Electrical properties of bio-SiC and Si components of the SiC/Si biomorphic composite |
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Authors: | T S Orlova D V Il’in B I Smirnov I A Smirnov R Sepulveda J Martinez-Fernandez A R de Arellano-Lopez |
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Institution: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia;(2) Universidad de Sevilla, Sevilla, 41080, Spain |
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Abstract: | The electrical resistivity ρ of bio-SiC, a highly porous cellular material prepared from a biomorphic composite SiC/Si based on white eucalyptus wood through the chemical removal of silicon, was measured in the temperature range 5–100 K. The electrical resistivity of bio-SiC was found to be anisotropic along and across the cellular pores. The activation energy of charge transfer in bio-SiC was estimated. The measured values of ρ for the SiC/Si biomorphic composite and bio-SiC were used to determine the electrical resistivity ρ and the carrier concentration in silicon, which is one of the constituents of the composite. |
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