NDAYISHIMIYE, Arnaud; LARGETEAU, Alain; PRAKASAM, Mythili; PECHEV, Stanislav; DOURGES, Marie-Anne; GOGLIO, Graziella

doi:10.1016/j.scriptamat.2017.10.023

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

NDAYISHIMIYE, Arnaud
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

LARGETEAU, Alain
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

PRAKASAM, Mythili
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

Idioma

Article de revue

Este ítem está publicado en

Scripta Materialia. 2018-03, vol. 145, p. 118-121

Elsevier

Resumen en inglés

We 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.< Leer menos

Metadatos

Licencia de uso del documento

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

Idioma

Este ítem está publicado en

Resumen en inglés

DOI

Orígen

Centros de investigación