Patent ID: 7820278

Claim:
A refractory mortar cured material, formed by curing refractory mortar, applied on the surface or joint portions of a ceramic refractory base material, the refractory mortar cured material consisting of cordierite ceramic particles having an average particle size of 10 to 50 μm in an amount of 100 mass %, an organic binder in an amount of 0.1-0.2 mass %, silica sol in an amount of 30 mass %, and ceramic fibers in an amount of less than 5 mass %; wherein a difference between a 90% particle size and a 10% particle size of the cordierite ceramic particles is 10 to 60 μm, wherein an average pore size of the refractory mortar cured material is 5 to 25 μm, and wherein a width of a pore size distribution of the refractory mortar cured material is 20 to 80 μm.