+Advanced Search
Preparation and Thermoelectric Properties of Single-phase Mg2Sn Alloys by High Temperature-gradient Directional Solidification
Author:
Affiliation:

Xi’an Aeronautical University,Xi’an

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    Single-phase Mg2Sn crystal was successfully directionally solidified from the melt with a high temperature gradient of 180K/cm. The critical velocity of planar interface and solidified distance for the growth of single-phase Mg2Sn crystal is predicted theoretically and agrees well with the experimental result. The grown Mg2Sn crystals exhibit better thermoelectric performance without influence of the second phase Sn. At the temperature ranging from 300 to 700K, the maximum Seebeck coefficient S and electrical conductivity σ reached -261μVK-1 and 525?-1m-1, respectively. The top value of power factor is 2.29mWm-1K-2 after the doped Bi optimization. The minimum thermal conductivity κ was measured as 4.3Wm-1K-1 at T=500K. The maximum figure of merit is 0.21 at the doping concentration of 1.5at.%Bi. The method developed in this paper can provide a methodological reference for the preparation of ternary Mg2BIV solid solution.

    Reference
    Related
    Cited by
Get Citation

[Li Xin, Xie Hui, Zhang Yalong, Wei Xin. Preparation and Thermoelectric Properties of Single-phase Mg2Sn Alloys by High Temperature-gradient Directional Solidification[J]. Rare Metal Materials and Engineering,2020,49(7):2436~2443.]
DOI:10.12442/j. issn.1002-185X.20191040

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:December 08,2019
  • Revised:December 20,2019
  • Adopted:January 03,2020
  • Online: August 31,2020
  • Published: