Method for producing carbonized or graphitized molding parts

A method for producing carbonized or graphitized moldings, comprising:

• producing a pourable homogenized polymeric mixture, consisting of polyacrylonitrile, dissolved in an organic solvent, which is admixed with carbon granules, pitch, carbon black, or graphite powder, and fibrous materials, cellulose, or starch until the mixture has a pourable consistency;
• homogenizing the mixture at room temperature, or at 160° C. if the mixture comprises pitch;
• pouring the pourable homogenized polymeric mixture into a casting mold;
• completely immersing the casting mold filled with the polymeric mixture in water for a defined period of time of several hours to days until the polymeric mixture in the casting mold has cured to form a prefabricated hardened molding and is dimensionally stable;
• subsequently breaking away the casting mold and stabilizing the prefabricated hardened molding by heating in a furnace in an air atmosphere to a stabilization temperature of 140° C. to 450° C. for stabilization and outgassing of volatile constituents from the molding;
• and
• carrying out a high-temperature treatment in order to carbonize at a constant temperature of 1000° C. or graphitize the molding at a constant temperature from 2000° C. in a furnace under protective gas or reduced pressure.