High-performance thermoelectric calcium cobaltite nanoribbon ceramic via electrospinning and dual spark plasma texturing

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-10-23 DOI:10.1111/jace.20198

Katharina Kruppa, Itzhak I. Maor, Anat Karlin, Frank Steinbach, Gennady E. Shter, Dorothea Stobitzer, Hilke Petersen, Bernd Breidenstein, Meirav Mann-Lahav, Gideon S. Grader, Armin Feldhoff

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Abstract

High-performance polycrystalline calcium cobaltite ceramic was synthesized via electrospinning of nanoribbons, followed by dual-process compaction using spark plasma sintering and edge-free spark plasma texturing. The combination of nanoribbon electrospinning and this multistage sintering technique was employed for the first time and resulted in exceptionally well-textured thermoelectric ceramics. The textured ceramic had excellent thermoelectric properties. At 1073 K, the ceramic exhibited an electrical conductivity of 268 S cm⁻¹, a Seebeck coefficient of 247 µV K⁻¹ and a heat conductivity of 3.3 W m⁻¹ K⁻¹. In addition, the power factor and figure-of-merit reached enormously high values of 16.3 µW cm⁻¹ K⁻² and 0.53, respectively. This represents the highest thermoelectric performance reported to date not only for electrospun, polycrystalline calcium cobaltite fiber ceramics, but also for undoped polycrystalline calcium cobaltite ceramics.

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通过静电纺丝和双火花等离子体变形制备高性能热电钴酸钙纳米带陶瓷

采用静电纺丝法制备了高性能多晶钴酸钙陶瓷，并对纳米带进行了放电等离子烧结和无边等离子织构双工艺压实。首次将纳米带静电纺丝与多级烧结技术相结合，制备出了具有良好结构的热电陶瓷。该织构陶瓷具有优异的热电性能。在1073 K时，陶瓷的电导率为268 S cm−1，塞贝克系数为247µV K−1，导热系数为3.3 W m−1 K−1。此外，功率因数和品质因数分别达到了16.3µW cm−1 K−2和0.53。这不仅代表了迄今为止报道的电纺多晶钴酸钙纤维陶瓷的最高热电性能，而且也代表了未掺杂多晶钴酸钙陶瓷的最高热电性能。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.