Carbon fibers and process for their production.

摘要

A carbon fiber having a fiber diameter of at least 15 mu m, a tensile modulus of elasticity of more than 104 ton/mm<2> and a spread L of graphite crystallites in the direction of axis a of at least 1,000 ANGSTROM as determined from the powder X-ray spectrum. Figure 1 shows diagrammatical views of cross-sections of carbon fibers having various tissue structures wherein the respective center portions underwent melting and carbonization. <IMAGE>