Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-22T16:02:30.988Z Has data issue: false hasContentIssue false
  • English
  • Français

Physico-Chemical Properties of Illite Suspensions after Cycles of Freezing and Thawing

Published online by Cambridge University Press:  28 February 2024

V. Schwinka  and
H. Mörtel
V. Schwinka*
Affiliation:
Technical University Riga, Institute for Silicate Materials, Azenes Str. 14, LV-1048, Riga, Latvia
H. Mörtel
Affiliation:
University Erlangen Nuerenberg, Institute of Material Science, Glass and Ceramics Department, Martensstraße 5, D-91058, Erlangen, Germany
*
E-mail of corresponding author: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The effect of freezing and thawing on the rheological behavior of illite suspensions was studied by examining viscosity and plasticity. Stability of suspensions was characterized by a hysteresis loop of thixotropy. Thermal gravimetric and differential scanning calorimetry analysis were also used. After initial freezing and thawing, the flow curves of the suspensions show an increased viscosity, an “irregular up line”, and a greater hysteresis loop of thixotropy. The ratios of mean viscosity of previously frozen (F) and control (O) samples (ηF/ηO) for non-expandable 2:1 phyllosilicates ranges from 1.3 to 2.1. Addition of monovalent (0.1% Na2SiO3) and divalent cations (0.3% CaCl2 or BaCl2) increase and decrease the shear-stress difference between F and O samples, respectively. Prior freezing of clay samples results in an increase of plasticity by ∼20–30%. The thermal analysis data of F samples show an increase in weight loss, and a decrease in enthalpy of dehydration. The changes of physico-chemical properties from cycles of freezing and thawing are long lasting. The freezing memory effect of illite-type clays is expected to play an important role in ceramic processing, i.e., casting processes, plastic formation, and sintering.

Keywords

Illite-Type ClaysPlasticityPretreatment With ColdThermal AnalysisThixotropyViscosity
Type
Research Article
Information
Clays and Clay Minerals , Volume 47 , Issue 6 , December 1999 , pp. 718 - 725
Copyright
Copyright © 1999, The Clay Minerals Society

References

Chang, J.C. Lange, F.E. and Pearson, D.S., 1994 Viscosity and yield stress of alumina slurries containing large concentrations of electrolyte Journal of the American Ceramic Society 77 19–26 10.1111/j.1151-2916.1994.tb06952.x.CrossRefGoogle Scholar
Funk, J.E., 1996 The Methylene Blue Index for Whiteware Body Control New York Science of Whiteware, Alfred 6–15.Google Scholar
Guo, L. Zhang, Y. Uchida, N. and Uematsu, K., 1997 Influence of temperature on stability of aqueous alumina slurry containing polyelectrolyte dispersant Journal of the European Ceramic Society 17 345–350 10.1016/S0955-2219(96)00179-3.CrossRefGoogle Scholar
Kahr, G. Madsen, E.T. and Herausgeber, K EE, 1994 Bestimmung der Kationen-austauschvermögens und der Oberfläche von Bentoniten, Mit und Kaolinit durch Methylenblauadsorbtion Berichte der Deutschen Ton- und Tonmineralgruppe, Regensburg 154–159.Google Scholar
Krause, E. Berger, I. Plaue, T. and Schulle, W., 1982 Technologie der Keramik, Bd.2 Berlin VEB Bauwesen.Google Scholar
Kumor, M.K., 1989 Microstructural changes of monomineral clay under cyclic freezing-thawing processes Rozprawka Academia Techniczna Polska, Bydgoszovy 34 1–139.Google Scholar
Mörtel, H. Cimmers, A. Schwinka, V., Braga, I. Cavalini, S. and Cesare, EG D, 1995 The influence of porosing additive on properties of Latvian bricks Fourth Euro-Ceramics Conference, Volume 12, Bricks and Roofing Tiles Italy CNR — IRTEC 107–116.Google Scholar
Murad, E. and Wagner, U., 1996 The thermal behavior of an Fe-rich illite Clay Minerals 6 45–52 10.1180/claymin.1996.031.1.04.CrossRefGoogle Scholar
Post, E. Winkler, S. and Selb, , 1992 Characterization of ceramic materials by thermal analysis Keramische Zeitschrift 44 762–766 (in German).Google Scholar
Salmang, H. and Scholze, H., 1982 Keramik. Teil I. Allgemeine Grundlagen und wichtige Eigenschaften Berlin Springer-Verlag 10.1002/crat.2170171119.CrossRefGoogle Scholar
Schababerle, R. Wagner, I.E. and Czurda, K.A., 1988 Influence of freeze-thaw-cycles on clay structures Tone in der Umwelttechnik 247–273.Google Scholar
Schober, G., 1991 Characterization of plastic clay masses processing and the effect of microorganisms .Google Scholar
Schwinka, V. and Mörtel, H., 1995 Der Einwirkung vorhergehender Kälteeinwirkung auf physikochemische Eigenschaften von Tonen Sprechsaal Keramik Materials 128 1–5.Google Scholar
Schwinka, V. Mörtel, H., Braga, I. Cavalini, S. and Cesare, EG D, 1995 The influence of additives on the “Freezing-memory effect” of Baltic clays Fourth Euro-Ceramics Conference, Volume 12, Bricks and Roofing Tiles Italy CNR — IRTEC 97–105.Google Scholar
Sposito, G. and Prost, R., 1982 Structure of water adsorbed on Smectites Chemical Reviews 82 553–573 10.1021/cr00052a001.CrossRefGoogle Scholar
Suzuki, K. Hiroyuki, M. and Toshiani, M., 1988 Non-frozen water in the frozen paste of montmorillonite. The influence of replaceable cations on the amount of non-frozen water. II Reports of the Industrial Research Institute of Nagoya 137 256–260.Google Scholar
Xu, Z. and Yoon, R.H., 1989 A study of hydrophobic coagulation Journal of Colloid Interface Science 134 427–434 10.1016/0021-9797(90)90153-F.CrossRefGoogle Scholar