Effect of hercynite spinel content on the properties of magnesia–calcium zirconate dense refractory composite

Hercynite spinel was added to magnesia–calcium zirconate refractory compositions in the range of 0–8wt%. Refractory specimens were obtained by solid state sintering at 1500°C in an electric furnace. The effect of different contents of spinel (FeAl2O4) as a microstructural elastifier in the refractor...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2015-09, Vol.35 (9), p.2631-2639
Main Authors: Rodríguez, E.A., Limones, A.K., Contreras, J.E., Ruiz-Valdés, J.J., Puente-Ornelas, Rodrigo, Arato, Ana María, Aguilar-Martínez, J.A.
Format: Article
Language:English
Subjects:
Hercynite
Mechanical properties
MgO–CaZrO3
Microstructure
Refractories
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Summary:Hercynite spinel was added to magnesia–calcium zirconate refractory compositions in the range of 0–8wt%. Refractory specimens were obtained by solid state sintering at 1500°C in an electric furnace. The effect of different contents of spinel (FeAl2O4) as a microstructural elastifier in the refractory matrix was studied. Refractory specimens were characterized by density, porosity, cold crushing strength, crystalline phase formation (XRD), microstructural analysis (SEM), and microhardness. Spinel (0.5wt%) containing a magnesia–calcium zirconate composition was found to have superior properties. The mechanical behaviour of the MgO–CaZrO3 was enhanced by c.a. 95% by the hercynite addition.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2015.03.018