Improvement of Mullite and Magnesia-Based Refractory Castables Through Addition of Nano-Spinel Powder.

Autor:	Khalil, Nagy M., Wahsh, Mohamed M. S., Ewais, Emad M. M., Hassan, Mohamed B., Mehrez, S. M.
Předmět:	MAGNESIUM oxide THERMAL analysis MICROSTRUCTURE X-ray diffraction DIFFERENTIAL thermal analysis SCANNING electron microscopes
Zdroj:	International Journal of Applied Ceramic Technology; Jul2013, Vol. 10 Issue 4, p655-670, 16p
Abstrakt:	Two different commercial refractory castables based on mullite or magnesia aggregates have been improved through addition of 0-25 wt.% nano-magnesium aluminate spinel ( MA) powder. Physico-mechanical and refractory properties were tested at different firing temperatures. The phase composition, thermal analysis, and microstructure of these refractory castables were detected using X-ray diffraction ( XRD), differential thermal analysis ( DTA), as well as scanning electron microscope ( SEM) attached with energy dispersive X-ray unit, respectively. The castable sample mix containing 10 wt.% nano- MA spinel powder was chosen as an optimum composition according to its good sintering, mechanical as well as refractory properties. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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