The invention belongs to the technical fields of a
silicon carbide ceramic material and a preparation method thereof, in particular relates to a
silicon carbide ceramic tubular product with high strength, high
thermal conduction, low expansion, high thermal-
shock resistance performance and controllable external dimensions and a preparation method thereof. The
silicon carbide ceramic tubes have even texture and uniform tubular wall thickness; the thickness of each tubular wall can be controlled from 0.5 mm to 20 mm, each tubular outer
diameter can be from 5 mm to 100 mm, the
silicon carbide ceramic tube with the longest length is limited by a
sintering furnace, and each tubular wall can be in a compact structure or a micropore structure. The
silicon carbide ceramic tubular product uses organic resin and SiC
powder as main raw materials and utilizes an
extrusion molding technology to prepare a tubular precast blank which is compacted and equalized at a high temperature, pyrolysed to form a final product after reaction, infiltration and
sintering. The
silicon carbide ceramic tubular product has the fundamental characteristics of SiC ceramics, such as high strength, low
thermal expansion coefficient, high
thermal conduction,
chemical corrosion resistance,
oxidation resistance, good high temperature stability, strong thermal-
shock resistance performance, and the like. The preparation method has simple technology, convenient operation, no complicated equipment and low manufacture cost.