# Process optimization of contact interface layer for maximizing the performance of Mg<sub>3</sub>(Sb,Bi)<sub>2</sub> based thermoelectric compounds

https://mdr.nims.go.jp/datasets/527a8da8-80a8-47a0-96f7-384ae6af5420

## Files

- [Journal of Materials Chemistry C--Process optimization of contact interface layer for maximizing the performance of Mg3(Sb,Bi)2 based thermoelectric compounds.pdf](https://mdr.nims.go.jp/filesets/bf15e2a7-c383-4105-adea-5d2045ff16cb/download) ([Detail](https://mdr.nims.go.jp/filesets/bf15e2a7-c383-4105-adea-5d2045ff16cb.md))

## Id

527a8da8-80a8-47a0-96f7-384ae6af5420

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-11-08T15:43:03.931092Z

## Updated at

2025-11-11T03:30:09.210213Z

## Published at

2025-11-11T03:22:32.815434Z

## Doi



## First published url

https://doi.org/10.1039/d5tc00851d

## Date published

2025-05-01

## Recorded date published

2025-5-29

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Process optimization of contact interface layer for maximizing the performance
    of Mg<sub>3</sub>(Sb,Bi)<sub>2</sub> based thermoelectric compounds
  title_type: original
  lang: en

## Description

- description: "Mg3(Sb, Bi)2 based compounds exhibit promising thermoelectric (TE)
    performance within the 300-700 K range, making them suitable for mid-temperature
    applications, yet achieving optimal electrical contact between TE material and
    contact material is crucial. One-step sintering has emerged as a widely used technique
    for establishing these contacts in Mg3(Sb, Bi)2 compounds, though variations in
    process parameters can impact contact quality and, consequently TE conversion
    efficiency. Therefore, this study explores the optimization of Mg3(Sb, Bi)2 compound
    using spark plasma sintering with SS304 contacts at three different temperatures
    973 K, 1023 K, and 1073 K. By increasing the sintering temperature from 973 K
    to 1073 K, establishes the good contact between the Mg3(Sb, Bi)2 and SS304 due
    to the improved adhesive strength.  As a result, a significant reduction in the
    specific contact resistivity (ρc) by ~ 60% is realized, without compromising TE
    properties. Furthermore, replacing SS304 powder (SSp) with SS304 foil (SSf) led
    to more uniform and dense layers, achieving lower specific ρc of 8.2  cm2 at
    their interface. Consequently, a maximum conversion efficiency (ηₘₐₓ) of ~ 9.3%
    was obtained at a temperature difference (ΔT) of ~ 380 K for the SSf/Mg3(Sb, Bi)2/SSf
    sintered at 1073 K. Moreover, thermal aging test at 673 K for 30 days confirm
    the robustness of SSf/Mg3(Sb, Bi)2 contacts with negligible degradation of TE
    properties and conversion efficiency of the Mg3(Sb, Bi)2-based single TE leg.
    \    \r\nThis study highlights the importance of optimizing contact processes
    in TE materials to achieve stable performance, illustrating that precise control
    of sintering conditions can greatly improve contact quality."
  description_type: abstract
  lang: und

## Creator

- name: Muhammad Fasih Aamir
  role: author
- name: Raju Chetty
  role: author
  orcid: https://orcid.org/0000-0003-1072-8241
  organization: National Institute for Materials Science
- name: Jayachandran Babu
  role: author
  orcid: https://orcid.org/0000-0002-1182-6655
  organization: National Institute for Materials Science
- name: Takao Mori
  role: author
  orcid: https://orcid.org/0000-0003-2682-1846
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Royal Society of Chemistry (RSC)

## Managing organization



## Keyword

- subject: thermoelectric
  schema: not_defined

## Rights

- identifier: cc-by-nc-3.0

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of Materials Chemistry C
  issn: '20507526'
  volume: '13'
  issue: '21'
  start_page: 10567
  end_page: 10575

## Conference



## Related item



## Funding

- funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: JPMJMI19A1
  funder_name: JST-Mirai Program

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: bf15e2a7-c383-4105-adea-5d2045ff16cb
  filename: Journal of Materials Chemistry C--Process optimization of contact interface
    layer for maximizing the performance of Mg3(Sb,Bi)2 based thermoelectric compounds.pdf
  content_type: application/pdf
  size: 3192412
  md5: 944d6c49cb91856469aa1ae29da40742

## Thumbnail

fileset_id: bf15e2a7-c383-4105-adea-5d2045ff16cb
filename: Journal of Materials Chemistry C--Process optimization of contact interface
  layer for maximizing the performance of Mg3(Sb,Bi)2 based thermoelectric compounds.pdf