Graphitic or carbonaceous moldings and processes for producing the same

A process for producing a carbonaceous composite molding comprising graphitic carbon and a carbonaceous or graphitic material derived from a mesophase-containing pitch, which comprises the four steps of:

• (1) suspending graphite powder in a tar containing a mesophase pitch precursor;
• (2) heating the resulting suspension system at 350.degree. to 550.degree. C. while blowing an inert gas thereinto or subjecting said system to reduced pressure thereby to obtain a carbonaceous precursor having mesophase pitch formed on the surface of graphite particles;
• (3) pressure molding said carbonaceous precursor at 400.degree. to 800.degree. C. into a green molding;
• (4) carbonizing or graphitizing said green molding in an inert atmosphere;
• and
• the mesophase-containing pitch having 30 to 80% by weight of quinoline insolubles, 40% or more of mesophase content, an upper limit of melting temperature of 400.degree. C. and a carbonization yield at 1,000.degree. C. of at least 70% by weight.

A process for producing a carbonaceous composite molding comprising graphitic carbon and a carbonaceous or graphitic material derived from a mesophase pitch, which comprises the three steps of:

• (1) suspending graphite powder in a tar containing a mesophase pitch precursor;
• (2) heating the resulting suspension at 350.degree. to 550.degree. C. while blowing an inert gas thereinto or subjecting said suspension to a reduced pressure thereby to obtain a carbonaceous precursor having mesophase pitch formed on the graphite particles;
• and
• (3) pressure molding said carbonaceous precursor at 800.degree. to 3,000.degree. C.;
• and
• the mesophase-containing pitch having 30 to 80% by weight of quinoline insolubles, 40% or more of mesophase content, an upper limit of melting temperature of 400.degree. C. and a carbonization yield at 1,000.degree. C. of at least 70% by weight.

A process for producing a carbonaceous composite molding comprising graphitic carbon and a carbonaceous or graphitic material derived from a mesophase-containing pitch, which comprises the four steps of:

• (1) suspending graphite powder in a tar containing a mesophase pitch precursor;
• (2) heating the resulting suspension system at 350.degree. to 550.degree. C. while blowing an inert gas thereinto or subjecting said system to reduced pressure thereby to obtain a carbonaceous precursor having mesophase pitch formed on the surface of graphite particles;
• (3) pressure molding said carbonaceous precursor at 400.degree. to 800.degree. C. into a green molding;
• (4) carbonizing or graphitizing said green molding in an inert atmosphere;
• and
• the mesophase-containing pitch containing 50 to 100% by weight of quinoline insolubles and having a 40% or more mesophase content, an upper limit of melting temperature of 400.degree. C., and a carbonization yield at 1,000.degree. C. of at least 70% by weight.

A process for producing a carbonaceous composite molding comprising graphitic carbon and a carbonaceous or graphitic material derived from a mesophase pitch, which comprises the three steps of:

• (1) suspending graphite powder in a tar containing a mesophase pitch precursor;
• (2) heating the resulting suspension at 350.degree. to 550.degree. C. while blowing an inert gas thereinto or subjecting said suspension to a reduced pressure thereby to obtain a carbonaceous precursor having mesophase pitch formed on the graphite particles;
• and
• (3) pressure molding said carbonaceous precursor at 800.degree. to 3,000.degree. C.;
• and
• the mesophase-containing pitch containing 50 to 100% by weight of quinoline insolubles and having a 40% or more mesophase content, an upper limit of melting temperature of 400.degree. C., and a carbonization yield at 1,000.degree. C. of at least 70% by weight.

A process for producing a carbonaceous or graphitic composite molding comprising a filler of at least one material in powder form selected from the group consisting of graphitic carbon, carbonaceous carbon, metals, metal compounds and other inorganic compounds qualified as a filler to a carbonaceous or graphitic molding derived from a mesophase-containing pitch, which comprises the four steps of:

• (1) suspending a filler comprising at least one material in powder form selected from the group consisting of graphitic carbon, carbonaceous carbon, metals, and metal compounds or other inorganic compounds qualified as a filler to a carbonaceous or graphitic molding in a tar containing a mesophase pitch precursor;
• (2) heating said suspension system to evaporate the light distillates contained in the tar by blowing of an inert gas into the suspension or by subjecting the suspension to a reduced pressure and subjecting said mesophase pitch precursor to heat treatment at 350.degree. to 500.degree. C. to obtain a carbonaceous precursor having a mesophase-containing pitch formed on the surface of said material;
• (3) molding said carbonaceous precursor into a green molding containing mesophase-containing pitch;
• and
• (4) providing said green molding for carbonization or graphitization reaction in an inert atmosphere to form a carbonaceous or graphitic composite;
• and
• the mesophase-containing pitch precursor contains 30 to 80% by weight of quinoline insolubles and in which the mesophase-containing pitch has a 40% or more mesophase content, an upper limit of melting temperature of 400.degree. C. and a carbonization yield at 1,000.degree. C. of at least 70% by weight.