TITLE:
Composition and Refractory Properties of Mixtures of Moroccan Silica-Alumina Geomaterials and Alumina
AUTHORS:
Chaouki Sadik, Iz-Edinne El Amrani, Abderahman Albizane
KEYWORDS:
Clay; Silica-Alumina; Mullite Refractory; Mechanical Properties
JOURNAL NAME:
New Journal of Glass and Ceramics,
Vol.3 No.2,
April
30,
2013
ABSTRACT: Five mixtures (M1 to M5) of
silica-alumina geomaterials and two varieties of alumina (AP and AR)
were used for the elaboration of mullite refractory materials between 1500℃ and 1600℃. An X-ray diffraction (XRD) analysis showed that
the refractory samples are composed of mullite, corundum and silica. The length
of the mullite crystals was measured by a method of image analysis of
scanning electron microscopy (SEM). Chemical and mechanical properties of these
materials were investigated and correlated with their microstructure. Resistance towards Acid Attack test showed
that the refractory samples present good resistance, as well as, the alumina
powder AR obtained from waste of silica-alumina bricks proves to be
efficient for an eventual use.