Synthesis and surface characterization of the La<inf>0.7-x</inf>Pr<inf>x</inf>Ca<inf>0.3</inf>MnO<inf>3</inf> (LPCM) perovskite by a non-conventional microwave irradiation method

A. C. Ferrel-Álvarez, M. A. Domínguez-Crespo, H. Cong, A. M. Torres-Huerta, S. B. Brachetti-Sibaja, W. De La Cruz

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Abstract

© 2017 Elsevier B.V. A series of La0.7-xPrxCa0.3MnO3 (x = 0.35, 0.52 or 0.63) perovskites were synthesized using microwave method at different reaction times (3, 4 and 5 min) as possible cathode material for solid oxide fuel cell (SOFCs). SOFCs are a forward looking technology for a highly efficient, environmental friendly power generation. Variation of lattice parameters, unit cell volume and final composition with Pr concentration were analyzed by Rietveld refinement and X-ray photo electron spectroscopy (XPS). Thereafter, samples were sintered (at 1000 °C) to evaluate their electrical properties at room temperature. Rietveld refinement showed that all the samples were a single –phase perovskite –type and belongs to orthorhombic Pnma structure. The atomic composition of doped samples is close to theoretical stoichiometric values. XPS analysis revealed significant changes in the La 3d, Ca 2p, Mn 2p and O 1s intensities as a result of the Pr incorporation.
Original languageAmerican English
Pages (from-to)1750-1758
Number of pages1574
JournalJournal of Alloys and Compounds
DOIs
StatePublished - 25 Feb 2018

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