ABDELKAFI, Z.; ABDELMOULA, Najmeddine; KHEMAKHEM, Hamadi; SIMON, Annie; MAGLIONE, Mario

doi:10.1002/pssa.200824142

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ABDELKAFI, Z.
Laboratoire des Matériaux Ferroélectriques [LMF]

ABDELMOULA, Najmeddine
Laboratoire des Matériaux Ferroélectriques [LMF]

KHEMAKHEM, Hamadi
Laboratoire des Matériaux Ferroélectriques [LMF]

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physica status solidi (a). 2008, vol. 205, n° 12, p. 2948-2952

Wiley

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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.< Leer menos

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Ceramics

Ferroelectrics

BaTiO

Solid solution

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