Thermoelectric modules built using ceramic legs grown by laser floating zone

The present work reports thefirst attempt of thermoelectric module design, based on oxide materials grownthrough the laserfloating zone technique. Two modules with 4-legs thermoelectric were assembled usingBi2Ba2Co2Oyfibres as p-type legs, while Ca0.9La0.1MnO3and CaMn0.95Nb0.05O3fibres were used as n-type legs.Structural and electrical characterisation of the individualfibres was performed, and the results compared to theliterature. The evolution of open-circuit voltage on heating and cooling up to 723 K, present the expected trendsbased on the Seebeck coefficient of the individualfibres, suggesting good reliability of the modules duringtemperature cycling. The power generation performance was evaluated for a temperature difference up to 500 Kunder different electric loads. The maximum measured power was ~2.2 mW for a module volume of ~39 mm3.Nevertheless, the module here studies possess better performance than those commercially available.publishe

Thermoelectric modules built using ceramic legs grown by laser floating zone

The present work reports the first attempt of thermoelectric module design, based on oxide materials grown through the laser floating zone technique. Two modules with 4-legs thermoelectric were assembled using Bi2Ba2Co2Oy fibres as p-type legs, while Ca0.9La0.1MnO3 and CaMn0.95Nb0.05O3 fibres were used as n-type legs. Structural and electrical characterisation of the individual fibres was performed, and the results compared to the literature. The evolution of open-circuit voltage on heating and cooling up to 723 K, present the expected trends based on the Seebeck coefficient of the individual fibres, suggesting good reliability of the modules during temperature cycling. The power generation performance was evaluated for a temperature difference up to 500 K under different electric loads. The maximum measured power was ~2.2 mW for a module volume of ~39 mm3. Nevertheless, the module here studies possess better performance than those commercially available.The authors gratefully acknowledge the support of i3N (UIDB/50025/2020 & UIDP/50025/2020), CICECO - Aveiro Institute of Materials (UID/CTM/50011/2020) and the REMOTE project (POCI-01-0145-FEDER-031875), financed by COMPETE 2020 Program (Portugal), National Funds through the FCT/MEC (Portugal) and when appropriate co-financed by FEDER under the Portugal2020 Partnership Agreement. This work was also funded by national funds (OE-Portugal), through FCT – Fundação para a Ciência e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. NM Ferreira also acknowledges the grant support from ECIU Research Mobility Fund 2019 edition that allows the visit to Aalborg University to conduct the present study. A. Sotelo and M. A. Madre acknowledge MINECO-FEDER (MAT2017-82183-C3-1-R) and Gobierno de Aragón (Spain) -FEDER (Research Group T54-17R) for financial support.Peer reviewe