Preparation and Properties of Graphite/Antimony Composites Based on Coal Tar Pitch

Abstract

Coal tar pitch is used as the raw material to prepare graphite/antimony composites, of which the mechanical performance, microstructure, element composition and tribological performance are investigated. Results indicate that the composite density, shore hardness, flexural strength, compression strength and porosity are 2.38g/cm 3 ,103.10Hs,91.65MPa,290.5MPa, and 0.65% respectively, representing physical property improvement of 17.65%-28.75%. In addition to C, the major composite elements are Sb, Si, Al and S, with relative amounts of 87.8%, 4.5%, 3.1% and 2.4%, respectively. Under experimental conditions, the average value friction coefficient is 0.120-0.158. The friction coefficient ranges from 0.08 to 0.149, when the load is 10-48MPa.the friction coefficient decreases gradually as the load increases. The average friction coefficient is equal to 0.141 and 0.114 when the rotating speed is equal to 200r/min and 500r/min, respectively; the friction coefficients declines gradually as rotating speed increases.

Study on the Formation Mechanism of a Core–Shell Structure during Graphitization of Anthracite

“…In recent years, the study of synthetic graphite and its applications has become a hot topic in the research field. , A range of carbon sources with high carbon content and fewer impurities, e.g., petroleum coke, coal tar pitch, anthracite, and bituminous coal, , were taken to prepare the synthetic graphite. Specifically, anthracite is one of the favorable resources for preparing synthetic graphite owing to its lower ash content and oxygen-containing functional groups. ,− Studies regarding coal-based synthetic graphite suggested that, with a lower rising rate of temperature and a higher final temperature, the obtained synthetic graphite tends to have a higher graphitization degree and perfect crystalline structure. , More importantly, the thermodynamics and kinetics of chemical reactions during the graphitization process of anthracite were investigated .…”

“…In recent years, the study of synthetic graphite and its applications has become a hot topic in the research field. 11 , 12 A range of carbon sources with high carbon content and fewer impurities, e.g., petroleum coke, 13 coal tar pitch, 14 anthracite, 15 and bituminous coal, 12 , 16 were taken to prepare the synthetic graphite. Specifically, anthracite is one of the favorable resources for preparing synthetic graphite owing to its lower ash content and oxygen-containing functional groups.…”