A new and economic approach to synthesize andfabricate anorthite based ceramics using kaolin andCaCO3

Type : Article de conférence
Auteur(s) :  Soumia Zaiou, Ismahan. Serradj, Abdelhamid. Harabi
Année :  2016
Domaine : Sciences des matériaux
Conférence: 7th African Conference on Non Destructive Testing (ACNDT) & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Lieu de la conférence:  Oran, Algeria
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  anorthite, Kaolin, calcite, Sintering, Vickers micro-hardness, tensile strength.

Résumé : 

This new and economic approach to fabricateresistant anorthite based ceramics consists of Algerian kaolinand calcite (CaCO3). The anorthite (CaO·Al2O3E-Mail :zaiou_21 @yahoo.fr·2SiO) basedceramics were obtained by solid state reaction. The startingpowders were sintered at different temperatures (800-1100°C) for 1 h. The optimum sintering conditions gave arelatively higher density (2.64 g/cm3). Different techniqueswere used to investigate the physical proprieties of theprepared anorthite such as: scanning electron microscopy, Xraydiffraction, Raman spectroscopy and tensile strength. Thebest obtained 3 points flexural strength value was about 202MPa for the samples sintered at 1000 °C for 1 h. Furthermore,the best value of Vickers micro-hardness of the samplessintered at 1000 °C was 7.1 GPa. Finally, a correlationbetween microstructure and mechanical properties ofelaborated supports has been discussed.