SIMON, Annie; RAVEZ, Jean

doi:10.1142/S2010135X11000240

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SIMON, Annie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

RAVEZ, Jean
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Advanced Dielectrics. 2011, vol. 1, n° 2, p. 251-255

Résumé en anglais

New lead-free compositions of AMO3 perovskite type were synthesized in the BaTi1-x(Nb1/2Sc1/2)xO3(0 ≤ x ≤ 1) system, with regards to the comparable electronic configurations of the various 6-coordinated cations. Special solid state reaction was used. The effect of the replacement of titanium by scandium and niobium in the B-site on structural and dielectric properties was investigated. For this, we have used X-ray diffraction and dielectric characterizations. Dielectric measurements performed on ceramics with 0 ≤ x ≤ 0.25 composition revealed that the small change in composition from BaTiO3 has a strong influence on the dielectric properties: fast decreasing of the ferroelectric transition temperature for low values of x and evolution from classical ferroelectric for 0 ≤ x ≤ 0.075 to relaxor behavior for 0.075 < x ≤ 0.25.< Réduire

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Lead-free

Perovskite

Relaxor

BaTiO3

Scandium

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New lead-free perovskite relaxor ceramics derived from BaTiO<sub>3</sub> and containing scandium

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