Thermoelectric modules built using ceramic legs grown by laser floating zone

Ferreira, N.M.; Lopes, Diogo Pereira; Costa, F.M.; Sotelo, A.; Madre, M. A.; Rezania, Alireza

doi:10.1016/j.ceramint.2020.06.213

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…The open-circuit voltage under these conditions was V oc = 1.228 V, while the maximum generated power reached the value of P max = 20.3 mW. At such a V oc value, the achieved power of the module is relatively low in comparison with other oxide-based TEGs reported in the literature . The main reason is apparently related to the high internal resistance, R int , of the module.…”

Section: Resultsmentioning

confidence: 75%

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Tubular Thermoelectric Module Based on Oxide Elements Grown by the Laser Floating Zone

Merkulov

Lopes

Markov

et al. 2021

ACS Appl. Energy Mater.

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This work seeks possibilities for advancing the thermoelectric oxide technology by exploring a module design involving materials produced by laser processing. A tubular thermoelectric generator of modular construction with functional elements located parallel to a pipe-shaped heat source was designed and manufactured. The p- and n-type counterparts based on Ca3Co4O9 and Ca0.95Pr0.05MnO3 were grown by the laser floating zone (LFZ) technique, ensuring highly dense microstructures and giving the unique possibility for fast and crucible-free processing of the legs with desirable geometry. The detailed structural and microstructural characterization indicated that the LFZ processing should be accompanied with an additional thermal annealing step to equilibrate the phase composition. Although the measured electrical performance was found close to or slightly higher compared to that of similar materials produced by other routes, it was still notably suppressed by the remaining phase impurities affecting the module’s output. The maximum observed power output of the module containing 12 Ca3Co4O9/Ca0.95Pr0.05MnO3 thermoelectric couples reached up to 20 mW at a temperature gradient of 389 °C and a hot side temperature of 525 °C. The contribution of various factors to the overall performance was analyzed. The results suggest that the power output could be significantly enhanced by decreasing the contact resistance at the cold side and proper optimization of the LFZ processing conditions.

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Section: Resultsmentioning

confidence: 75%

“…At such a V oc value, the achieved power of the module is relatively low in comparison with other oxide-based TEGs reported in the literature. 46 The main reason is apparently related to the high internal resistance, R int , of the module.…”

Section: Resultsmentioning

confidence: 99%

Tubular Thermoelectric Module Based on Oxide Elements Grown by the Laser Floating Zone

Merkulov

Lopes

Markov

et al. 2021

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…5b). 28 The precise and adaptable technique combining spraycoating and laser structuring is employed to engineer ceramic layers on a versatile substrate, suitable for various applications. A thermoelectric material Ca 3 Co 4 O 9 (10), was employed in the process and affixed onto a exible ceramic substrate.…”

Section: Ceramic Based Thermoelectric Devicesmentioning

confidence: 99%

“…15a). 46 Researchers have conducted investigations into the structural parameters, and electronic band structure, as well as the half-metallic and thermoelectric properties of Sr 2 EuReO 6 compound materials (28). Utilizing density-functional calculations within the framework of the generalized gradient approximation the computational analyses reveal a half-metallic nature in the electronic properties.…”

Section: Metal Composite-based Thermoelectric Devicesmentioning

confidence: 99%