Ferroelectric, piezoelectric, pyroelectric and Raman spectroscopy studies on BaTi0.9(Fe1/2Nb1/2)0.1O3 ceramic

Z. Abdelkafi (1) , Najmeddine Abdelmoula (1) , Hamadi Khemakhem (1) , Annie Simon (2) , Mario Maglione (2)

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

The hysteresis, piezoelectric and pyroelectric properties were measured in the temperature range near the ferroelectric-paraelectric phase transition. The BaTi0.9(Fe1/2Nb1/2)0.1O3 ceramic exhibits typical ferroelectric P -E hysteresis behavior with a remanant polarization, Pr, of about 7.52 C/cm2 detected at 155 K. The electromechanical properties of this composition were measured using the resonance method. The ceramic provides high piezoelectric performance at the temperature of transition (Tmax = 216 K): the piezoelectric constant is d31 = 140 pC/N and the electromechanical coupling factor was kP = 22%. The pyroelectric study confirms the dielectric and ferroelectric measurements. The pyroelectric coefficient is about 125 nC/cm2 K at Tmax. Raman spectra of BaTi0.9(Fe1/2Nb1/2)0.1O3 ceramic were taken at various temperatures and measured over the wave number range from 150 to 1300 cm-1.

Mots clés: Ceramics; Ferroelectrics; BaTiO; Solid solution

Domaines: Matériaux

Z. Abdelkafi, Najmeddine Abdelmoula, Hamadi Khemakhem, Annie Simon, Mario Maglione. Ferroelectric, piezoelectric, pyroelectric and Raman spectroscopy studies on BaTi0.9(Fe1/2Nb1/2)0.1O3 ceramic. physica status solidi (a), 2008, 205 (12), pp.2948-2952. ⟨10.1002/pssa.200824142⟩. ⟨hal-00350098⟩