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Sokolowski, M.
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Publications (2/2 displayed)
- 2022Effects of Sr dopant and electric field poling on structural, thermal and dielectric properties of Ba<SUB>1-x </SUB>Sr <SUB>x</SUB> TiO<SUB>3</SUB> ceramics (x = 0, 0.3, 0.4 and 0.45)citations
- 2018Influence of sintering conditions on structural, thermal, electric and ferroelectric properties of Na<SUB>0.5</SUB>Bi<SUB>0.5</SUB>TiO<SUB>3</SUB> ceramicscitations
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article
Effects of Sr dopant and electric field poling on structural, thermal and dielectric properties of Ba<SUB>1-x </SUB>Sr <SUB>x</SUB> TiO<SUB>3</SUB> ceramics (x = 0, 0.3, 0.4 and 0.45)
Abstract
The behavior of Ba<SUB>1-x </SUB>Sr <SUB>x</SUB> TiO<SUB>3</SUB> ceramics (x = 0, 0.3, 0.4 and 0.45) in both unpoled and poled states was studied using XRD, SEM, DSC and dielectric methods. The ceramics exhibit pure perovskite structure with tetragonal symmetry for x = 0, 0.3 and 0.4 and pseudocubic for x = 0.45. It was found that the substitution of SrTiO<SUB>3</SUB> to BaTiO<SUB>3</SUB> significantly influences the properties under investigation, leading to a shift of phase transitions and weakness of the dielectric and ferroelectric properties. This suggests that the effects are mainly due to the differences in ionic size between dopant and host ions and to the more covalent nature of the A-O bond following Sr<SUP>2+</SUP> addition and that the former effect is predominant. It was shown that prior electric field poling decreases the disorder introduced by Sr modification through reinforced domains/polar regions ordering....