# High temperature lead-free relaxor ferroelectric: Intergrowth Aurivillius phase BaBi2Nb2O9—Bi4Ti3O12 ceramics

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Domain engineered <001> oriented relaxor-PbTiO3 ferroelectric crystals exhibit high electromechanical properties and low mechanical Q values, analogous to â€œsoftâ€ piezoelectric ceramics. However, their characteristic low dielectric loss (â‰¤0.5%) and strain-electric field...

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Temperature dependence of the complex effective piezoelectric coefficient d[sup *, sub 3l] for a ferroelectric 0-3 composite of small ceramic volume fraction has been studied. Theoretical predictions are based on our previously derived explicit expression of d[sub 31] for a dilute dispersion of...

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Piezoelectric 1-3 composites are typically prepared from a polymer matrix and an unpoled Pb(Zr[sub x]Ti[sub 1-x])O[sub 3] (PZT) based ceramic. During the subsequent poling process the PZT cannot strain freely due to the clamping by the surrounding polymer, which after poling results in the...

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Mobility of ferroelectric domain walls is a critical factor in the fatigue of piezoelectric ceramics. Here, reversible and irreversible domain wall motion is evaluated for lead-zirconate-titanate both before and after fatigue cycling. To this end, the small-signal permittivity at different...

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Piezoelectric materials is a kind of the most common smart materials whose geometric shape can be related to an energy input in the form of electric field. In the application of active materials to electromechanical energy conversion, electrical energy may be input to the material and the...

- Phase transitions, relaxor behavior, and large strain response in LiNbO3-modified Bi0.5(Na0.80K0.20)0.5TiO3 lead-free piezoceramics. Hao, Jigong; Bai, Wangfeng; Li, Wei; Shen, Bo; Zhai, Jiwei // Journal of Applied Physics;Jul2013, Vol. 114 Issue 4, p044103
The effect of LiNbO3 (LN) addition on the ferroelectric behavior and piezoelectric properties of Bi0.5(Na0.80K0.20)0.5TiO3 (BNKT20) lead-free piezoceramics were systematically investigated. Results showed that the LN substitution into BNKT20 induced a transition from coexistence of ferroelectric...