Synthesis and Thermoelectric Properties of Ceramics Based on Bi2Ca2Co1.7Oy Oxide
- Authors: Klyndyuk A.I.1, Krasutskaya N.S.1, Chizhova E.A.1
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Affiliations:
- Belarusian State Technological University
- Issue: Vol 44, No 2 (2018)
- Pages: 100-107
- Section: Article
- URL: https://journals.rcsi.science/1087-6596/article/view/216419
- DOI: https://doi.org/10.1134/S1087659618020086
- ID: 216419
Cite item
Abstract
Layered ceramics based on bismuth–calcium cobaltite with varied cobalt oxide contents is synthesized by the solid-phase method, the ceramics phase composition is determined, and the microstructure, thermal expansion, electroconductivity, and thermal electromotive force are investigated. The formation of just one compound, ternary oxide composed of Bi2Ca2Co1.7Oy, is established within the quasi-binary Bi2Ca2O5–CoOz system. The effect of the cobalt oxide content on the Bi2Ca2CoxOy ceramics’ microstructure and physicochemical properties is analyzed. The single-phased ceramic sample Bi2Ca2Co1.7Oy demonstrated the highest power factor value among all the investigated samples—26.0 μW/(m K2) at a temperature of 300 K. This sample showed the lowest value of the thermal linear expansion coefficient of 9.72 × 10–6 K–1.
About the authors
A. I. Klyndyuk
Belarusian State Technological University
Author for correspondence.
Email: kai_17@rambler.ru
Belarus, Minsk, 220006
N. S. Krasutskaya
Belarusian State Technological University
Email: kai_17@rambler.ru
Belarus, Minsk, 220006
E. A. Chizhova
Belarusian State Technological University
Email: kai_17@rambler.ru
Belarus, Minsk, 220006