HONEYCOMB CERAMIC SUBSTRATES, HONEYCOMB EXTRUSION DIES, AND METHODS OF MAKING HONEYCOMB CERAMIC SUBSTRATES

摘要

A honeycomb ceramic substrate (102), a method of making thereof, and a honeycomb extrusion die (408) configured to extrude a honeycomb ceramic substrate (102) from a batch of ceramic or ceramic-forming material is provided. The substrate (102) may include a lattice of intersecting walls (110) defining a honeycomb network of flow channels (108) extending between an inlet end (104) and an outlet end (106) of the honeycomb substrate (102). Each flow channel (108) may be defined by a plurality of channel walls (110) of the intersecting walls with at least two of the plurality of channel walls (110) including concave inner surfaces (116) facing a center (125) of the corresponding flow channel (108) from central portions of the concave inner surfaces (116) to concave corner portions facing the center (125) of the corresponding flow channel (108).