X-ray diffraction, dielectric measurements and Raman spectroscopy Studies of the (1 − x)CaSnO3 − x NaNbO3 solid solution

Abdelhedi Aydi (1, 2) , Souad Chkoundali (2) , Hamadi Khemakhem (2) , Annie Simon (1) , Régnault von Der Mühll (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 LMF - Laboratoire des Matériaux Ferroélectriques

Compounds in the pseudo-binary CaSnO3/NaNbO3 system have been synthesized at 1350 °C in oxygen air. This sample was characterized by X-ray diffraction as well as dielectric measurements and Raman spectroscopy. Using the Rietveld refinement powder X-ray diffraction the crystal structure of CaSnO3/NaNbO3 was found at room temperature. These compounds crystallize at room temperature in tetragonal space group P4mm for x = 0.925 and in cubic group Pm3m for x = 0.895. The evolution of the Raman spectra was studied as a function of various compositions at room temperature.

Mots clés: Ceramic; Ferroelectric; Relaxor; Dielectric; X-ray diffraction; Permittivity

Domaines: Matériaux

Abdelhedi Aydi, Souad Chkoundali, Hamadi Khemakhem, Annie Simon, Régnault von Der Mühll. X-ray diffraction, dielectric measurements and Raman spectroscopy Studies of the (1 − x)CaSnO3 − x NaNbO3 solid solution. Journal of Alloys and Compounds, 2008, 465 (1-2), pp.222-226. ⟨10.1016/j.jallcom.2007.10.108⟩. ⟨hal-00319960⟩