Synthesis and thermoelectric properties of single crystalline and polycrystalline Ba8Ga16Ge30

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dc.contributor.authorWang, HFen_AU
dc.contributor.authorCai, KFen_AU
dc.contributor.authorLi, Hen_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorWang, XCen_AU
dc.contributor.authorZhou, CWen_AU
dc.contributor.authorLi, XLen_AU
dc.contributor.authorWang, YYen_AU
dc.contributor.authorAn, BJen_AU
dc.contributor.authorDu, Yen_AU
dc.date.accessioned2010-04-19T04:43:23Zen_AU
dc.date.accessioned2010-04-30T05:08:38Zen_AU
dc.date.available2010-04-19T04:43:23Zen_AU
dc.date.available2010-04-30T05:08:38Zen_AU
dc.date.issued2010-02-18en_AU
dc.date.statistics2010-02-18en_AU
dc.description.abstractLarge Ba8Ga16Ge30 single crystals were synthesized by a Ga-flux method. The single crystals were characterized by X-ray diffraction and energy-dispersive X-ray spectroscopy. The cubic structure of Ba filled type-I germanium clathrates with lattice parameter of 10.767 Å has been confirmed. The Ba8Ga16Ge30 polycrystalline sample was prepared by melting the synthesized single crystals. Thermoelectric properties of the single crystalline and polycrystalline Ba8Ga16Ge30 samples were measured from room temperature to 773 K. The single crystalline sample shows p-type conduction, while the polycrystalline sample exhibits n-type conduction and typical heavily doped semiconducting behavior. At room temperature, the electrical conductivity of the polycrystalline sample is much higher than that of the single crystalline sample, whereas the absolute value of Seebeck coefficient of the single crystalline sample is higher than that of the polycrystalline sample. The maximum power factor for the single crystalline and polycrystalline samples reaches ~17 μW cm−1 K−2 at 773 K and ~10 μW cm−1 K−2 at 500 K, respectively. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationWang, H. F., Cai, K. F., Li, H., Yu, D. H., Wang, X., Zhou, C. W., Li, YX. L., Li, Y, Y., An, B. J., & Du. Yl. (2010). Synthesis and thermoelectric properties of single crystalline and polycrystalline Ba8Ga16Ge30. Journal of Alloys and Compounds, 491(1-2), 684-688. doi:10.1016/j.jallcom.2009.11.045en_AU
dc.identifier.govdoc1555en_AU
dc.identifier.issn0925-8388en_AU
dc.identifier.issue1-2en_AU
dc.identifier.journaltitleJournal of Alloys and Compoundsen_AU
dc.identifier.pagination684-688en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jallcom.2009.11.045en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3203en_AU
dc.identifier.volume491en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCrystal growthen_AU
dc.subjectThermoelectric materialsen_AU
dc.subjectMonocrystalsen_AU
dc.subjectPolycrystalsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectLattice parametersen_AU
dc.titleSynthesis and thermoelectric properties of single crystalline and polycrystalline Ba8Ga16Ge30en_AU
dc.typeJournal Articleen_AU
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