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

2015; Elsevier BV; Volume: 35; Issue: 9 Linguagem: Inglês

10.1016/j.jeurceramsoc.2015.03.018

1873-619X

Edén A. Rodríguez, A.K. Limones, José Enciso Contreras, Juan Jacobo Ruíz Valdés, R. Puente-Ornelas, Ana María Arato, J.A. Aguilar-Martínez,

Recycling and utilization of industrial and municipal waste in materials production

Abstract Hercynite spinel was added to magnesia–calcium zirconate refractory compositions in the range of 0–8 wt%. 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 (0.5 wt%) 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.