DataVXACS Applied Energy MaterialsPaper
journal article·2024-12-23

Controlling Oxygen Vacancies in Sr0.875La0.1TiO3 with the Nano Titanium for Optimizing Thermoelectric Performance

Zhihao Lou, Ziyao Wei, Jianjun Gou, Jie Xu, Chunlin Gong, Feng Gao

ACS Applied Energy Materials· Volume 7· Issue 24
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Source abstract

Abstract

The nanosized titanium powder exhibits a strong oxygen capture ability, which can effectively increase the carrier concentration of SrTiO 3 . 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 Sr 0.875 La 0.1 TiO 3 /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 SrTiO 3 thermoelectric ceramics.
Source: openalex_inverted_index · Quality: baseline

Research context

Ceramics & glassesNanomaterials

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Thermal Radiation and Cooling Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, State Key Laboratory of Solidification Processing, MIIT Key Laboratory of Radiation Detection Materials and Devices, USI Institute of Intelligence Materials and Structure, Northwestern Polytechnical University, Xi’an 710072, China

Shaanxi Aerospace Flight Vehicle Key Laboratory, School of Astronautics, Northwestern Polytechnical University, Xi’an 710072, China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Scientific Research and Technology Development Program of Guangxi Zhuang Autonomous Region · Higher Education Discipline Innovation Project · State Key Laboratory of New Ceramic and Fine Processing Tsinghua University · National Science and Technology 173 Program of China

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