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Effect of Silicon Particle Size on Synthesis and Crystallinity of β-Silicon Carbide Particles

Authors :
Sea Cheon Oh
Soo Ryong Kim
JiYeon Won
Woo Teck Kwon
Yoon Joo Lee
Younghee Kim
Source :
Defect and Diffusion Forum. 353:239-243
Publication Year :
2014
Publisher :
Trans Tech Publications, Ltd., 2014.

Abstract

β-SiC particles were synthesized using silicon powder and carbon black at 1300°C. The effect of grinding the silicon powder raw material into smaller particles on the synthesis and crystallinity of the SiC particles was investigated. The size of the silicon particles decreased and the surface of the silicon particles increasingly oxidized into silicon oxide with increasing grinding time, thus decreasing the yield of SiC because of the higher SiO2 content in the ground silicon powder, since SiO2 transforms into SiC at a higher temperature than does silicon. Although the sizes of the silicon particles in the raw materials were different, all the synthesized SiC crystallites showed similar size. Transmission electron microscopy-energy dispersive X-ray spectroscopy analysis showed that although most of the synthesized SiC particles were smaller than 100 nm, the primary SiC particles had aggregated, and some unreacted silicon was observed inside the large aggregated SiC particles.

Details

ISSN :
16629507
Volume :
353
Database :
OpenAIRE
Journal :
Defect and Diffusion Forum
Accession number :
edsair.doi...........6e8252653c5e9b0303bfeb2163c95596