Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Reexamination Certificate
2011-06-14
2011-06-14
Sample, David R (Department: 1783)
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
C264S631000, C264S681000, C264S666000, C055S523000, C428S304400
Reexamination Certificate
active
07960009
ABSTRACT:
A porous ceramic substrate includes a first phase of microcracked cordierite ceramic material and a second phase of non-cordierite metal oxide particles dispersed in the cordierite ceramic, wherein at least a portion of the interface between the first and second phases is wetted by glass and the particles of the second phase have a size in the range of from about 0.1 to about 10 μm. A method for toughening a porous microcracked cordierite ceramic includes the steps of providing a cordierite batch composition; adding to the cordierite batch composition at least one non-cordierite forming metal oxide or metal oxide precursor; mixing the batch composition with a pore former, binder, and water into a paste; shaping the paste into a green body; firing the green body; and annealing the fired green body at a temperature below the firing temperature to form a toughened cordierite ceramic honeycomb having a second phase of crystallized non-cordierite particles dispersed within the cordierite ceramic, wherein at least a portion of the interface between the first and second phases is wetted by glass.
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Backhaus-Ricoult Monika
Glose Christopher Raymond
Corning Incorporated
Douglas Walter M.
Gugliotta Nicole T
Sample David R
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