# Microstructure Optimization of Thermoelectric τ1-Al2Fe3Si3 via Graded Temperature Heat Treatments

https://mdr.nims.go.jp/datasets/76fd580d-0537-4681-a616-1a2dd3534e30

## File

- [materials-17-05899 (1).pdf](https://mdr.nims.go.jp/filesets/aacc38e3-6935-46bb-9a37-09f6b59ea22c/download) ([Detail](https://mdr.nims.go.jp/filesets/aacc38e3-6935-46bb-9a37-09f6b59ea22c.md))

## Id

76fd580d-0537-4681-a616-1a2dd3534e30

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-12-30T08:37:35.344573Z

## Updated at

2025-01-06T23:30:33.170953Z

## Published at

2025-01-06T23:30:34.164745Z

## Doi



## First published url

https://doi.org/10.3390/ma17235899

## Date published

2024-12-02

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Microstructure Optimization of Thermoelectric τ1-Al2Fe3Si3 via Graded Temperature
    Heat Treatments
  title_type: original
  lang: en

## Description

- description: To investigate the relationship between microstructure, chemical composition,
    and thermoelectric properties, we have applied graded temperature heat treatments
    to recently developed τ1-Al2Fe3Si3-based thermoelectric (FAST) materials formed
    by a peritectic reaction. We investigated microstructures, chemical compositions,
    and Seebeck coefficients as continuous functions of heat treatment temperature.
    The τ1 phase can become p- and n-type semiconductors without doping by changing
    the Al/Si ratio. The Seebeck coefficient was maximized, exceeding |S| > 140 μVK−1
    for both p- and n-type materials, by heat treatment at 1173 K for 24 h through
    microstructural opti-mization. These results show that combining the graded temperature
    heat treatments and spatial mapping measurements of thermoelectric properties
    gives effective routes to determine the suitable heat treatment temperature for
    materials with multiphase microstructure.
  description_type: abstract
  lang: und

## Creator

- name: Ryuta Yurishima
  role: author
- name: Yoshiki Takagiwa
  role: author
  orcid: https://orcid.org/0000-0003-4508-1708
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Ayako Ikeda
  role: author
  orcid: https://orcid.org/0000-0002-1705-9004
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Teruyuki Ikeda
  role: author

## Contact agent



## Publisher

organization: MDPI AG

## Managing organization



## Keyword

- subject: graded temperature heat treatments
  schema: not_defined
- subject: thermoelectric properties
  schema: not_defined
- subject: microstructure
  schema: not_defined
- subject: phase diagram
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Materials
  issn: '19961944'
  volume: '17'
  issue: '23'
  article_number: '5899'

## Conference



## Related item



## Funding

- identifier: JPNP14004
  funder_name: New Energy and Industrial Technology Development Organization
- identifier: 20K15054
  funder_name: JSPS KAKENHI
- identifier: 2024-095
  funder_name: NIMS Joint Research Hub 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: aacc38e3-6935-46bb-9a37-09f6b59ea22c
  filename: materials-17-05899 (1).pdf
  content_type: application/pdf
  size: 2987363
  md5: b774d32bed6a52dfc0d18b440f5749e7

## Thumbnail

fileset_id: aacc38e3-6935-46bb-9a37-09f6b59ea22c
filename: materials-17-05899 (1).pdf