Synthesizing graphitic spheres using asphaltene-based materials by vacuum heat treatment
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This paper aimed at the high added value use of a deoiled asphaltene.Monodispersed highly graphitized graphitic spheres (GSs)with high thermal stability were synthesized by vacuum thermal processing followed chemical vapor deposition (CVD).The carbon microbeds and the synthesized GSs were compared by means of SEM,HRTEM,XRD and TGA.Vacuum thermal processed GSs are of high degree of graphitization and good thermal stability.The disordered structure of carbon microbeds were thermodynamically propelled to transit to the graphitic structure,forming the GSs.Keywords:
Thermal Stability
Asphaltene
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