Patent ID: 9028741
Filing Date: 2015-05-12
Classification: C04B

Abstract:
1. A method for manufacturing a ceramic honeycomb structure, comprising: kneading titania particles, alumina particles and a binder ingredient such that a raw material paste comprising the titania particles, the alumina particles and the binder ingredient is prepared; forming a body comprising the raw material paste and having a honeycomb structure such that the body has the honeycomb structure having a plurality of through-holes extending in a longitudinal direction of the body and a plurality of partition portions formed between the through-holes; applying a sealant composition comprising aluminum hydroxide particles, talc particles, kaolin particles, water and an organic binder to one end of each of the through-holes of the body in the longitudinal direction such that the honeycomb structure of the body has each of the through-holes sealed at the one end; and sintering the body comprising the raw material paste and having the honeycomb structure sealed by the sealant composition such that a ceramic body having the honeycomb structure and comprising aluminum titanate is formed and that the sealant composition forms a sealant comprising cordierite in each of the through-holes at the one end, wherein the sealant composition has a weight ratio of the aluminum hydroxide particles, talc particles and kaolin particles such that a ratio of aluminum hydroxide particles/talc particles is in a range of 0.2˜0.3, a ratio of talc particles/kaolin particles is in a range of 1.0˜1.5 and a ratio of aluminum hydroxide particles/kaolin particles is in a range of 0.25˜0.36, and the sealant composition is free from fiber.