New lead-free perovskite relaxor ceramics derived from BaTiO<sub>3</sub> and containing scandium
Language
en
Article de revue
This item was published in
Journal of Advanced Dielectrics. 2011, vol. 1, n° 2, p. 251-255
English Abstract
New lead-free compositions of AMO<sub>3</sub> perovskite type were synthesized in the BaTi<sub>1-x</sub>(Nb<sub>1/2</sub>Sc<sub>1/2</sub>)<sub>x</sub>O<sub>3</sub>(0 ≤ x ≤ 1) system, with regards to the comparable electronic ...Read more >
New lead-free compositions of AMO<sub>3</sub> perovskite type were synthesized in the BaTi<sub>1-x</sub>(Nb<sub>1/2</sub>Sc<sub>1/2</sub>)<sub>x</sub>O<sub>3</sub>(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 BaTiO<sub>3</sub> 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.Read less <
English Keywords
Lead-free
Perovskite
Relaxor
BaTiO3
Scandium
Origin
Hal imported