Patent ID: 8747710

Claim:
A method for producing a porous body that forms an expandable slurry containing at least inorganic powder, a foaming agent, and a binder into a sheet, causing the expandable slurry sheet to be foamed and baked, and thereby producing the porous body, the method comprising the steps of: deaerating a powdered slurry that contains the inorganic powder and the binder; preparing an expandable slurry by mixing the dearated powdered slurry and the forming agent; and incorporating gas bubbles into the deaerated powdered slurry, wherein the expandable slurry is hermetically sealed until the expandable slurry is formed into a sheet in order to prevent unexpected gasses from incorporating into the expandable slurry, thereby controlling a porosity of the porous body with a higher level of precision after preparing the expandable slurry from the inorganic powder, the foaming agent, and the binder.