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Rheological properties of montmorillonitic clay suspensions: Effect of firing and interlayer cations
- Source :
- Journal of the European Ceramic Society, Journal of the European Ceramic Society, Elsevier, 2012, 32 (11), pp.2809, Journal of the European Ceramic Society, Elsevier, 2012, 32 (11), pp.2809-2817. ⟨10.1016/j.jeurceramsoc.2011.11.018⟩
- Publication Year :
- 2012
- Publisher :
- HAL CCSD, 2012.
-
Abstract
- International audience; The effect of a prior firing of three montmorillonite clays, exhibiting different nature of interlayer cations, on the rheological behaviour of related aqueous suspensions (5 and 10. mass% of solid content) was examined. Calcinations were performed at 150 °C, 250 °C, 300 °C or 450 °C for 30 min. The rheological properties were characterized at 25 °C in the flow mode using the Herschel-Bulkley model. The alkaline interlayer cation (Na) tended to increase the yield stress of montmorillonite suspensions in comparison with earth-alkaline ones (Ca, Mg). As expected, increasing solid content led to increasing yield stress. For calcinations until 200 °C, the relevant suspensions exhibited an increasing yield stress due to a gel-like behaviour in relation with a card-house-like structure. Furthermore, calcination above 300 °C favoured the decrease of the corresponding yield stress. This behaviour seemed to be related to the modification of the surface properties of the clay platelets, more precisely to the beginning of clay dehydroxylation.
- Subjects :
- Calcination temperature
Materials science
Mineralogy
02 engineering and technology
01 natural sciences
law.invention
chemistry.chemical_compound
Rheology
law
Interlayer cations
Materials Chemistry
Calcination
Surface interactions
Solid content
[CHIM.MATE] Chemical Sciences/Material chemistry
Aqueous solution
[CHIM.MATE]Chemical Sciences/Material chemistry
021001 nanoscience & nanotechnology
010406 physical chemistry
0104 chemical sciences
Montmorillonite
Chemical engineering
chemistry
Ceramics and Composites
0210 nano-technology
Montmorillonites suspensions
Subjects
Details
- Language :
- English
- ISSN :
- 09552219
- Database :
- OpenAIRE
- Journal :
- Journal of the European Ceramic Society, Journal of the European Ceramic Society, Elsevier, 2012, 32 (11), pp.2809, Journal of the European Ceramic Society, Elsevier, 2012, 32 (11), pp.2809-2817. ⟨10.1016/j.jeurceramsoc.2011.11.018⟩
- Accession number :
- edsair.doi.dedup.....d819fc85f2f886b60aab7991db296801