Next Article in Journal
Formation of Au-Bearing Antigorite Serpentinites and Magnetite Ores at the Massif of Ophiolite Ultramafic Rocks: Thermodynamic Modeling
Next Article in Special Issue
Kaolinite-Magnesite or Kaolinite–Talc-Based Ceramics. Part II: Microstructure and the Final Properties Related Sintered Tapes
Previous Article in Journal
Colloidal and Thermal Behaviors of Some Venezuelan Kaolin Pastes for Therapeutic Applications
Open AccessArticle

Kaolinite-Magnesite Based Ceramics. Part I: Surface Charge and Rheological Properties Optimization of the Suspensions for the Processing of Cordierite-Mullite Tapes

1
Laboratoire de Traitement et Mise en Forme des Polymères, Faculté des Sciences, Université M’Hamed Bougara Boumerdes, Boumerdes 35000, Algerie
2
Institut de Recherche sur les Céramiques (IRCER, UMRCNRS 7315), ENSIL-ENSCI, Université de Limoges, CEC, 12 rue Atlantis, 87068 Limoges, France
3
Laboratoire Génie Physique des Hydrocarbures–Simulation et rhéologie des Fluides Complexes, Université M’Hamed Bougara Boumerdes, Boumerdes 35000, Algerie
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(12), 757; https://doi.org/10.3390/min9120757
Received: 28 October 2019 / Revised: 24 November 2019 / Accepted: 2 December 2019 / Published: 4 December 2019
(This article belongs to the Special Issue Prospecting, Processing and Evaluation of Mineral Raw Materials)
The present study aimed at investigating the influence of the concentration of sodium silicate and sodium hexametaphosphate on the dispersion of an aqueous kaolinitic clay slurry regarding further use for the tape casting process. The zeta potential of the kaolinitic clay slurry matched the requirements for tape casting. The addition of magnesite in the kaolinitic slurries tended to increase the zeta potential towards the required limit values. Despite this, the further addition of surfactants allowed improving the zeta potential in agreement with the tape casting conditions. Accordingly, the rheological behavior, under continuous and oscillatory flow conditions, of various mixtures of magnesite and a kaolinitic clay was studied. Regarding the pH and the zeta potential measurements, the E–F attraction prevailed at low pH value, and F–F or E–E attraction was predominant at high pH value. All slurries exhibited a shear thinning behavior, which was well-correlated by the Herschel–Bulkley model. It appeared that the best stability for the kaolinitic clay slurries was obtained while using 0.4 mass% and 1.2 mass% of sodium hexametaphosphate and sodium silicate, respectively. An increase in the magnesite concentration above 6 mass% led to a complex behavior with low cohesion energy due to the occurrence of soluble complexes. View Full-Text
Keywords: kaolinitic clay; magnesite; slurries; Na silicate; Na hexametaphosphate; rheology kaolinitic clay; magnesite; slurries; Na silicate; Na hexametaphosphate; rheology
Show Figures

Graphical abstract

MDPI and ACS Style

Hammas, A.; Lecomte-Nana, G.; Azril, N.; Daou, I.; Peyratout, C.; Zibouche, F. Kaolinite-Magnesite Based Ceramics. Part I: Surface Charge and Rheological Properties Optimization of the Suspensions for the Processing of Cordierite-Mullite Tapes. Minerals 2019, 9, 757. https://doi.org/10.3390/min9120757

AMA Style

Hammas A, Lecomte-Nana G, Azril N, Daou I, Peyratout C, Zibouche F. Kaolinite-Magnesite Based Ceramics. Part I: Surface Charge and Rheological Properties Optimization of the Suspensions for the Processing of Cordierite-Mullite Tapes. Minerals. 2019; 9(12):757. https://doi.org/10.3390/min9120757

Chicago/Turabian Style

Hammas, Aghiles; Lecomte-Nana, Gisèle; Azril, Nadjet; Daou, Imane; Peyratout, Claire; Zibouche, Fatima. 2019. "Kaolinite-Magnesite Based Ceramics. Part I: Surface Charge and Rheological Properties Optimization of the Suspensions for the Processing of Cordierite-Mullite Tapes" Minerals 9, no. 12: 757. https://doi.org/10.3390/min9120757

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop