Technological properties of raw clay based ceramic tiles: Influence of talc
- DOAJ (DOAJ: Directory of Open Access Journals) , 15 : 231-238
Résumé
Local clay from Burkina Faso has been used as a basic raw material in the formulation of ceramic tile with a natural talc (0 - 4% wt) as a flux. The used sintering temperatures are between 950 and 1100 °C with one hour as hold at heating rate of 5 °C∙min-1. The different technological properties (shrinkage, water absorption and mechanical strength) are improved when the sintering temperature exceeds 1000 °C. The mixture with 4% wt of talc provides better properties than the other grades. The tiles obtained at 1050 °C with 4% wt of talc have similar characteristics to those obtained at 1100 °C without talc. An energy gain with a difference of temperature of 50 °C could be made with the use of talc as the adjuvant.
Mots-clés
Talc, Raw material, Ceramic, Ceramic tiles, Clay minerals, Materials science, Mineralogy, Metallurgy, Geology, Chemistry