Water-based ceramic foams showing improved gel strength
AssigneeDow Global Technologies LLC
InventorsPeter C. LeBaron, Thomas M. Paquette
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Abstract
A method of preparing a gelled ceramic-based foam comprising forming a slurry comprising at least water, a ceramic, albumin and an aldehyde, such that the ratio of the aldehyde to the albumin is from about 60:1 to about 200:1, and frothing the slurry, such that the albumin polymerizes to form a gelled ceramic-based foam. The foam shows improved capability to resist collapse during any subsequent handling, drying to greenware, or firing steps. This enables simplified and more economical production of highly porous ceramics.
Claims19
A method of preparing a gelled ceramic-based foam comprising forming a slurry comprising at least water, an albumin, a ceramic, and an aldehyde, such that the weight:weight ratio of the aldehyde to the albumin is from about 60:1 to about 200:1, and frothing the slurry, such that the albumin polymerizes to form a gelled ceramic-based foam.
A method of preparing a ceramic-based greenware article comprising forming a slurry comprising water, a ceramic, an albumin and an aldehyde, such that the weight:weight ratio of the aldehyde to the albumin is from about 60:1 to about 200:1;
- frothing the slurry, such that the albumin polymerizes to form a gelled ceramic-based foam;
- and drying the foam to form a ceramic-based greenware article.
A ceramic-based gelled foam composition comprising water, a ceramic, a polymerized albumin and an aldehyde, wherein the ceramic-based gelled foam having a porosity ranging from about 60 percent by volume to about 95 percent by volume.
Dependencies are inferred from the claim text.