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Fabrication and transport properties of ternary thermoelectric composites 0.7 Ca3Co3.9Cu0.1O9/0.3 Bi2Ca2Co1.9Cu0.1Oy/x Ag

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Abstract

Ag inclusions were introduced into 0.7 Ca3Co3.9Cu0.1O9/0.3 Bi2Ca2Co1.9Cu0.1Oy composites. Characteristic diffraction peak (111) of Ag is detected. Ag inclusions are with irregular particle shape, and the largest particle is about 10 μm. As Ag content (≤ 9 wt%) increases, the electrical resistivity reduces; meanwhile, transformation from semiconductor transport to metallic transport happens. With the rise of Ag content, the Seebeck coefficient reduces in the temperature range 373 K to 773 K apparently. However, its divergence among samples gradually becomes narrow above 773 K. The highest ZT of composites reaches 0.29 at 973 K.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Xihua University, No 999, Jinzhou Road, Chengdu, 610039, Sichuan, China

    Ningbo Feng, Yi He & Yingrong Jin

  2. Graduate School & Faculty of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan

    Yun Lu

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  1. Ningbo Feng
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Correspondence to Ningbo Feng.

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Feng, N., He, Y., Lu, Y. et al. Fabrication and transport properties of ternary thermoelectric composites 0.7 Ca3Co3.9Cu0.1O9/0.3 Bi2Ca2Co1.9Cu0.1Oy/x Ag. MRS Communications 11, 51–56 (2021). https://doi.org/10.1557/s43579-020-00001-z

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