Journal of Materials Science

, Volume 18, Issue 9, pp 2811–2816 | Cite as

Synthesis of iron-dispersed carbons by pressure pyrolysis of divinylbenzene-vinylferrocene copolymer

  • Shin-Ichi Hirano
  • Toshinobu Yogo
  • Hirohiko Suzuki
  • Shigeharu Naka
Papers

Abstract

Versatile carbons with finely dispersed iron were synthesized by pressure pyrolysis of a copolymer prepared from divinylbenzene and vinylferrocene at temperatures below 680‡ C and pressures of 125 MPa. The pyrolysis conditions of the copolymer were found to influence the final morphology of carbons to give fibrils, spheres and polyhedra. The resulting carbons contained uniformly fine particles of cementite (Fe3C) which were less than 30 nm in size, whereas the magnetite was dispersed in the carbon matrix by pressure pyrolysis in the presence of water. Highly dispersed cementite in carbon was found to decompose into metallic iron by further heat treatment above 850‡ C. Porous spherulitic carbons were also synthesized by heat treatment of magnetite containing carbon spherulites.

Keywords

Iron Polymer Heat Treatment Pyrolysis Magnetite 

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Copyright information

© Chapman and Hall Ltd. 1983

Authors and Affiliations

  • Shin-Ichi Hirano
    • 1
  • Toshinobu Yogo
    • 1
  • Hirohiko Suzuki
    • 1
  • Shigeharu Naka
    • 1
  1. 1.Synthetic Crystal Research Laboratory, Faculty of EngineeringNagoya UniversityNagoyaJapan

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