EL ALAOUI-BELGHITI, H.; VON DER MÜHLL, Régnault; SIMON, Annie; ELAATMANI, M.; RAVEZ, Jean

doi:10.1016/S0167-577X(01)00636-X

Metadatos

Licencia de uso del documento

EL ALAOUI-BELGHITI, H.
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire de Chimie du Solide Minéral

VON DER MÜHLL, Régnault
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

SIMON, Annie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

Idioma

Article de revue

Este ítem está publicado en

Materials Letters. 2002, vol. 55, n° 3, p. 138-144

Elsevier

Resumen en inglés

By partial cationic and anionic substitutions in NaNbO3-SrNb2O6 and KNbO3-SrNb2O6 systems, two solid solutions have been obtained: Sr2−xNa1+xNb5O15−xFx and Sr2−xK1+xNb5O15−xFx. They crystallize in the tetragonal tungsten bronze (TTB) type structure, which is related to that of the perovskite. The replacement of oxygen by fluorine causes a decrease of the Curie temperature. A weak F-O substitution rate increases the compactness, which leads to higher dielectric constant with good piezoelectric and pyroelectric characteristics. A relatively higher F-O substitution rate induces aferroelectricrelaxorbehavior. Such relaxorferroelectricceramics with lead-free compositions can be of great interest for environment-friendly applications.< Leer menos

Palabras clave en inglés

Disorder

Relaxor

TTB

Ceramics

Metadatos

Licencia de uso del documento

Relaxor or classical ferroelectric behavior in ceramics with composition Sr2-xA1+xNb5O15-xFx (A = Na, K)

Idioma

Este ítem está publicado en

Resumen en inglés

Palabras clave en inglés

DOI

Orígen

Centros de investigación