NGK Insulators

A honeycomb structure (10) comprises a plurality of flow channels (2,12) through which a fluid flows; a substrate (8) that comprises a first flow channel (2) of which outlet end surface is sealed and a second flow channel (12) of which inlet end surface is sealed; and a catalyst (20) that is inserted in at least one of the first and second flow channels (2,12). The catalyst is removably filled into the flow channels and may be provided in rod-shaped or pellet-shaped form with catalytic function by e.g. precious metal supported on a ceramic carrier.

A ceramic body according to this invention contains: a plurality of ceramic particles 1 including one or more selected from silicon carbide, silicon nitride, and aluminum nitride; a silicon phase 2 existing between the plurality of ceramic particles 1 and having a dopant dissolved in solid solution therein; and a plurality of dopant particles 3 existing in the silicon phase 2 and containing the dopant. The dopant is a Group 13 element or a Group 15. A content of the silicon phase 2 in the ceramic body is 20 to 80 % by mass. A porosity of the ceramic body is 30% or less.

An evaporator includes: a cylindrical member 10 through which a heating medium can flow; a heat exchange structure provided on a radially inner side of the cylindrical member 10; and a jacket member 30 provided on a radially outer side of the cylindrical member 10 with a space so as to define a flow path for a liquid and a vapor thereof, the jacket member 30 having a feed port 31 for a liquid M1 and a discharge port 32 for a vapor.

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