctr, 8 Univ, Plzen 30614, Czech Republic
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Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Nanoforce Technol Ltd, London E1 4NS, EnglandQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Yu, Min
Bernardo, Enrico
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Univ Padua, Dipartimento Ingn Ind, Via Marzolo 9, I-35131 Padua, ItalyQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Bernardo, Enrico
Colombo, Paolo
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Univ Padua, Dipartimento Ingn Ind, Via Marzolo 9, I-35131 Padua, ItalyQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Colombo, Paolo
Romero, Acacio R.
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Univ Padua, Dipartimento Ingn Ind, Via Marzolo 9, I-35131 Padua, ItalyQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Romero, Acacio R.
Tatarko, Peter
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Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Slovak Acad Sci, Inst Inorgan Chem, Dubravska Cesta 9, Bratislava 84536, SlovakiaQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Tatarko, Peter
Kannuchamy, Vasanth K.
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Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, EnglandQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Kannuchamy, Vasanth K.
Titirici, Maria-Magdalena
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Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, EnglandQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Titirici, Maria-Magdalena
Castle, Elinor G.
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Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Nanoforce Technol Ltd, London E1 4NS, EnglandQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Castle, Elinor G.
Picot, Olivier T.
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Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Nanoforce Technol Ltd, London E1 4NS, EnglandQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Picot, Olivier T.
Reece, Michael J.
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Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
Nanoforce Technol Ltd, London E1 4NS, EnglandQueen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England
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Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
Harbin Inst Technol, Harbin 150006, Peoples R ChinaUniv Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
Xie, Ning
Bell, Jonathan. L.
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Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USAUniv Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
Bell, Jonathan. L.
Krivenw, Waltraud M.
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Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USAUniv Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
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Univ Lille, CNRS, UMR 8207, INRAE,Cent Lille,UMET Unite Mat & Transformat, F-59000 Lille, FranceUniv Lille, CNRS, UMR 8207, INRAE,Cent Lille,UMET Unite Mat & Transformat, F-59000 Lille, France
Yang, Qi
Davy, Catherine A.
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Ecole Natl Super Arts & Metiers, Arts & Metiers ParisTech, F-49035 Angers, France
Sorbonne Univ, CNRS, EPHE, UMR Metis 7619, 4 Pl Jussieu, F-75005 Paris, FranceUniv Lille, CNRS, UMR 8207, INRAE,Cent Lille,UMET Unite Mat & Transformat, F-59000 Lille, France
Davy, Catherine A.
Sarazin, Johan
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Univ Lille, CNRS, UMR 8207, INRAE,Cent Lille,UMET Unite Mat & Transformat, F-59000 Lille, FranceUniv Lille, CNRS, UMR 8207, INRAE,Cent Lille,UMET Unite Mat & Transformat, F-59000 Lille, France
Sarazin, Johan
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Bourbigot, Serge
Fontaine, Gaelle
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Univ Lille, CNRS, UMR 8207, INRAE,Cent Lille,UMET Unite Mat & Transformat, F-59000 Lille, FranceUniv Lille, CNRS, UMR 8207, INRAE,Cent Lille,UMET Unite Mat & Transformat, F-59000 Lille, France