用钴酸钠和钴酸钙纳米带制备陶瓷复合材料的不对称结构

IF 3.8 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of the American Ceramic Society Pub Date : 2025-01-07 DOI:10.1111/jace.20326

Katharina Kruppa, Itzhak I. Maor, Frank Steinbach, Dorothea Stobitzer, Gennady E. Shter, Meirav Mann-Lahav, Gideon S. Grader, Armin Feldhoff

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引用次数: 0

摘要

采用纳米带共静电纺丝和快速热处理（RTP）法制备了结构不对称的钴酸钠-钴酸钙增强陶瓷复合材料。长期稳定性测试表明，将不稳定的钴酸钠嵌入化学性质更稳定的钴酸钙中，可以有效地防止其在高温空气中降解。这种复合材料具有令人印象深刻的热电性能。在1073 K下测量，复合材料的电导率为183 S cm−1，塞贝克系数为233 μ V K−1，导热系数为2.2 W m−1 K−1。它具有9.9 μ W cm−1 K−2的高功率因数和0.49的品质因数，大大超过了以前研究的钴酸钠-钴酸钙陶瓷复合材料的热电性能。

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Asymmetric structuring of ceramic composite via co-electrospun sodium cobaltite and calcium cobaltite nanoribbons

An asymmetrically structured sodium cobaltite–calcium cobaltite ceramic composite with enhanced texture was synthesized using co-electrospinning of nanoribbons and rapid thermal processing (RTP). Long-term stability tests revealed that embedding the unstable sodium cobaltite in the chemically more stable calcium cobaltite effectively shields it from degradation at high temperatures in air. The composite has overall impressive thermoelectric properties. Measured at 1073 K, the composite showed an electrical conductivity of 183 S cm⁻¹, a Seebeck coefficient of 233 µV K⁻¹, and heat conductivity of 2.2 W m⁻¹K⁻¹. It features a high power factor of 9.9 µW cm⁻¹K⁻² and a figure-of-merit of 0.49, significantly surpassing the thermoelectric performance of sodium cobaltite–calcium cobaltite ceramic composites from previous studies.

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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.