Aging in the relaxor and ferroelectric state of Fe-doped (1-x)(Bi1/2Na1/2)TiO3-xBaTiO3 piezoelectric ceramics

Sapper, Eva; Dittmer, Robert; Damjanović, Dragan; Erdem, Emre; Keeble, D. J.; Jo, Wook; Granzow, Torsten; Rödel, Jürgen

doi:10.1063/1.4894630

Cited by 59 publications

(40 citation statements)

References 52 publications

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“…The bismuth nonstoichiometry in NBT–6BT investigated for example by Seo et al is not high enough to induce high ionic conductivity. Similarly, it was possible for Sapper et al to investigate ferroelectric hardening in 1 mol% Fe doped NBT–6BT. The similarity in variation in structure, phase, and microstructure with Fe doped between NBT and NBT–6BT ceramics suggests the decrease in sensitivity of the conductivity to oxygen vacancies for NBT–6BT may be due to the A‐site ion differences.…”

Section: Resultsmentioning

confidence: 99%

“…However, Prasertpalichat et al provided evidence of high ionic conductivity in off‐stoichiometric NBT–BT. Nevertheless, Sapper et al even reported that ferroelectric hardening in NBT–6BT is possible by a B‐site Fe acceptor doping. It has also been shown that A‐site acceptor doping introduced by A‐site nonstoichiometry can induce hardening .…”

Section: Introductionmentioning

confidence: 99%

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The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃

et al. 2019

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Na1/2Bi1/2TiO3 (NBT) based ceramics are amongst the most promising lead‐free ferroelectric materials. It was expected that the defect chemistry and the effect of doping of NBT would be similar to that observed for lead based materials, however, acceptor doping does not lead to ferroelectric hardening. Instead, high oxygen ionic conductivity is induced. Nevertheless, for solid solutions with BaTiO3 (BT), which are more relevant with respect to ferroelectric applications, such a drastic change of electrical properties has not been observed so far. To rationalize the difference in defect chemistry between NBT and its solid solution 94(Na1/2Bi1/2TiO3)–0.06 BaTiO3 (NBT–6BT) compositions with different concentrations of Fe‐dopant were investigated. The study illustrates that the materials exhibit very similar behavior to NBT, and extraordinarily high oxygen ionic conductivity could also be induced in NBT–6BT. The key difference between NBT–6BT and NBT is the range of the dependence of ionic conductivity with dopant concentration. Previous studies of NBT–6BT have not reached sufficiently high dopant concentrations to observe high conductivity. In consequence, the same defect chemical model can be applied to both NBT and its solid solutions. This will help to rationalize the effect of doping on ferroelectric properties of NBT‐ceramics and defect chemistry related degradation and fatigue.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃

et al. 2019

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“…A distortion of the lattice occurs by jumps of the oxygen vacancies toward the orientation with the lowest energy. Thus, an internal bias field E int is observed . This internal bias field is measured to be 835 V mm −1 for the loop recorded for BaTi 0.9925 Co 0.0075 O 3 , 1 mol%Li 2 O ceramics.…”

Section: Resultsmentioning

confidence: 84%

Improved Properties of Doped BaTiO₃ Piezoelectric Ceramics

Marchet

Pham‐Thi

et al. 2019

Physica Status Solidi (a)

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À δ lead-free piezoelectric ceramics are prepared using solid-state reactions. The use of a Li 2 O sintering aid enables one to obtain dense ceramics at a temperature of 1100 C instead of the 1350 C used for BaTiO 3 (BT) in conventional sintering. X-ray diffraction (XRD) data indicate structural modifications, suggesting insertion of the doping elements into the tetragonal structure. The insertion of Li/Ca/Co/Nb improves piezoelectric properties: for micrograin-size ceramics, a piezoelectric charge constant and an electromechanical coupling factor of d 33 ¼ 255 pC N À1 and k p ¼ 43.5% are reached, respectively. Furthermore, a thermal annealing of the cobalt-doped sample at 1080 C under O 2 atmosphere leads to d 33 ¼ 280 pC N À1 and k p ¼ 44.6%. BaTiO 3 :Co ceramics present distorted ferroelectric cycles due to the occurrence of an internal bias field. The high mechanical quality factors (Q m > 1000) obtained for the doped BT ceramics afford stability against electrical stress of up to 500 V RMS mm À1 , which makes these materials competitive with PZT4 for some applications.

