Compositions: ceramic – Ceramic compositions – Refractory
Patent
1998-11-02
2000-03-28
Group, Karl
Compositions: ceramic
Ceramic compositions
Refractory
501 951, 501128, C04B 3580
Patent
active
060431733
ABSTRACT:
A method is now disclosed for the making of compressed refractory fiber shapes, e.g., compressed ceramic fiber shapes, having a textured surface and an aggregate body. The shapes can be obtained by molding and therefore may be simple or complex. For the process, small discrete fragments of refractory fiber in accumulated form are suspended in a colloidal dispersion, such as the colloidal dispersion provided by colloidal silica. Colloidal mixtures, as of colloidal silica with colloidal alumina are also most serviceable. The fragments and the dispersion are mildly mixed so as not to thoroughly disperse the fiber fragments, but rather to form globules of the fiber in the resulting blend. The resulting material is shaped, e.g., molded under pressure, and usually dried while under pressure, which drying can be at elevated temperature. Resulting shaped objects, in addition to a textured surface and an aggregate body can have excellent thermal insulation property, and desirable flexibility as well as tensile strength.
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Freer John J.
Global Consulting, Inc.
Group Karl
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