SiC Fabrication by carbothermal reduction of sepiolite
Pošarac, Milica B.
Radosavljević-Mihajlović, Ana S.
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In this paper, the possibility of using sepiolite as Si precursor for low temperature synthesis of silicon carbide (SiC) via carbothermal-reduction reactions was studied. A sepiolite of Serbian origin and carbon (precursor-saccharose) as reducing agent were used. The green bodies with C/SiO2 = 7 ratio were carbonised at 1073K and heat-treated at 1673K (controlled Ar flow atmosphere). Phase evolution, phase content and weight loss were followed as a function of temperature and chemical activation processes of sepiolite. Starting materials and products have been characterized by means of XRD and SEM (EDS) investigations. The results show that sepiolite can be very effective source for obtaining of silicon carbide powders.
Keywords:SiC / sepiolite / carbothermal-reduction / carbide
Source:Journal of Optoelectronics and Advanced Materials, 2008, 10, 4, 876-879
- 5th International Conference on New Research Trends in Materials Science, Sep, 2007, Sibiu, Romania