METHOD FOR MANUFACTURING ALUMINUM-TITANATE-BASED CERAMIC HONEYCOMB STRUCTURE

摘要

A method for manufacturing a ceramic honeycomb structure includes kneading titania particles, alumina particles and binder such that raw material paste including the titania particles, the alumina particles and the binder is prepared, extruding the raw material paste through a die for forming a honeycomb structure such that a body made of the raw material paste and having the honeycomb structure is formed, supporting the body extruded from the die on a holder while moving the holder along extrusion direction at a moving speed relative to an extruding speed of the raw material based on a target diameter size set for the body such that the diameter of the body held by the holder changes to the target diameter size, and sintering the body having the honeycomb structure with the target diameter size such that a ceramic body having the honeycomb structure with the target diameter size is formed.

主权项

1. A method for manufacturing a ceramic honeycomb structure, comprising:
kneading titania particles, alumina particles and a binder such that a raw material paste comprising the titania particles, the alumina particles and the binder is prepared; extruding the raw material paste through a die for forming a honeycomb structure such that a body comprising the raw material paste and having the honeycomb structure is formed; supporting the body extruded from the die on a holder while moving the holder along an extrusion direction at a moving speed relative to an extruding speed of the raw material based on a target diameter size set for the body such that a diameter of the body held by the holder changes to the target diameter size; and sintering the body having the honeycomb structure with the target diameter size such that a ceramic body having the honeycomb structure with the target diameter size is formed, wherein the moving speed is less than the extruding speed such that the body extruded from the die is reduced in length with respect to a longitudinal direction of the honeycomb structure due to compression exerted by the holder, that the diameter of the body extruded from the die is increased to the target diameter size and that a thickness of a partition wall portion of the honeycomb structure is increased.