Design of 0–3 type nanocomposites using hydrothermal sintering

Arnaud Ndayishimiye (1) , Sonia Buffiere (1) , Marie-Anne Dourges (2) , Alain Largeteau (1) , Mythili Prakasam (1) , Stéphane Mornet (1) , Ondřej Kaman (3) , Jirák Zdenĕk (4) , Jiří Hejtmánek (4) , Graziella Goglio (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 ISM - Institut des Sciences Moléculaires
3 Institute of Physics
4 Institute of Physics

We report here the successful design of 0–3 type nanocomposites where 30 nm ferromagnetic metallically conducting cores of manganite La0.66Sr0.34MnO3 (LSMO) are discretely distributed in an insulating silica matrix. Starting from LSMO@SiO2 core@shell nanoparticles, hydrothermal sintering process was used as a low temperature densification route (300 °C, 350 MPa, 90 min) in presence of 0.2 M aqueous sodium hydroxide solution. This process based on a pressure solution creep in the contact zones between nanoparticles allows the design of complex microstructures preventing the grain growth of the cores and the formation of interphases between the cores and the matrix.

Mots clés: Composites; Nanostructuration; Hydrothermal Sintering; Low-Temperature Water-Assisted Densification

Domaines: Matériaux

Arnaud Ndayishimiye, Sonia Buffiere, Marie-Anne Dourges, Alain Largeteau, Mythili Prakasam, et al.. Design of 0–3 type nanocomposites using hydrothermal sintering. Scripta Materialia, 2018, 148, pp.15-19. ⟨10.1016/j.scriptamat.2018.01.013⟩. ⟨hal-01708877⟩