Porous article and method of manufacturing the same
AssigneeCorning Incorporated
InventorsMonika BACKHAUS-RICOULT, Boris Nikolayevich TSVETKOV
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Abstract
The present disclosure relates to porous ceramic articles and a method of making the same. The porous ceramic articles have a porosity (P) as a fraction in a range of about 0.3 to about 0.7; a permeability factor PQ>0.025, wherein PQ is (Kbulk)/(P·d502), Kbulk being bulk permeability in Darcy, and d50 being the mean pore size in micrometers (μm); a tortuosity in a range of about 1.8 to 3; and a median pore size diameter d50 in a range of about 10 μm to about 35 μm. The porous ceramic articles can have an interconnected bead microstructure comprising beads and bead connections, PQ is directly proportional to bead size, and wherein in a random cross section through the body, the beads appear as globular portions.
Claims25
A porous ceramic body, comprising:
- a porosity (P) as a fraction in a range of about 0.3 to about 0.7;
- a permeability factor PQ>0.025, wherein PQ is (Kbulk)/(P·d502), Kbulk being bulk permeability in Darcy, and d50 being the mean pore size in micrometers (μm);
- a tortuosity in a range of about 1.8 to 3;
- and
- a median pore size diameter d50 in a range of about 10 μm to about 25 μm.
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A porous body, comprising:
- a connected bead microstructure, comprising:
- beads, wherein in a random cross section through the body, the beads appear as globular portions;
- bead connections, wherein adjacent beads are connected by the bead connections;
- and
- a bead overlap of less than about 0.5, bead overlap being fraction of radial interference between adjacent connected beads,
- wherein the beads comprise a median bead diameter (Dbead) in a range of about 20 μm<Dbead≤50 μm, and
- a bead diameter distribution (Dbreadth) of less than 100 μm, Dbreath being ((D90−D10)/D50).
A porous body, comprising:
- a porosity (P) as a fraction in a range of about 0.3 to about 0.4;
- a permeability (K) greater than or equal to about 0.017·P·d502, where d50 is the mean pore size;
- a tortuosity in a range of about 2 to 5;
- and
- a median pore size diameter d50 as measured by mercury porosimetry in a range of about 10 μm to about 35 μm.
Dependencies are inferred from the claim text.