The present invention discloses a carbon / carbon curved
honeycomb structure, a mold for preparing the structure, and a method for preparing the structure. The curved surfaces of the inner and outer surfaces of the curved
honeycomb are two coaxial cylindrical surfaces. The curved
honeycomb comprises a plurality of first and second single
cell rings arranged alternately in the axial direction and connected in a
mating manner. The first single
cell ring comprises a plurality of first single cells connected in sequence in a
mating manner, and the second single
cell ring comprises a plurality of second single cells connected in sequence in a
mating manner. The shape of the first single cell is the same as the
solid shape formed by the intersection of a regular
hexagonal pyramid, an inner cylindrical surface, and an outer cylindrical surface. The axis of the regular
hexagonal pyramid is perpendicular to the axis of the inner cylindrical surface, the vertex of the regular
hexagonal pyramid is on the axis of the inner cylindrical surface, and two pairs of sides of the base of the regular hexagonal
pyramid are parallel to the axis of the inner cylindrical surface. The inner surface holes of the second single cells are hexagonal, identical in shape and size to the inner surface holes of the first single cells. The present invention simplifies the preparation process, saves labor time, and is suitable for the preparation of large-scale and batch carbon / carbon curved honeycombs.