Porous ceramic matrix
AssigneeNational University of Singapore
InventorsLiang Hong, Xinwei Chen
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Abstract
A porous ceramic matrix contains a plurality of ceramic particles adhered to each other, and a plurality of channels defined by surfaces of neighboring ceramic particles, the channels each having an average diameter of 0.5-2.5 μm. Preferred ceramics also have a porosity of 25.0-40.0%, a Darcy's Permeability of 1.57-34.8×10−14 m2, and a mechanical strength of 25-64 MPa. Also disclosed is a method of preparing such a porous ceramic matrix, comprising providing a pellet containing ceramic particles that are coated with a monomer, a catalyst, and a binder; polymerizing the monomer in the solid state by heating, then carbonizing and sintering the pellet.
Claims23
A porous ceramic matrix, the matrix comprising a plurality of ceramic particles adhered to each other, and a plurality of channels defined by surfaces of neighboring ceramic particles, the channels each having an average diameter of 0.5-2.5 μm, wherein the matrix features a porosity of 25.0-40.0%, a Darcy's permeability of 1.57-34.8×10−14 m2, and a mechanical strength of 25-64 MPa, wherein the channels include narrow segments, each of the narrow segments having a diameter smaller than 100 nm.
A method for preparing a porous ceramic matrix, the method comprising:
- providing a ceramic pellet containing ceramic particles that are coated with a monomer, a catalyst, and a binder;
- polymerizing the monomer in solid state by heating to form a polymer embedded in the ceramic pellets;
- carbonizing the polymer, catalyst and binder to generate a porous ceramic pellet;
- and
- sintering the porous ceramic pellet to form a porous ceramic matrix;
- wherein the monomer is 1-10% by weight, the catalyst is 1-5% by weight, and the binder is 1-20% by weight of the ceramic particles.
Dependencies are inferred from the claim text.