Thermoelectric properties of new Zintl phases: Ba4In8Sb16 and Ba6Ge25-x

Sung Jin Kim, Wei Chen, Ctirad Uher, Mercouri G Kanatzidis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new compound Ba4In8Sb16 is being explored for thermoelectric potential. It crystallizes in the orthorhombic space group Pnma with a = 10.166(3) angstroms, b = 4.5239(14) angstroms, c = 19.495(6) angstroms and Z = 1. Ba4In8Sb16 has a 2-dimensional structure with thick corrugated (In8Sb16)8- layers separated by Ba ions. The compound is a narrow band-gap (approximately 0.10 eV) semiconductor. Polycrystalline ingots of Ba4In8Sb16 show room temperature electrical conductivity of 135 S/cm and a Seebeck coefficient of 70 μV/K. The thermal conductivity of Ba4In8Sb16 is about 1.7 W/m·K in the temperature range of 150-300 K. The new compound Ba6Ge25-x was also examined. Ba6Ge25-x adopts chiral clathrate structure with cubic space group P4132 and dimension of a = 14.5483(2) angstroms. Ba6Ge25-x shows room temperature electrical conductivity of 2000 S/cm and a Seebeck coefficient of -18 μV/K. The thermal conductivity was about 2.5 W/m·K at room temperature. Both of the compounds reporting here are air and moisture stable.

Original languageEnglish
Title of host publicationInternational Conference on Thermoelectrics, ICT, Proceedings
PublisherIEEE
Pages165-168
Number of pages4
Publication statusPublished - 1999
Event18th International Conference on Thermoelectrics (ICT'99) - Baltimore, MD, USA
Duration: Aug 29 1999Sep 2 1999

Other

Other18th International Conference on Thermoelectrics (ICT'99)
CityBaltimore, MD, USA
Period8/29/999/2/99

Fingerprint

Seebeck coefficient
Thermal conductivity
Temperature
Ingots
Energy gap
Moisture
Semiconductor materials
Ions
Air
Electric Conductivity

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kim, S. J., Chen, W., Uher, C., & Kanatzidis, M. G. (1999). Thermoelectric properties of new Zintl phases: Ba4In8Sb16 and Ba6Ge25-x. In International Conference on Thermoelectrics, ICT, Proceedings (pp. 165-168). IEEE.

Thermoelectric properties of new Zintl phases : Ba4In8Sb16 and Ba6Ge25-x. / Kim, Sung Jin; Chen, Wei; Uher, Ctirad; Kanatzidis, Mercouri G.

International Conference on Thermoelectrics, ICT, Proceedings. IEEE, 1999. p. 165-168.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kim, SJ, Chen, W, Uher, C & Kanatzidis, MG 1999, Thermoelectric properties of new Zintl phases: Ba4In8Sb16 and Ba6Ge25-x. in International Conference on Thermoelectrics, ICT, Proceedings. IEEE, pp. 165-168, 18th International Conference on Thermoelectrics (ICT'99), Baltimore, MD, USA, 8/29/99.
Kim SJ, Chen W, Uher C, Kanatzidis MG. Thermoelectric properties of new Zintl phases: Ba4In8Sb16 and Ba6Ge25-x. In International Conference on Thermoelectrics, ICT, Proceedings. IEEE. 1999. p. 165-168
Kim, Sung Jin ; Chen, Wei ; Uher, Ctirad ; Kanatzidis, Mercouri G. / Thermoelectric properties of new Zintl phases : Ba4In8Sb16 and Ba6Ge25-x. International Conference on Thermoelectrics, ICT, Proceedings. IEEE, 1999. pp. 165-168
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AB - A new compound Ba4In8Sb16 is being explored for thermoelectric potential. It crystallizes in the orthorhombic space group Pnma with a = 10.166(3) angstroms, b = 4.5239(14) angstroms, c = 19.495(6) angstroms and Z = 1. Ba4In8Sb16 has a 2-dimensional structure with thick corrugated (In8Sb16)8- layers separated by Ba ions. The compound is a narrow band-gap (approximately 0.10 eV) semiconductor. Polycrystalline ingots of Ba4In8Sb16 show room temperature electrical conductivity of 135 S/cm and a Seebeck coefficient of 70 μV/K. The thermal conductivity of Ba4In8Sb16 is about 1.7 W/m·K in the temperature range of 150-300 K. The new compound Ba6Ge25-x was also examined. Ba6Ge25-x adopts chiral clathrate structure with cubic space group P4132 and dimension of a = 14.5483(2) angstroms. Ba6Ge25-x shows room temperature electrical conductivity of 2000 S/cm and a Seebeck coefficient of -18 μV/K. The thermal conductivity was about 2.5 W/m·K at room temperature. Both of the compounds reporting here are air and moisture stable.

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