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Effect of Cr 2 O 3 on Slag Resistance of Al 2 O 3 –SiO 2 Refractories
Author(s) -
Chan ChenFeng,
Ko YungChao
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb05516.x
Subject(s) - materials science , calcination , slag (welding) , mullite , metallurgy , refractory (planetary science) , penetration (warfare) , chemistry , ceramic , catalysis , biochemistry , operations research , engineering
Refractory bodies of 65 wt% Al 2 O 3 were prepared from a mixture of calcined alumina and raw kaolin with the addition of Cr 2 O 3 up to 15 wt%. The Cr 2 O 3 addition effectively enhances slag resistance and reduces mullite formation. Petrographic analysis of the refractories after the slag test suggests that Cr 2 O 3 increases the viscosity of both the glassy phase in the refractory as well as the slag, thereby retarding slag penetration and reaction at elevated temperature.