The effects of metallic Si addtions on the synthesis of β-SiC powders using a sol-gel method

Gyu Mi Kim, Gyung Sun Cho, Dea Soon Lim, Sang Whan Park

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Single phase (β-SiC powders were synthesized using Si02/C hybrid precursors with and without the addition of metallic SI powders. The SICVC hybrid precursors with various C/SI mole ratios (1.6-4.0) were prepared by a sol-gel process using tetraethyl orthosilicate and phenol resin as starting materials. Fine (β-SiC powders were synthesized by the carbothermal reduction of the SICVC hybrid precursor with and without the addition of metallic SI powders in the temperature range between 1250 C-1800 °C under a vacuum atmosphere. Single phase (β-SiC powders were obtained by the carbothermal reduction of the SICVC hybrid precursor with a C/SI mole ratio of 1.6 above 1600 °C under a vacuum atmosphere. It was found that the addition of metallic SI powders to the the SICVC hybrid precursor with excess carbon reduced the temperature for the synthesis of single phase [β-SiC powders to as low as 1350 °C. The particle sizes of synthesized (β-SiC powders from the metallic SI powder added SICVC hybrid precursor with excess carbon were less than 1 fan, in which fine β-SiC powders appeared to be slightly aggregated.

Original languageEnglish
Pages (from-to)377-383
Number of pages7
JournalJournal of Ceramic Processing Research
Volume11
Issue number3
Publication statusPublished - 2010

Keywords

  • Carbothermal
  • SiC powder
  • Sol-gel
  • Synthesis

ASJC Scopus subject areas

  • Ceramics and Composites

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