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Journal of Materials Science

, Volume 42, Issue 14, pp 5448–5451 | Cite as

Fabrication of SiC by carbothermal-reduction reactions of diatomaceous earth

  • Branko MatovicEmail author
  • Aleksandra Saponjic
  • Aleksandar Devecerski
  • Miroslav Miljkovic
Article

Abstract

In this paper the possibility of using diatomaceous earth as Si precursor for low temperature synthesis of silicon carbide (SiC) by carbothermal-reduction reactions was studied. A diatomaceous earth of Serbian origin and carbon black as reducing agent were used. The green bodies with constant C/SiO2 ratio (C/Si = 4) were heated at temperatures between 1,250 °C and 1,550 °C with controlled Ar flow atmosphere. Phase evolution was followed as a function of annealing time and sintering temperature. It was found that reaction proceeded via many intermediate phases. The comparatively low reaction temperature is attributed to the nano-porous nature of the raw material. By means of XRD and SEM investigations powders have been characterized. The results show that diatomaceous earth can be very effective source for obtaining of silicon carbide powders.

Keywords

Diatomaceous Earth Carbothermal Reduction Average Crystalline Size Iron Silicide Silicon Carbide Powder 

Notes

Acknowledgement

The authors are grateful to Ministry of Science and Environmental Protection of Serbia for financial support.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Branko Matovic
    • 1
    Email author
  • Aleksandra Saponjic
    • 1
  • Aleksandar Devecerski
    • 1
  • Miroslav Miljkovic
    • 1
  1. 1.Materials Science – Lab. 170Institute of nuclear sciences – VincaBelgradeSerbia

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