Patent ID: 8349124

Claim:
A method for manufacturing a honeycomb structure including a ceramic block, the method comprising: preparing a sealing material comprising: mixing inorganic fibers including at least one of an alkali metal compound, an alkaline earth metal compound and a boron compound, inorganic particles, and an organic binder to prepare a mixture; adding an alkaline oxide sol as oxide sol to the mixture to prepare an alkaline mixture; and mixing an acidic solution with the alkaline mixture, said acidic solution comprising at least one of sulfuric acid, phosphoric acid, lactic acid, acetic acid, and formic acid, wherein said sealing material has a pH of at least about 4 and at most about 6; providing a periphery sealing material paste layer including said sealing material on a peripheral face of the ceramic block; and drying and solidifying said sealing material to provide a peripheral sealing material layer.