초록 ▼

Disclosed herein are an integrated carbon article of a large size having a bulk density of more than 1.01 g/cm3, comprising pieces of carbonaceous material(s) of the same or different quality and flexible graphite sheet(s) produced by interposing the flexible graphite sheet(s) between each of the pi

Disclosed herein are an integrated carbon article of a large size having a bulk density of more than 1.01 g/cm3, comprising pieces of carbonaceous material(s) of the same or different quality and flexible graphite sheet(s) produced by interposing the flexible graphite sheet(s) between each of the pieces of carbonaceous material(s), bonding each of the pieces of carbonaceous material(s) and the flexible graphite sheet(s) with an adhesive agent and calcining the thus bonded material at a temperature of not lower than 800°C.

대표청구항 ▼

A process for producing an integrated carbon article of a large size, said article having (i) a bulk density of more than 1.01 g/cm3, and (ii) a longest side of a length of at least 100 mm, said process comprising the steps of: (1) interposing a flexible graphite sheet between pieces of carbonaceous

A process for producing an integrated carbon article of a large size, said article having (i) a bulk density of more than 1.01 g/cm3, and (ii) a longest side of a length of at least 100 mm, said process comprising the steps of: (1) interposing a flexible graphite sheet between pieces of carbonaceous material of the same or different quality, said flexible graphite sheet having a thickness of not more than 1 mm, a bulk density of 1.0 to 1.5 g/cm3, a distortion rate of not more than 0.35×10-2 cm2/kg under a compression load of 1 kg/cm2 and a flexibility such that said flexible graphite sheet does not break when bent to a radius of curvature of 10 mm, (2) bonding the pieces of carbonaceous material and the flexible graphite sheet(s) with an adhesive agent, and (3) calcining the thus bonded material at a temperature of at least 800°C. so that the integrated carbon article is obtained, the linear contraction rate in the case of calcining the bonded pieces of carbonaceous material at 2000°C. being not more than 3%, each of said pieces of carbonaceous material being selected from the group consisting of (a) pieces of carbonaceous starting material produced by molding a mixture of a carbon aggregate calcined at a temperature of at least 800°C. and a binder, which pieces of carbonaceous material have a bulk density of at least 1.01 g/cm3 after calcination thereof at a temperature of at least 800°C., (b) pieces of carbon material produced by molding a mixture of a carbon aggregate and a binder so that a molded material is formed and calcining the molded material at a temperature of at least 800°C., which pieces of carbon material have a bulk density of at least 1.3 g/cm3, and (c) graphitic material produced by molding a mixture of an aggregate of graphite articles and/or easily graphitizable carbon particles and a binder so that a molded material is formed and calcining the molded material at a temperature of at least 2000°C., which graphitic material has a bulk density of at least 1.5 g/cm3.