Thermoelectric Properties of β-SiC Fabricated from Rice Hulls in a Nitrogen Atmosphere

The thermoelectric properties of β-SiC fabricated from rice hulls was investigated by measuring the Seebeck coefficient (α), the electrical conductivity (σ) and the thermal conductivity (κ). The synthesized β-SiC showed n-type conductivity due to the doping of nitrogen into the structure. As the nit...

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Veröffentlicht in:	Journal of the Ceramic Society of Japan 2002/09/01, Vol.110(1285), pp.804-806
Hauptverfasser:	MAEDA, Eishi, KOMATSU, Masahiro, TANI, Eiji, TATEYAMA, Hiroshi
Format:	Artikel
Sprache:	eng
Schlagworte:	Electrical conductivity Grain growth Rice hull Seebeck coefficient β-SiC
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container_title	Journal of the Ceramic Society of Japan
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creator	MAEDA, Eishi KOMATSU, Masahiro TANI, Eiji TATEYAMA, Hiroshi
description	The thermoelectric properties of β-SiC fabricated from rice hulls was investigated by measuring the Seebeck coefficient (α), the electrical conductivity (σ) and the thermal conductivity (κ). The synthesized β-SiC showed n-type conductivity due to the doping of nitrogen into the structure. As the nitrogen pressure increased, the absolute value of the Seebeck coefficient decreased. The electrical conductivity was found to increase with nitrogen content up to about 0.35mass%, beyond which the value remained relatively constant. A power factor of 4×10-6W·m-1·K-2 and a thermal conductivity of about 8W·m-1·K-1 at 1000K resulted in a Z=0.055×10-3K-1 figure of merit.
doi_str_mv	10.2109/jcersj.110.804
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The synthesized β-SiC showed n-type conductivity due to the doping of nitrogen into the structure. As the nitrogen pressure increased, the absolute value of the Seebeck coefficient decreased. The electrical conductivity was found to increase with nitrogen content up to about 0.35mass%, beyond which the value remained relatively constant. 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Ceram. Soc. Japan</addtitle><description>The thermoelectric properties of β-SiC fabricated from rice hulls was investigated by measuring the Seebeck coefficient (α), the electrical conductivity (σ) and the thermal conductivity (κ). The synthesized β-SiC showed n-type conductivity due to the doping of nitrogen into the structure. As the nitrogen pressure increased, the absolute value of the Seebeck coefficient decreased. The electrical conductivity was found to increase with nitrogen content up to about 0.35mass%, beyond which the value remained relatively constant. 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A power factor of 4×10-6W·m-1·K-2 and a thermal conductivity of about 8W·m-1·K-1 at 1000K resulted in a Z=0.055×10-3K-1 figure of merit.</abstract><pub>The Ceramic Society of Japan</pub><doi>10.2109/jcersj.110.804</doi><tpages>3</tpages><oa>free_for_read</oa></addata></record>
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subjects	Electrical conductivity Grain growth Rice hull Seebeck coefficient β-SiC
title	Thermoelectric Properties of β-SiC Fabricated from Rice Hulls in a Nitrogen Atmosphere
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