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Improvement of Mullite and Magnesia‐Based Refractory Castables Through Addition of Nano‐Spinel Powder
Author(s) -
Khalil Nagy M.,
Wahsh Mohamed M. S.,
Ewais Emad M. M.,
Hassan Mohamed B.,
Mehrez S. M.
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2012.02762.x
Subject(s) - mullite , materials science , spinel , scanning electron microscope , microstructure , sintering , refractory (planetary science) , differential thermal analysis , magnesium , metallurgy , nano , aluminate , phase (matter) , calcination , composite material , ceramic , diffraction , cement , chemistry , biochemistry , physics , optics , catalysis , organic chemistry
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.