Binderless Carbon/Graphite Materials

High performance binderless carbon bodies can be mamufactured from the mesophase raw material derived from petroleum pitch, which is ground into fine powders less than 10μm, and directly moulded, then sintered at 1000℃ without any kind of binder. The sintered bodies have a bulk density of 1.69 g/cm3, bending strength of 91.2 MPa. Shore hardness of 100. Porosity of only 7.2%. and electrical resistivity of 60x10-6 m. The bodies graphitized at 2800℃ have a bulk density of 1.88 g/cm3, bending Strength of 82 MPa. Shore hardness of 85, porosityof 5.4%, and electrical resistivity Of 12x10-6 nm. The scanning electron micrographs of thesection show that the bodies possess an extremely dense and homogeneous structure. lnfra-redspectrum analysis shows that carbonyls introduced when ground or activated are one of the keyfactors determining the selfbinding and self sintering properties of the mesophase fine powders,and the Structure and strength of the sintered bodies.