Optical and Electron Paramagnetic Resonance Study of Sponge Silicon Carbide Prepared by Direct Synthesis

V.S. Kiselov; Ekaterina N. Kalabukhova; S.N. Lukin; A.A. Sitnikov; V.A. Yukhymchyk; Rositza Yakimova

doi:10.4028/www.scientific.net/MSF.556-557.399

Paper Titles

Micro-Photoluminescence Mapping of Defect Structures in SiC Wafers
p.383

Micro-Raman Investigation of Defects in a 4H-SiC Homoepilayer
p.387

Nitrogen Donor Aggregation in 4H-SiC: g-Tensor Calculations
p.391

Nonequilibrium Carrier Dynamics in DPB-Free 3C-SiC Layer Studied by Dynamic Grating Technique in Wide Excitation and Temperature Range
p.395

Optical and Electron Paramagnetic Resonance Study of Sponge Silicon Carbide Prepared by Direct Synthesis
p.399

Optical Investigation of Cubic SiC Layers Grown on Hexagonal SiC Substrates by CVD and VLS
p.403

Photoluminescence of 6H-SiC Nanostructures
p.407

Properties of Different Room-Temperature Photoluminescence Bands in 4H-SiC Substrates Investigated by Mapping Techniques
p.411

Raman Spectra of a 4H-SiC Epitaxial Layer on Porous and Non-Porous 4H-SiC Substrates
p.415

HomeMaterials Science ForumMaterials Science Forum Vols. 556-557Optical and Electron Paramagnetic Resonance Study...

Optical and Electron Paramagnetic Resonance Study of Sponge Silicon Carbide Prepared by Direct Synthesis

Abstract:

The objective of the present work is to examine the preparation and characterization of the SiC sponge obtained by direct synthesis of high purity graphite and silicon powder in inert atmosphere at 1900 - 2000 0C for 2-3 hours. To burn out the carbon excess the samples were subsequently heated in oxygen atmosphere at 800 -900 0C resulting in a weight loss of SiC. The relative density of SiC sponge is 1.5-1.7 g/cm 3. The advantages of the proposed method are the high rate of ceramic yield and capability to create the ceramic samples of preliminary selected shape by using a graphite cell of different configurations. Raman scattering spectroscopy and electron paramagnetic resonance (EPR) data have shown that SiC sponge produced by direct synthesis of graphite and silicon powder consists of 6H and 3C SiC polytypes.

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Materials Science Forum (Volumes 556-557)

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399-402

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.556-557.399

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Online since:

September 2007

Authors:

V.S. Kiselov, Ekaterina N. Kalabukhova, S.N. Lukin, A.A. Sitnikov, V.A. Yukhymchyk, Rositza Yakimova

Keywords:

Electron Paramagnetic Resonance (EPR), Raman Scattering, Sponge Silicon Carbide

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