Journal of Materials Science

, Volume 42, Issue 16, pp 6878–6886 | Cite as

Synthesis of beta silicon carbide powders from biomass gasification residue

  • Sergio Galvagno
  • Sabrina Portofino
  • Giovanni Casciaro
  • Stefania Casu
  • Luigi d’Aquino
  • Maria Martino
  • Antonio Russo
  • Giovanni Bezzi


The synthesis of beta silicon carbide (β-SiC) powders by carbothermal reduction of silica with carbon in a high temperature tube furnace was investigated. As carbon source, fine carbon-containing char from biomass gasification was used, in order to verify the feasibility of producing a high added value material starting from waste residue, and to promote the gasification processes as alternative route of energy production by the proper by-products exploitation. Starting mixture was prepared by mechanically mixing silica and char in the weight ratio of SiO2:C of 1.514; the mixture then reacted in a tube furnace at temperature of 1,550 °C at different residence times (1, 1.5, 2 and 2.5 h), at a constant flow rate of 0.8 dm3 min−1 of argon. The reaction products were characterised with XRD, FTIR spectroscopy and transmission electron microscopy (TEM). The process turned out to be capable of producing high quality SiC powders, suitable for making ceramic materials and composites; the product shows an uniform spherical shape, a very fine particle size (within the range of 30–100 nm) and a purity degree varying from 70% to 95%, depending on the residence time.


Gasification Carbothermal Reduction Biomass Gasification High Residence Time Silicon Carbide Powder 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Sergio Galvagno
    • 1
  • Sabrina Portofino
    • 1
  • Giovanni Casciaro
    • 1
  • Stefania Casu
    • 1
  • Luigi d’Aquino
    • 2
  • Maria Martino
    • 1
  • Antonio Russo
    • 1
  • Giovanni Bezzi
    • 3
  1. 1.ACS-STP C.R. ENEA TrisaiaRotondellaItaly
  2. 2.BAS-BIOTEC-AGRO ENEA TrisaiaRotondellaItaly
  3. 3.FIM-MAT-TEC C.R. ENEA FaenzaFaenzaItaly

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