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- Title
Fabrication of SiC by carbothermal-reduction reactions of diatomaceous earth.
- Authors
Matovic, Branko; Saponjic, Aleksandra; Devecerski, Aleksandar; Miljkovic, Miroslav
- 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.
- Subjects
SILICON carbide; LOW temperatures; CRYSTALS; ISOSTATIC pressing; IRON metallurgy
- Publication
Journal of Materials Science, 2007, Vol 42, Issue 14, p5448
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-006-0780-6