EFFECT PARTIAL SUBSTITUTION OF LANTHANUM ON THE THERMAL PROPERTIES OF La0.7-XLnXCa0.3MnO3 (Ln = Pr or Sm) PEROVSKITES

Jessica Ramírez-Hernández, Aidé M. Torres-Huerta, Silvia B. Brachetti-Sibaja, Miguel A. Domínguez-Crespo, Diana Palma-Ramírez, Wencel de la Cruz, Francisco Gutiérrez-Galicia

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

La0.7-xLnxCa0.3MnO3 (Ln = Pr or Sm) perovskites synthesized by Pechini method with different stoichiometries (x = 0.1, 0.3, 0.5 and 0.6) were analyzed in order to evaluate the effect of cationic substitution and final composition on thermal properties; specific heat, thermal conductivity and thermal diffusivity at different temperatures are specifically reported. The results are discussed in terms of the potential use as a cathode material to be applied in solid oxide fuel cells (SOFCs) applications at intermediate temperatures (600 to 800°C). The results showed that thermal conductivity decreases as Pr doping increases; but a different trend is observed with samarium: first, a decrease is observed from x = 0.1 to x = 0.3, and then, from x = 0.3 to x = 0.6, an increase is determined. Also, thermal diffusivity presents a marked behavior when Sm-based perovskites display a high cation substitution (x = 0.6). Thermal expansion coefficient studies are in progress.

Original languageEnglish
Title of host publicationProceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference
Subtitle of host publicationBridging Continents by H2
EditorsIbrahim Dincer, Can Ozgur Colpan, Mehmet Akif Ezan
PublisherInternational Association for Hydrogen Energy, IAHE
Pages870-872
Number of pages3
ISBN (Electronic)9786250008430
StatePublished - 2022
Event23rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022 - Istanbul, Turkey
Duration: 26 Jun 202230 Jun 2022

Publication series

NameProceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2

Conference

Conference23rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022
Country/TerritoryTurkey
CityIstanbul
Period26/06/2230/06/22

Keywords

  • ABO perovskites
  • solid oxide fuel cells
  • thermal conductivity

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