Annealing time dependence on the phase equilibria and thermoelectric property of type-I Ba8Cu6Ag2Si38 clathrate

Liu Bin; Saisho Makoto; Nagatomo Yuya; Oka Takuya; Osada Toshiko; Miura Hideshi; Furukimi Osamu; Munetoh Shinji

doi:10.4028/www.scientific.net/AMM.310.59

Annealing time dependence on the phase equilibria and thermoelectric property of type-I Ba₈Cu₆Ag₂Si₃₈ clathrate

Liu Bin, Saisho Makoto, Nagatomo Yuya, Oka Takuya, Osada Toshiko, Miura Hideshi, Furukimi Osamu, Munetoh Shinji

Manufacturing Process

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Poly-crystalline Ba₈Cu₆Ag₂Si₃₈ clathrates were synthesized by the arc-melting method and a subsequent annealing treatment. The main phase of all the samples was type-I clathrate. However, there were some precipitates which rich in Cu, Ag or Si in the grain boundary of the as-synthesized sample and the precipitates gradually reduced with the increase of annealing time. The transition metal content in the clathrate increased with the annealing time because of the diffusion of the Cu and Ag atoms from precipitates phase into clathrates phase. The as-synthesized sample was n-type material. For the 576 hours annealed sample, the carrier type changed from n-type to p-type because of the increase of Cu and Ag content in the clathrate.

Original language	English
Title of host publication	Engineered Technologies in Materials Science, Geotechnics, Environment and Mechanical Engineering
Pages	59-62
Number of pages	4
DOIs	https://doi.org/10.4028/www.scientific.net/AMM.310.59
Publication status	Published - 2013
Event	2012 International Conference on Engineering Materials, Geotechnical Engineering and Environmental Engineering, EMGEEE 2012 - Shijiazhuang, Hebei, China Duration: Oct 26 2012 → Oct 28 2012

Publication series

Name	Applied Mechanics and Materials
Volume	310
ISSN (Print)	1660-9336
ISSN (Electronic)	1662-7482

Other

Other	2012 International Conference on Engineering Materials, Geotechnical Engineering and Environmental Engineering, EMGEEE 2012
Country/Territory	China
City	Shijiazhuang, Hebei
Period	10/26/12 → 10/28/12

All Science Journal Classification (ASJC) codes

Engineering(all)

Access to Document

10.4028/www.scientific.net/AMM.310.59

Cite this

Bin, L., Makoto, S., Yuya, N., Takuya, O., Toshiko, O., Hideshi, M., Osamu, F., & Shinji, M. (2013). Annealing time dependence on the phase equilibria and thermoelectric property of type-I Ba₈Cu₆Ag₂Si₃₈ clathrate. In Engineered Technologies in Materials Science, Geotechnics, Environment and Mechanical Engineering (pp. 59-62). (Applied Mechanics and Materials; Vol. 310). https://doi.org/10.4028/www.scientific.net/AMM.310.59

Annealing time dependence on the phase equilibria and thermoelectric property of type-I Ba₈Cu₆Ag₂Si₃₈ clathrate. / Bin, Liu; Makoto, Saisho; Yuya, Nagatomo et al.
Engineered Technologies in Materials Science, Geotechnics, Environment and Mechanical Engineering. 2013. p. 59-62 (Applied Mechanics and Materials; Vol. 310).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Bin, L, Makoto, S, Yuya, N, Takuya, O, Toshiko, O, Hideshi, M, Osamu, F & Shinji, M 2013, Annealing time dependence on the phase equilibria and thermoelectric property of type-I Ba₈Cu₆Ag₂Si₃₈ clathrate. in Engineered Technologies in Materials Science, Geotechnics, Environment and Mechanical Engineering. Applied Mechanics and Materials, vol. 310, pp. 59-62, 2012 International Conference on Engineering Materials, Geotechnical Engineering and Environmental Engineering, EMGEEE 2012, Shijiazhuang, Hebei, China, 10/26/12. https://doi.org/10.4028/www.scientific.net/AMM.310.59

Bin L, Makoto S, Yuya N, Takuya O, Toshiko O, Hideshi M et al. Annealing time dependence on the phase equilibria and thermoelectric property of type-I Ba₈Cu₆Ag₂Si₃₈ clathrate. In Engineered Technologies in Materials Science, Geotechnics, Environment and Mechanical Engineering. 2013. p. 59-62. (Applied Mechanics and Materials). doi: 10.4028/www.scientific.net/AMM.310.59

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abstract = "Poly-crystalline Ba8Cu6Ag2Si38 clathrates were synthesized by the arc-melting method and a subsequent annealing treatment. The main phase of all the samples was type-I clathrate. However, there were some precipitates which rich in Cu, Ag or Si in the grain boundary of the as-synthesized sample and the precipitates gradually reduced with the increase of annealing time. The transition metal content in the clathrate increased with the annealing time because of the diffusion of the Cu and Ag atoms from precipitates phase into clathrates phase. The as-synthesized sample was n-type material. For the 576 hours annealed sample, the carrier type changed from n-type to p-type because of the increase of Cu and Ag content in the clathrate.",

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AU - Toshiko, Osada

AU - Hideshi, Miura

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AB - Poly-crystalline Ba8Cu6Ag2Si38 clathrates were synthesized by the arc-melting method and a subsequent annealing treatment. The main phase of all the samples was type-I clathrate. However, there were some precipitates which rich in Cu, Ag or Si in the grain boundary of the as-synthesized sample and the precipitates gradually reduced with the increase of annealing time. The transition metal content in the clathrate increased with the annealing time because of the diffusion of the Cu and Ag atoms from precipitates phase into clathrates phase. The as-synthesized sample was n-type material. For the 576 hours annealed sample, the carrier type changed from n-type to p-type because of the increase of Cu and Ag content in the clathrate.

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