Patent ID: 8906339

Claim:
A high modulus graphitized carbon fiber, comprising the product fabricated by the following steps: subjecting a pre-oxidized carbon fiber with a microwave assisted graphitization process, wherein the pre-oxidized carbon fiber is heated to a graphitization temperature of 1000-3000° C. for 1-30 min, wherein the high modulus graphitized carbon fiber has a graphite sheet, and a crystalline stacking size Lc of the graphite sheet and a crystalline planar size La of the graphite sheet are defined by the following equations: 19 Å<Lc<70 Å, 35 Å<La<60 Å, and (Lc-19)≧2.5(La-40), and wherein the high modulus graphitized carbon fiber has a tensile strength of between 2.0-6.5 GPa and a modulus of between 200-650 GPa.