| 초록 |
Artificial graphites, which have been used in various application fields such as nuclear reactors, electrodes, and Li-ion batteries, are generally manufactured through a series of kneading, molding, carbonization and graphitization process. Herein, the effect of the viscosity of binder pitch in the kneading process on the mechanical property of resultant carbon block is investigated using coal-tar and petroleum pitch. The carbon blocks were prepared by hot-press molding, and their mechanical properties were discussed in terms of density and compressive strength. Coal-tar pitch showed more aromatic structure, higher carbonization yield, and lower viscosity than petroleum pitch with similar SP. The viscosity changes of both coal-tar and petroleum pitch with increasing kneading temperature played an important role in the mechanical strength of the final carbon block. The optimum kneading temperature was found to be 60 ˚C higher than SP of the binder pitches used. |
