The ferroelectric transition temperature as an intrinsic probe for sintered nanocrystalline BaTiO3 synthesized under supercritical conditions
Idioma
en
Article de revue
Este ítem está publicado en
Nanotechnology. 2005, vol. 16, n° 6, p. 797–802
Institute of Physics
Resumen en inglés
We have investigated the sintering behaviour of cubic BaTiO3 nanoparticles obtained under supercritical conditions. The ferroelectric properties of samples sintered between 950 and 1300 °C were measured from room temperature ...Leer más >
We have investigated the sintering behaviour of cubic BaTiO3 nanoparticles obtained under supercritical conditions. The ferroelectric properties of samples sintered between 950 and 1300 °C were measured from room temperature up to 200 °C and in the frequency range 100 Hz–10 kHz. The influence of the initial powder characteristics on the microstructure and dielectric properties of ceramics have been investigated. The ferroelectric transition temperature was used as an intrinsic probe for the ceramic characterization and was then found to be dependent on the Ba:Ti ratio of the initial powder. Understanding the role of the key parameters at different scales (bulk and nanoscale composition, tetragonal distortion, microstructure) on the permittivity, losses and transition temperature would lead to a possible modulation of ferroelectric properties.< Leer menos
Palabras clave en inglés
Microstructure
Sintering
Stoichiometry
Synthesis (chemical)
Transmission electron microscopy
X ray diffraction analysis
Atomic spectroscopy
Barium titanate
Crystallization
Dielectric properties
Emission spectroscopy
Ferroelectricity
Inductively coupled plasma
Orígen
Importado de HalCentros de investigación