초록 ▼

A method of producing a large-sized body of a ceramic honeycomb structure, comprising the steps of integrating unfired unit blocks each having a prismatic shape and a honeycomb structure with axial gas passages into a large-sized body by bonding the unit blocks to one another with a bonding agent an

A method of producing a large-sized body of a ceramic honeycomb structure, comprising the steps of integrating unfired unit blocks each having a prismatic shape and a honeycomb structure with axial gas passages into a large-sized body by bonding the unit blocks to one another with a bonding agent and firing this body. The unit blocks are formed of a ceramic composition consisting of a powdered ceramic material and completely gasifiable substances, and essential components of the bonding agent are also completely gasifiable substances such as a combination of an organic binder material used in the ceramic composition and a solvent for this binder material. The gasifiable substances present in the large-sized body are completely dissipated by heating before the occurrence of sintering of the ceramic material by firing, so that the fired product is a wholly and homogeneously ceramic body of a honeycomb structure highly resistant to thermal shocks.

대표청구항 ▼

A method of producing a large-sized body of a ceramic honeycomb structure, comprising the steps of: integrating a plurality of unit blocks each having a prismatic shape and a honeycomb structure providing a number of continuous and axially extending gas passages into a large-sized body of a desired

A method of producing a large-sized body of a ceramic honeycomb structure, comprising the steps of: integrating a plurality of unit blocks each having a prismatic shape and a honeycomb structure providing a number of continuous and axially extending gas passages into a large-sized body of a desired shape by bonding said unit blocks to one another with a bonding agent, said unit blocks being formed by extrusion molding of a ceramic composition comprising a powdered ceramic material, an organic binder material, which can be entirely converted into gaseous substances and dissipated by firing, and a solvent for said binder material and thereafter dried with resultant evaporation of said solvent, said bonding agent comprising only two essential components one of which is said organic binder material and the other is a liquid which serves as a solvent for said binder material; drying said large-sized body so as to evaporate said liquid in said bonding agent; heating the dried large-sized body to a first temperature so as to gasify and dissipate said binder material; and firing the heated large-sized body at a second temperature higher than said first temperature so as to cause sintering of said ceramic material constituting the integrated unit blocks thereby to convert the large-sized body into an entirely and homogeneously ceramic honeycomb structure body.