Gilles Philippot

Marjorie Albino

U-Chan Chung

Michaël Josse

Catherine Elissalde

Mario Maglione

Cyril Aymonier

à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés

Keywords: Barium titanate zirconate (BTZ), Supercritical fluid, Nanocrystal, Nanostructured ceramic, Lead free, Ferroelectric, Relaxor

This paper addresses for the first time two of the main challenges in the field of electroceramics. The first one is the development of a continuous, fast and reliable synthesis method for producing sub-20 nm barium titanate zirconate (BaTi1-yZryO3 with 0 ≤ y ≤ 1-BTZ) nanocrystals over the whole solid solution, while keeping a narrow size distribution. The second one concerns the processing of dense and nanostructured lead free electroceramics highlighting the size effect on the crossover from ferroelectric to relaxor, in the case of grains smaller than 100 nm. This was achieved combining the supercritical fluid technology to produce in continuous and at moderate temperature (400 °C) BTZ nanocrystals, with Spark Plasma Sintering (SPS) to prevent grain growth during the sintering.

Continuous BaTi 1 -y Zr y O 3 (0 ≤ y ≤ 1) nanocrystals synthesis in supercritical fluids for nanostructured lead-free ferroelectric ceramics

  Gilles Philippot, Marjorie Albino, U-Chan Chung, Michaël Josse, CatherineElissalde, Mario Maglione, Cyril AymonierTo cite this version:Gilles Philippot, Marjorie Albino, U-Chan Chung, Michaël Josse, Catherine Elissalde, et al.. Continuous BaTi1-yZryO3 (0≤y≤1) nanocrystals synthesis in supercritical fluids for nanostructured lead-free ferroelectric ceramics.Materials & Design, 2015, 86, pp.354-360. 10.1016/j.matdes.2015.07.111. hal-01193031