Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowder

Autor: Alexandre Verchère, Sandrine Cottrino, Gilbert Fantozzi, Shashank Mishra, Thomas Gaudisson, Nicholas Blanchard, Stéphane Pailhès, Stéphane Daniele, Sylvie Le Floch

Publikováno v: Ceramics, Vol 3, Iss 4, Pp 507-520 (2020)

Sintering under pressure by means of the spark plasma sintering (SPS) technique is a common route to reduce the sintering temperature and to achieve ceramics with a fine-grained microstructure. In this work, high-density bulk TiO2 was sintered by hig

Externí odkaz: https://doaj.org/article/f6b78757e8a8432095fc6cc1bdf2f4e7

Extreme structural stability of Ti0.5Sn0.5O2 nanoparticles: synergistic effect in the cationic sublattice

Autor: Denis Machon, Sylvie Le Floch, Shashank Mishra, Stéphane Daniele, Karine Masenelli-Varlot, Patrick Hermet, Patrice Mélinon

Publikováno v: Nanoscale
Nanoscale, 2022, 14 (38), pp.14286-14296. ⟨10.1039/D2NR03441G⟩

International audience; Ti0.5Sn0.5O2 nanoparticles (∼5 nm and ∼10 nm) have been studied under high pressure by Raman spectroscopy. For particles with diameter ∼10 nm, a transformation has been observed at 20–25 GPa while for particles with �

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95ec93f98615eff38dab914c79d22a13
https://doi.org/10.1039/d2nr03441g

In situ X-ray diffraction study of a TiO2 nanopowder Spark Plasma Sintering under very high pressure

Autor: Sandrine Cottrino, Thomas Gaudisson, Stéphane Pailhès, Emanuela Archina Ferrara, Shashank Mishra, Stéphane Daniele, Mohamed Mézouar, Alain Largeteau, Yann Le Godec, Sylvie Le Floch

Publikováno v: Journal of the European Ceramic Society
Journal of the European Ceramic Society, 2023, 43 (7), pp.2783-2793. ⟨10.1016/j.jeurceramsoc.2022.11.037⟩

International audience; We investigated the effect of very high pressure on the sintering temperature, phase transition and the grain growth during Spark Plasma Sintering (SPS) of a 15 nm TiO2 nanopowder. Using in situ synchrotron X-ray diffraction d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0dd808f6925fd0a312d57d53c209d84
https://hal.science/hal-03943653

Effect of extreme mechanical densification on the electrical properties of carbon nanotube micro-yarns

Autor: Cassandre Miralaei, Sylvie Le Floch, Regis Debord, Hung V Nguyen, Julio C Da Silva, Alfonso San-Miguel, Hélène Le Poche, Stephane Pailhès, Vittoria Pischedda

Publikováno v: Nanotechnology
Nanotechnology, 2022, 33 (27), pp.275708. ⟨10.1088/1361-6528/ac6039⟩

We have explored the effect of high pressure post-treatment in optimizing the properties of carbon nanotube yarns and found that the application of dry hydrostatic pressure reduces porosity and enhances electrical properties. The CNT yarns were prepa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c19196e6107552f05350e8ac044415d
https://hal.science/hal-03654908

Raman spectroscopy to determine CO2 solubility in mafic silicate melts at high pressure: Haplobasaltic, haploandesitic and approach of basaltic compositions

Autor: Nicolas Sator, Julien Amalberti, Philippe Sarda, Daniel R. Neuville, Charles Le Losq, Bertrand Guillot, Tahar Hammouda, Sylvie Le Floch, Eva Chamorro-Pérez

Publikováno v: Chemical Geology
Chemical Geology, 2021, 582, pp.120413. ⟨10.1016/j.chemgeo.2021.120413⟩
Chemical Geology, Elsevier, 2021, 582, pp.120413. ⟨10.1016/j.chemgeo.2021.120413⟩

CO2 degassing of mafic silicate melts is an important part of the terrestrial carbon cycle, at mid-ocean ridges, oceanic hot spots, or in the middle of continents. Deeper CO2-bearing mafic magmas may also exist, such as those suspected in the D″ zo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c547a978b2551499ffd6542edcfd661
https://univ-lyon1.hal.science/hal-03325013