Graphitization of 13C enriched fine-grained graphitic material under high-pressure annealing

Yu V. Fedoseeva, A. V. Okotrub, V. O. Koroteev, Yu M. Borzdov, Yu N. Palyanov, Yu V. Shubin, E. A. Maksimovskiy, A. A. Makarova, W. Münchgesang, L. G. Bulusheva, A. Vyalikh

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Hot pressing is one of the promising routes for graphitization of carbon materials. In the present work, high-pressure high-temperature behaviour of 13C-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 13C 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.

Original languageEnglish
Pages (from-to)323-330
Number of pages8
JournalCarbon
Volume141
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • DIAMOND CRYSTAL-GROWTH
  • RAMAN-SPECTROSCOPY
  • CARBON
  • TEMPERATURE
  • CRYSTALLIZATION
  • DISORDER
  • METHANE
  • FILMS
  • WATER

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