Patent ID: 9334195
Filing Date: 2016-05-10
CPC Classification: B28B,C04B,Y10T

Claim Text:
1. A method for manufacturing a dual structure cellular ceramic object, comprising the steps of: forming a fluid dispersion comprising a ceramic precursor and a chain-growth or step-growth organic polymer precursor in a solvent; placing said fluid dispersion in a semi-rigid mold or flexible mold or extruding said fluid dispersion through a die to form a shaped object; holding said second temperature for a period of time, wherein a sintered dual structure cellular ceramic object is formed, said ceramic object comprising a dense surface layer over at least a portion of said cellular ceramic object adjacent to a porous ceramic structure, wherein said dense surface layer over at least a portion of said cellular ceramic object formed where contact occurred between said shaped object with said semi-rigid mold or flexible mold or said die; and cooling said cellular ceramic object to room temperature at a third rate.