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“…Aging effect in ferroelectrics means a gradual change of the dielectric, piezoelectric, and ferroelectric properties with time. [1][2][3] Usually, for poled acceptor-doped ferroelectrics, aging leads to decrease of piezoelectric coefficient and switchable polarization, but an increase of mechanical quality. 4 Aging effects in ferroelectrics have being intensively studied, and are ascribed to boundary effect 5 or volume effect.…”

Section: Introductionmentioning

confidence: 99%

Aging effect in Er³⁺‐doped 0.5Ba(Zr_0.2Ti_0.8)O₃–0.5(Ba_0.7Ca_0.3)TiO₃ ceramics

Luo

et al. 2019

J Am Ceram Soc

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Usually, aging in poled ferroelectrics leads to degradation of certain physical properties. In this study, we found a remarkable aging effect in tetragonal Er3+‐doped 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 (BZT‐BCT) ceramics after poling. It is observed that the domains can spontaneously rotate to keep their spontaneous polarization direction similar to that of the poling electric field during aging for the poled ceramics. Furthermore, compared with freshly poled ceramics, the thermally stimulated current (TSC) peak of the aged ones shifts toward a higher temperature (10°C). And the temperature of the TSC peak in the aged ceramics is exactly equal to their Curie temperature. Such features indicate that aging for the poled ceramics could stabilize the alignment of ordered ferroelectric domains. Additionally, a downward TSC peak above Curie temperature is obtained in both poled and aged ceramics, demonstrating that poling and aging can lead to ordered alignment of defect dipoles. The aging mechanism of poled Er3+‐doped BZT‐BCT ceramics has proposed and discussed in this article.

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Aging in the relaxor and ferroelectric state of Fe-doped (1-x)(Bi1/2Na1/2)TiO3-xBaTiO3 piezoelectric ceramics

Abstract: Articles you may be interested inEffect of uniaxial stress on ferroelectric behavior of ( Bi 1 / 2 Na 1 / 2 ) TiO 3 -based lead-free piezoelectric ceramics

Cited by 59 publications

References 52 publications

The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃

The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃

Improved Properties of Doped BaTiO₃ Piezoelectric Ceramics

Aging effect in Er³⁺‐doped 0.5Ba(Zr_0.2Ti_0.8)O₃–0.5(Ba_0.7Ca_0.3)TiO₃ ceramics

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Aging in the relaxor and ferroelectric state of Fe-doped (1-x)(Bi1/2Na1/2)TiO3-xBaTiO3 piezoelectric ceramics

Abstract: Articles you may be interested inEffect of uniaxial stress on ferroelectric behavior of ( Bi 1 / 2 Na 1 / 2 ) TiO 3 -based lead-free piezoelectric ceramics

Cited by 59 publications

References 52 publications

The effect of Fe‐acceptor doping on the electrical properties of Na1/2Bi1/2TiO3 and 0.94 (Na1/2Bi1/2)TiO3–0.06 BaTiO3

The effect of Fe‐acceptor doping on the electrical properties of Na1/2Bi1/2TiO3 and 0.94 (Na1/2Bi1/2)TiO3–0.06 BaTiO3

Improved Properties of Doped BaTiO3 Piezoelectric Ceramics

Aging effect in Er3+‐doped 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 ceramics

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The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃

The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃

Improved Properties of Doped BaTiO₃ Piezoelectric Ceramics

Aging effect in Er³⁺‐doped 0.5Ba(Zr_0.2Ti_0.8)O₃–0.5(Ba_0.7Ca_0.3)TiO₃ ceramics