title: Supercritical fluid route for synthesizing crystalline Barium Strontium Titanate nanoparticles.
abstract: Pure and well-crystallized Barium Strontium Titanate (BST) nanoparticles with controlled Ba/Sr ratio have been successfully synthesized under supercritical conditions using a continuous-flow reactor in the temperature range of 150-380 degrees C at 26 MPa. To synthesize the Ba0.6Sr0.4TiO3 composition, alkoxides, ethanol and water were used. The resulting nanopowder consists of fine particles with an average particle size of 23 nm. The results show that the Ba/Sr ratio of this powder can be accurately controlled from the composition of precursor. The characterization of the as-synthesized Ba0.6Sr0.4TiO3 solid-solution and the dielectric properties of the sintered ceramics are here reported.
authors.affiliation: Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB-CNRS), Pessac, France.
authors.forename: H
authors.initials: H
authors.lastname: Reverón
authors.forename: C
authors.initials: C
authors.lastname: Elissalde
authors.forename: C
authors.initials: C
authors.lastname: Aymonier
authors.forename: O
authors.initials: O
authors.lastname: Bidault
authors.forename: M
authors.initials: M
authors.lastname: Maglione
authors.forename: F
authors.initials: F
authors.lastname: Cansell
mesh_terms: D017609:Barium Compounds / Q000032:analysis / Q000737:chemistry*; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D004563:Electrochemistry / Q000379:methods; D008280:Magnetics; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods; D043942:Nanotubes / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D009566:Nitrates / Q000032:analysis / Q000737:chemistry*; D010316:Particle Size; D013324:Strontium / Q000032:analysis / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D017609:Barium Compounds; D009566:Nitrates; C104873:strontium nitrate; C023545:barium nitrate; D013324:Strontium