X-ray and dielectric studies of ferroelectric or relaxor phases in the Ca1−xNaxSn1 −xNbxO3 system - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Solid State Sciences Année : 2005

X-ray and dielectric studies of ferroelectric or relaxor phases in the Ca1−xNaxSn1 −xNbxO3 system

Résumé

Ceramics with composition Ca1−xNaxSn1−xNbxO3 (0.85 < x < 0.96) were sintered in the temperature range 1200–1400 °C. Dielectric properties of ceramics belonging to the whole composition domain were investigated in a broad range of temperatures (80–600 K) and frequencies (0.1–200 kHz). The thermal behavior of the dielectric permittivity suggests the existence of three phases: cubic-paraelectric, tetragonal-paraelectric and orthorhombic-ferroelectric or relaxor. The relaxor, or classical ferroelectric character, is dependent on the value of x. The symmetries of these three phases were investigated by X-ray diffraction study. The polarization state was checked by piezoelectric and pyroelectric measurements.

Domaines

Matériaux

Dates et versions

hal-00022223 , version 1 (05-04-2006)

Identifiants

Citer

Abdelhedi Aydi, Hamadi Khemakhem, Chokri Boudaya, Annie Simon, Régnault von Der Mühll. X-ray and dielectric studies of ferroelectric or relaxor phases in the Ca1−xNaxSn1 −xNbxO3 system. Solid State Sciences, 2005, vol. 7, n° 3, p. 249-255. ⟨10.1016/j.solidstatesciences.2004.10.009⟩. ⟨hal-00022223⟩

Collections

CNRS ICMCB
28 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More