Controlling Oxygen Vacancies in Sr<sub>0.875</sub>La<sub>0.1</sub>TiO<sub>3</sub> with the Nano Titanium for Optimizing Thermoelectric Performance
The nanosized titanium powder exhibits a strong oxygen capture ability, which can effectively increase the carrier concentration of SrTiO3. However, it is essential to prevent oxidation before sintering. In this study, the impact of cold isostatic pressing (CIP) and calcination in an argon atmosphere on the microstructure and thermoelectric properties of Sr0.875La0.1TiO3/nano Ti ceramics was explored. The results indicate that the carrier concentration of samples prepared by CIP can be significantly enhanced while simultaneously reducing the thermal conductivity through a notable grain size reduction of titanium oxide and augmentation of oxygen vacancy concentration. At 1073 K, the ZT value of the sample calcined in air and prepared by CIP was 0.22, exhibiting a 27% enhancement compared to that of the sample formed by dry press. Therefore, the combination of CIP and nanoscale Ti provides an efficient approach to manipulate the electrical and thermal transport properties of SrTiO3 thermoelectric ceramics.
Authors
- Chunlin Gong (ORCID: https://orcid.org/0000-0003-4803-3867)
- Jie Xu (ORCID: https://orcid.org/0000-0002-9155-4097)
- Jian‐Jun Gou (ORCID: https://orcid.org/0000-0003-4510-6063)
- Feng Gao (ORCID: https://orcid.org/0000-0002-5075-4076)
- Zhihao Lou (ORCID: https://orcid.org/0000-0002-6165-9664)
- Ziyao Wei (ORCID: https://orcid.org/0009-0001-3454-4159)
Institutions
- Northwestern Polytechnical University (CN)
- State Key Laboratory of Solidification Processing
Publication Details
- Journal
- ACS Applied Energy Materials
- Published
- 2024-12-04
- DOI
- https://doi.org/10.1021/acsaem.4c02807
- Citations
- 3
- Primary Topic
- Advanced Thermoelectric Materials and Devices
- Type
- article
- Field-Weighted Citation Impact
- 0.35
Funders
- National Natural Science Foundation of China
- Scientific Research and Technology Development Program of Guangxi
- Higher Education Discipline Innovation Project
- National Key Research and Development Program of China