| abstract |
A honeycomb structural body, comprising a ceramic block having a large number of through-holes longitudinally arranged parallel with each other through wall parts and sealed at one end parts thereof, wherein the ceramic block is formed of a composite material having ceramic particles and crystalline silicon with excellent heat conductivity, whereby not only an excellent thermal diffusivity can be provided but also an extremely less accumulation of thermal stress can be provided even if a temperature distribution at rather low temperatures is produced or a long-term cold heat cycle is repeated and, therefore, since cracking is not produced, an excellent thermal shock resistance can be provided. |