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EVALUATION OF STRUCTURAL AND FUNCTIONAL PROPERTIES OF LA0.6SR0.4MNO3 PEROVSKITE PREPARED BY THE FAST SOLUTION COMBUSTION APPROACH

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dc.creatorCHRISTOPHER GONZALO SALVO MEDALLA
dc.date2022
dc.date.accessioned2025-01-10T15:34:49Z
dc.date.available2025-01-10T15:34:49Z
dc.date.issued2022
dc.description.abstractA SERIES OF LA0.6SR0.4MNO3 (LSM) PEROVSKITE WAS MADE USING THE RAPID SOLUTION COMBUSTION METHOD, WHICH WAS CALCINED BY VARYING THE TEMPERATURES. IN ORDER TO DETERMINE HOW THE CALCINATION TEMPERATURE AFFECTED THE NANOPOWDERS PRODUCED AND CALCINED AT VARIOUS TEMPERATURES, THEIR MICROSTRUCTURAL, MORPHOLOGICAL, COMPOSITIONAL, OPTICAL, AND ELECTRICAL PROPERTIES WERE ANALYZED USING CORRESPONDING CHARACTERIZATION TOOLS. THE XRD RESULTS SHOWED THE COEXISTENCE OF THE RHOMBOHEDRAL POLYMORPHS R-3C AND PM-3M FOR THE PEROVSKITE PHASE UNDER A CALCINATION TEMPERATURE OF 1400 °C, WHICH WERE ELIMINATED WITH INCREASED CALCINATION TEMPERATURE. THE AVERAGE GRAIN SIZE WAS FOUND TO INCREASE WITH INCREASING CALCINATION TEMPERATURE. THE EDS ANALYSIS SHOWED BETTER AGREEMENT OF THE STOICHIOMETRY WITH THE THEORETICAL COMPOSITION. THE APPARENT POROSITY DECREASED WITH INCREASING TEMPERATURE DUE TO THE COALESCENCE OF SINTERING PORES. THE SAMPLE OBTAINED AFTER CALCINATION AT 1500 °C SHOWED 10.3% POROSITY. THE HARDNESS ALSO IMPROVED WITH INCREASING CALCINATION TEMPERATURE AND REACHED A MAXIMUM VALUE OF 0.4 GPA, WHICH MATCHED THE BULK DENSITY. A SIMILAR TREND WAS OBSERVED IN THE RESISTIVITY STUDIES AS A FUNCTION OF TEMPERATURE, AND ALL THE SAMPLES EXHIBITED A LOW RESISTIVITY OF ~1.4 ?·CM IN THE TEMPERATURE RANGE OF 500?600 °C. THE OPTICAL CHARACTERIZATION SHOWED BROAD ABSORPTION AT 560?660 NM AND BANDWIDTH VALUES BETWEEN 3.70 AND 3.95 EV, ACCORDING TO THE APPLIED HEAT TREATMENT.
dc.formatapplication/pdf
dc.identifier.doi10.3390/catal12121636
dc.identifier.issn2073-4344
dc.identifier.issn2073-4344
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/12683
dc.languagespa
dc.publisherCatalysts
dc.relation.uri10.3390/catal12121636
dc.rightsPUBLICADA
dc.subjectRESISTIVITY
dc.subjectMICROSTRUCTURE
dc.subjectLSM
dc.subjectHARDNESS
dc.subjectFAST SOLUTION COMBUSTION SYNTHESIS
dc.titleEVALUATION OF STRUCTURAL AND FUNCTIONAL PROPERTIES OF LA0.6SR0.4MNO3 PEROVSKITE PREPARED BY THE FAST SOLUTION COMBUSTION APPROACH
dc.title.alternativeEVALUACIÓN DE ESTRUCTURAL Y FUNCIONAL PROPIEDADES DE LA0.6SR0.4MNO3 PEROVSKITA PREPARADO POR EL RÁPIDO SOLUCIÓN COMBUSTIÓN ACERCARSE
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA MECANICA
ubb.SedeCONCEPCIÓN
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