Dielectric, pyroelectric and piezoelectric properties in the (1−x)(0.1BaTiO3-0.9NaNbO3)-xLiNbO3 system
BENABDALLAH, Feres
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire des Matériaux Ferroélectriques [LMF]
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Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire des Matériaux Ferroélectriques [LMF]
BENABDALLAH, Feres
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire des Matériaux Ferroélectriques [LMF]
< Réduire
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire des Matériaux Ferroélectriques [LMF]
Langue
en
Article de revue
Ce document a été publié dans
Solid State Sciences. 2012, vol. 14, n° 9, p. 1333-1337
Elsevier
Résumé en anglais
New lead free piezoceramics with the given compositions (1 − x)(0.1BaTiO3-0.9NaNbO3)-xLiNbO3(0.01 ≤ x ≤ 0.125) were prepared by solid-state reaction technique. XRD patterns revealed a single perovskite-structured phase ...Lire la suite >
New lead free piezoceramics with the given compositions (1 − x)(0.1BaTiO3-0.9NaNbO3)-xLiNbO3(0.01 ≤ x ≤ 0.125) were prepared by solid-state reaction technique. XRD patterns revealed a single perovskite-structured phase only for 0.01 ≤ x < 0.05. The dielectric, pyroelectric and piezoelectric responses were investigated for compositions with x = 0.01 and 0.02. For both compositions, ɛ'r exhibited a sharp peak with no frequency dependence (classical ferroelectrics). Losses displayed a strong dispersion at low frequencies in the paraelectric phase which was attributed to Li ionic conductivity in these compositions. The spontaneous polarization was found to be 35 and ≈22 μC cm−2 for x = 0.01 and 0.02 respectively. The transverse piezoelectric coefficient d31 measured for x = 0.01 reached value of 37 pC/N at room temperature while the planar coupling factor was about 0.23.< Réduire
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