열처리를 통해 휘발분이 제어된 콜타르 피치를 이용한 C/C 복합체 제조

Preparation of C / C composites using coal tar pitch with volatile content controlled by heat treatment

C/C composites are lighter than metals and have excellent heat and electrical conductivity, and in order to maintain excellent physical properties even in harsh environments, various fields such as semiconductors, automobiles, rockets, nuclear power, EDM, mechanical seals, etc. and a certain importance is emerging. The high-density carbon block can be distinguished into a unidimensional system and a binary system according to the type of raw material. A system is a substance that requires a binder. In this study, a commercial coal tar pitch was heat-treated at a ramping rate of 2 to 10°C /min and 410 to 490°C to control the volatile content, β -resin content, molecttlar weight and etc. for production of semi-cokes. After that, the β-resin content of the heat-treated pitch was measured, and changes in the fixed carbon and volatile contents were investigated via proximate analysis (PA) and thermogravimetric analysis (TGA). Then, MALDI-TOF I MS was measured in order to grasp the change in the molecular weight of the pitch depending on the rate of temperature rise. In addition, in order to understand the types of molecules generated in the heat treatment process of pitch, pyrolysis gas chromatography/mass spectroscopy (Py-GC/MS) was analyzed, and the reaction mechanism of pitch generated in the heat treatment process was understood.