Study on the properties of coal-based high-purity graphite

摘要

As one of the major value-added products of coal processing and utilization, coal pitch coke and coal tar pitch are used as raw materials to prepare high-purity graphite. The structure characteristics and properties were measured by experiments. The results show that the high-purity graphite has excellent physical properties: the skeletal density of 1.81-1.91 g/cm(3), the Shore hardness of 45.5-66.6 Hs, the flexural strength of 33.0-46.1 MPa, the compressive strength of 65.6-75.8 MPa, the ash content of 67-181 ppm, the thermal expansion coefficient of 3.71-4.11 X 10-6/degrees C, and the electrical resistivity of 8.72-12.13 mu Omega.m. Consequently, coal-based graphite materials have excellent properties and good application prospects in solar energy industry, which is an effective exploration for the transformation and upgrading of Chinese coal industry.