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

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish
Title of host publicationEngineered Technologies in Materials Science, Geotechnics, Environment and Mechanical Engineering
Pages59-62
Number of pages4
DOIs
Publication statusPublished - 2013
Event2012 International Conference on Engineering Materials, Geotechnical Engineering and Environmental Engineering, EMGEEE 2012 - Shijiazhuang, Hebei, China
Duration: Oct 26 2012Oct 28 2012

Publication series

NameApplied Mechanics and Materials
Volume310
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Other

Other2012 International Conference on Engineering Materials, Geotechnical Engineering and Environmental Engineering, EMGEEE 2012
CountryChina
CityShijiazhuang, Hebei
Period10/26/1210/28/12

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Annealing time dependence on the phase equilibria and thermoelectric property of type-I Ba<sub>8</sub>Cu<sub>6</sub>Ag<sub>2</sub>Si<sub>38</sub> clathrate'. Together they form a unique fingerprint.

Cite this