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Growth of high quality single crystals of strontium doped (Nd,Pr)-nickelates, Nd$_{2−x}$Sr$_x$NiO$_{4+δ}$ and Pr$_{2−x}$SrxNiO$_{4+δ}$

hal.structure.identifierInstitut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
hal.structure.identifierInstitut des Sciences Chimiques de Rennes [ISCR]
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWAHYUDI, Olivia
hal.structure.identifierInstitut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
dc.contributor.authorCERETTI, Monica
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWEILL, Isabelle
hal.structure.identifierLaboratoire Léon Brillouin [LLB - UMR 12]
dc.contributor.authorCOUSSON, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWEILL, François
hal.structure.identifierForschungsneutronenquelle Heinz Maier-Leibnitz (FRM II)
hal.structure.identifierRheinisch-Westfälische Technische Hochschule Aachen University [RWTH]
dc.contributor.authorMEVEN, Martin
hal.structure.identifierInstitut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
dc.contributor.authorGUERRE, Marc
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierIREET, University of Bolton
dc.contributor.authorVILLESUZANNE, Antoine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc.
hal.structure.identifierInstitut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
dc.contributor.authorPAULUS, Werner
dc.date.issued2015-06-03
dc.description.abstractEnLarge size and high quality single crystals of Nd$_{2−x}$Sr$_x$NiO$_{4+δ}$ and Pr$_{2−x}$SrxNiO$_{4+δ}$, with selected composition (x = 0.0, 0.1 and 0.5), were grown by a floating-zone technique using an image furnace. We found that even small deviations from the ideal cation stoichiometry led to either NiO segregation or formation of Ni-poor Pr$_4$Ni$_3$O$_{10−x}$, or RE$_x$O$_y$ intergrowth phases, rendering the title compounds unstable even under ambient conditions. Related to potential applications as membranes in SOFC, we importantly found Nd$_{2−x}$Sr$_x$NiO$_{4+δ}$ and Pr$_{2−x}$SrxNiO$_{4+δ}$ powders, obtained from ground stoichiometric single crystals, to be stable in air at high temperature (1000 °C), contrary to the partial decomposition observed when synthesized as polycrystalline powders by classical solid state synthesis. The presence of NiO/Pr$_4$Ni$_3$O$_{10−x}$ or RE$_x$O$_y$ intergrowth phases are discussed as a drawback limiting high temperature stability for Pr$_2$NiO$_{4+δ}$. Grown single crystals were characterised by neutron and X-ray diffraction as well as by electron microscopy (SEM/EDS), revealing their excellent quality in terms of composition, homogeneity and crystallinity. For each crystal, the oxygen content was determined by thermogravimetric analysis in a reductive atmosphere. Transmission electron microscopy highlighted a complex incommensurate structure for Pr$_2$NiO$_{4.25}$ and Nd$_2$NiO$_{4.25}$ with a 2D modulation vector related to oxygen ordering.
dc.description.sponsorshipFundamental Study of Oxygen Mobility at Moderate Temperature in Solid Oxides - ANR-08-BLAN-0069
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enGrowth of high quality single crystals of strontium doped (Nd,Pr)-nickelates, Nd$_{2−x}$Sr$_x$NiO$_{4+δ}$ and Pr$_{2−x}$SrxNiO$_{4+δ}$
dc.typeArticle de revue
dc.identifier.doi10.1039/c5ce00906e
dc.subject.halChimie/Matériaux
bordeaux.journalCrystEngComm
bordeaux.page6278-6285
bordeaux.volume17
bordeaux.issue33
bordeaux.peerReviewedoui
hal.identifierhal-01171021
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01171021v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=CrystEngComm&rft.date=2015-06-03&rft.volume=17&rft.issue=33&rft.spage=6278-6285&rft.epage=6278-6285&rft.au=WAHYUDI,%20Olivia&CERETTI,%20Monica&WEILL,%20Isabelle&COUSSON,%20Alain&WEILL,%20Fran%C3%A7ois&rft.genre=article


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