Patent ID: 6015517
Filing Date: 2000-01-18
Classification: B22F,C04B

Abstract:
A method for controlling porosity in a gas permeable material comprising:providing a refractory material slurry;selecting a fugitive phase material having a volume percentage of said refractory material slurry, wherein said fugitive phase material can be removed during thermal processing;combining said fugitive phase material with said slurry;processing the combined slurry into a resultant refractory body;heating for a period of time to thermally remove a portion of said fugitive phase material, less than said volume percentage, from said refractory body; and,discontinuing said heating of said resultant refractory body such that a remaining portion of said fugitive phase material remains, to form a contiguous porous network with porosity approximately equal to the volume percentage of the removed portion of said fugitive phase material.