Supercritical fluid technology of nanoparticle coating for new ceramic materials.
This work highlights, for the first time, the coating of ferroelectric nanoparticles with a chemical fluid deposition process in supercritical fluids. BaTiO3 nanoparticles of about 50 nm are coated with a shell of a few nanometers of amorphous alumina and can be recovered as a dry powder for processing. The sintering of these core-shell nanoparticles gives access to a ceramic material with very interesting ferroelectric properties, in particular, dielectric losses below 1%.
Aymonier
Cyril
C
Institut de Chimie de la Matière Condensée de Bordeaux 87, Avenue du Dr A. Schweitzer, 33608 Pessac, Cedex, France.
Elissalde
Catherine
C
Reveron
Helen
H
Weill
François
F
Maglione
Mario
M
Cansell
François
F
D000327:Adsorption; D000537:Aluminum Oxide / Q000032:analysis / Q000737:chemistry*; D017609:Barium Compounds / Q000032:analysis / Q000737:chemistry*; D002516:Ceramics / Q000032:analysis / Q000737:chemistry; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D003460:Crystallization / Q000379:methods; D005290:Ferric Compounds / Q000032:analysis / Q000737:chemistry*; D008280:Magnetics; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D014025:Titanium / Q000032:analysis / Q000737:chemistry*
D017609:Barium Compounds; D005290:Ferric Compounds; C024547:barium titanate(IV); C001215:ferrite; D014025:Titanium; D000537:Aluminum Oxide