C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 35/00 (2006.01) C04B 35/10 (2006.01) C04B 35/14 (2006.01) C04B 35/46 (2006.01) C04B 35/622 (2006.01) D01F 9/08 (2006.01)
Patent
CA 2138595
The invention relates to a refractory thermally-insulating component consisting essentially of refractory ceramic fibers which are mechanically combined with one another, the composition of which comprises at least 97.5% by weight of alumina, silica and zirconia in total, wherein: a) no organic or inorganic binder binds the fibers to one another; b) the fibers have the following chemical composition, as % by weight: Al2O3 : 33-45% SiO2 : 41-53 % ZrO2 : 5.5-17% MgO : 0.02-2% other oxides: < 0.50% with Fe2O3 + TiO2 ? 0.20% and Na2O + CaO + K2O ? 0.30%; c) the said fibers homogeneously have, throughout the entire body of the component, a degree of crystallinity of not less than 30% and not more than 64%, the crystals present being essentially formed of mullite crystals and of quadratic zirconia; and d) the said component has a linear shrinkage of no more than 3% after being held for 24 hours at 1450°C.
Recasens Joseph
Urffer Daniel
Bereskin & Parr
Carborundum France
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