Highly porous ceramics fabricated from preceramic polymer and expandable microspheres, and method for fabricating the same
First Claim
1. A method for fabricating a highly porous ceramic from expandable microspheres and a preceramic polymer, comprising the steps of:
- homogeneously mixing a preceramic polymer powder, expandable hollow microspheres and a ceramic powder, and molding the mixture to form a molded body;
heating the molded body to expand it;
curing the expanded molded body; and
pyrolyzing the cured molded body.
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Accused Products
Abstract
Disclosed herein are a highly porous ceramic having a high porosity of not less than 60% and a pore density of not less than 108 pores/cm3 fabricated from expandable microspheres and a preceramic polymer, and a method for fabricating highly porous ceramic. The method for fabricating highly porous ceramic from expandable microspheres and a preceramic polymer comprises the steps of: homogeneously mixing a preceramic polymer powder and expandable hollow microspheres, if necessary, a ceramic powder, and molding the mixture to form a molded body; heating the molded body to expand it; curing the expanded molded body; and pyrolyzing the cured molded body. Since the highly porous ceramic has a higher porosity and pore density than conventional porous ceramics, it can be suitably used for various high temperature structure materials, kiln furniture, bulletproof materials, shock-absorbing materials, insulating materials, refractory materials, lightweight structure materials, etc.
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Citations
16 Claims
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1. A method for fabricating a highly porous ceramic from expandable microspheres and a preceramic polymer, comprising the steps of:
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homogeneously mixing a preceramic polymer powder, expandable hollow microspheres and a ceramic powder, and molding the mixture to form a molded body;
heating the molded body to expand it;
curing the expanded molded body; and
pyrolyzing the cured molded body. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10)
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4. A method for fabricating a highly porous ceramic from expandable microspheres and a preceramic polymer, comprising the steps of:
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homogeneously mixing a preceramic polymer powder and expandable hollow microspheres, and molding the mixture to form a molded body;
heating the molded body to expand it;
curing the expanded molded body; and
pyrolyzing the cured molded body. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification