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Your search keyword '"Clathrate compounds -- Electric properties"' showing total 4 results
Start Over Descriptor "Clathrate compounds -- Electric properties" Topic barium compounds -- thermal properties
4 results on '"Clathrate compounds -- Electric properties"'

1. Crystal structure and thermoelectric properties of type-I clathrate compounds in the Ba-Ga-Ge system

Author

Okamoto, Norihiko L., Kishida, Kyosuke, Tanaka, Katsushi, and Inui, Haruyuki

Subjects
Clathrate compounds -- Electric properties, Clathrate compounds -- Thermal properties, Barium compounds -- Thermal properties, Barium compounds -- Electric properties, Gallium compounds -- Electric properties, Gallium compounds -- Thermal properties, Crystals -- Structure, Crystals -- Analysis, Physics
Abstract

An investigation on the crystal structure and thermoelectric properties of type-I clathrate compounds in the Ba-Ga-Ge system is conducted as a function of Ga content. The absolute values of electrical resistivity and Seebeck coefficient increase, while that of lattice thermal conductivity decreases with the increase in the Ga content.

Published
2006

2. Enhancement of thermoelectric efficiency in type-VIII clathrate [Ba.sub.8][Ga.sub.16][Sn.sub.30] by Al substitution for Ga

Author

Shukang Deng, Saiga, Yuta, Suekuni, Koichiro, and Takabatake, Toshiro

Subjects
Barium compounds -- Structure, Barium compounds -- Electric properties, Barium compounds -- Thermal properties, Clathrate compounds -- Electric properties, Clathrate compounds -- Thermal properties, Gallium -- Electric properties, Gallium -- Thermal properties, Tin -- Electric properties, Tin -- Thermal properties, Aluminum alloys -- Electric properties, Aluminum alloys -- Thermal properties, Physics
Abstract

Single-crystalline samples of type-VIII clathrate [Ba.sub.8][Ga.sub.16-x][Al.sub.x][Sn.sub.30] are grown from Sn flux to analyze the structural and thermoelectric properties from 300 to 600 K. The Seebeck coefficients of all samples are largely negative and the large thermopower has coexisted with the metallic behavior in the electrical resistivity.

Published
2010

3. Thermal expansion of thermoelectric type-I-clathrates

Author

Falmbigl, M., Rogl, G., Rogl, P., Kriegisch, M., Muller, H., Bauer, E., Reinecker, M., and Schranz, W.

Subjects
Barium compounds -- Thermal properties, Barium compounds -- Electric properties, Cadmium -- Thermal properties, Cadmium -- Electric properties, Clathrate compounds -- Thermal properties, Clathrate compounds -- Electric properties, Zinc compounds -- Thermal properties, Zinc compounds -- Electric properties, X-rays -- Diffraction, X-rays -- Usage, Physics
Abstract

Several studies are conducted to explain the thermal expansion taking place in the different series of thermoelectric type-I-clathrates. The thermal expansion is shown to be highly dependent on the temperature and the thickness of the clathrates.

Published
2010

4. Crystal structure and thermoelectric properties of type-III clathrate compounds in the Ba-In-Ge system

Author

Jung-Hwan Kim, Okamoto, Norihiko L., Kishida, Kyosuke, Tanaka, Katsushi, and Inui, Haruyuki

Subjects
Barium compounds -- Structure, Barium compounds -- Electric properties, Barium compounds -- Thermal properties, Clathrate compounds -- Structure, Clathrate compounds -- Electric properties, Clathrate compounds -- Thermal properties, Scanning electron microscopes -- Observations, Heat -- Conduction, Heat -- Analysis, Physics
Abstract

The crystal structure and thermoelectric properties of type-III clathrate compounds in the Ba-In-Ge system are evaluated as a function of In content. The findings demonstrate the changes in lattice thermal conductivity in terms of the low rattling frequency of the guest atom as well as the low Debye temperature of the cage framework.

Published
2007

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