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Low temperature hydrothermal sintering process for the quasi -complete densification of nanometric α-quartz

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorNDAYISHIMIYE, Arnaud
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLARGETEAU, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPRAKASAM, Mythili
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPECHEV, Stanislav
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorDOURGES, Marie-Anne
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGOGLIO, Graziella
dc.date.issued2018-03
dc.identifier.issn1359-6462
dc.description.abstractEnWe report the first successful densification of polycrystalline α-quartz. The innovative hydrothermal sintering process was used as a low temperature route on sol-gel silica nanoparticles (350 MPa, 300 °C, 90 min) in presence of water or aqueous sodium hydroxide solution (from 0.2 M up to 5 M). For the lowest NaOH concentrations, amorphous silica densification is observed, reaching a compactness of 86%. The basic physical-chemical mechanism proceeds through dissolution-precipitation. When NaOH concentration increases, the kinetics of dissolution are faster, nanoparticles totally dissolve and α-quartz is stabilized during precipitation. 98% dense α-quartz is obtained, the crystallite size increases with NaOH concentration.
dc.language.isoen
dc.publisherElsevier
dc.title.enLow temperature hydrothermal sintering process for the quasi -complete densification of nanometric α-quartz
dc.typeArticle de revue
dc.identifier.doi10.1016/j.scriptamat.2017.10.023
dc.subject.halChimie/Matériaux
bordeaux.journalScripta Materialia
bordeaux.page118-121
bordeaux.volume145
bordeaux.peerReviewedoui
hal.identifierhal-01737296
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01737296v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Scripta%20Materialia&rft.date=2018-03&rft.volume=145&rft.spage=118-121&rft.epage=118-121&rft.eissn=1359-6462&rft.issn=1359-6462&rft.au=NDAYISHIMIYE,%20Arnaud&LARGETEAU,%20Alain&PRAKASAM,%20Mythili&PECHEV,%20Stanislav&DOURGES,%20Marie-Anne&rft.genre=article


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