Microstructure Peculiarities of Carbon Materials Based on Coal-Tar Pitch Hardened on the Surface of Thermally Expanded Graphite Flakes

作者：Dmitriev A V^*

来源：Solid Fuel Chemistry, 2013, 47(6): 365-369.

DOI：10.3103/S0361521913060025

The structure of self-caking artificial graphite based on coal-tar pitch hardened at 225, 275, and 450 C by oxidation with atmospheric oxygen on the surface of thermally expanded graphite (TEG) flakes was studied by scanning electron microscopy. In the course of the preparation of the material after hardening, the flakes covered with pitch were tightly compressed on grinding to molding powder in a ball mill and during the extrusion of laboratory workpieces in a rigid matrix to result in a laminar structure of the test materials. It was found that the caking capacity of TEG flakes and pitch layers decreased as the temperature of oxidation was increased. The thicknesses of pitch layers and TEG flakes were estimated based on the distance between the layers of the material.

• 出版日期2013-11