Graphitization of 13C enriched fine-grained graphitic material under high-pressure annealing. (January 2019)

• Record Type: Journal Article
• Authors: Fedoseeva, Yu.V.; Okotrub, A.V.; Koroteev, V.O.; Borzdov, Yu.M.; Palyanov, Yu. N.; Shubin, Yu.V.; Maksimovskiy, E.A.; Makarova, A.A.; Münchgesang, W.; Bulusheva, L.G.; Vyalikh, A.
• Is Part Of: Carbon. Volume 141(2019)
• Page Start: 323
• Page End: 330
• Publication Date: 2019-01
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2018.09.065
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Hot pressing is one of the promising routes for graphitization of carbon materials. In the present work, high-pressure high-temperature behaviour of 13 C-enriched fine-grained graphitic material has been studied by using a set of experimental tools such as scanning electron microscopy, Raman scattering, X-ray diffraction, X-ray photoelectron and near-edge X-ray absorption fine structure spectroscopies, and solid-state nuclear magnetic resonance (NMR) spectroscopy. The material has been annealed at a temperature of 1200 or 1500 °C using a stabilizing pressure of 5 GPa. It shown, that addition of small amount of water during the annealing at 1200 °C results in a better local atomic ordering of carbon material and increases the hydrocarbon fraction. Well-ordered graphite crystals enriched with 13 C isotope are formed on the surface of nickel ampule at 1500 °C. An increase in processing time from 2 to 15 h decreases the defect density and improves the graphitization level of the material. Graphical abstract: Image 1