Formation of Anorthite Containing Cordierite Materials through Reaction Sintering Kaolin, MgO and CaO Precursors

  • Smail Lamara Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M’sila; Physics Department, Faculty of Science, University Mohamed Boudiaf of M’sila
  • Djaida Redaoui Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M’sila; Physics Department, Faculty of Science, University Mohamed Boudiaf of M’sila
  • Foudil Sahnoune Physics Department, Faculty of Science, University Mohamed Boudiaf of M’sila; Research Unit on Emerging Materials (RUEM), Ferhat Abbas of Setif 01
  • Menad Heraiz Physics and Chemistry of Materials Lab, Department of Physics, University Mohamed Boudiaf of M’sila; Physics Department, Faculty of Science, University Mohamed Boudiaf of M’sila
  • Nouari Saheb Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals

Abstract

The effect of CaO on cordierite formation from kaolin-MgO-CaO powder mixtures, milled for 5 h and reaction sintered for 2 h in the temperature range 900-1400 °C, was investigated. Phases formed in the developed materials were characterized by x-ray powder diffraction method (XRD) and Raman spectroscopy. Non-isothermal differential thermal analysis (DTA) and thermogravimetric (TG) experiments were performed from room temperature to 1400 °C, at heating rates from 20 to 40 °C/min. Activation energies were determined using Kissinger method. It was found that sintering the stoichiometric kaolin-magnesia mixture led to the nucleation and growth of monolithic cordierite; while cordierite along with anorthite were present in the other two samples where 4 or 8 wt% of CaO was added. The increase in CaO decreased cordierite formation temperature and increased the activation energy, which ranged from 445 to 619 kJ/mol for μ-cordierite and from 604 to 1335 kJ/mol for α-cordierite.

Published
2020-04-05
Section
Articles