Giant strain in Nb-doped Bi0.5(Na0.82K0.18)0.5TiO3 lead-free electromechanical ceramics

Pham, Ky-Nam; Hussain, Ali; Ahn, Chang Won; Kim, Iii Won; Jeong, Soon‐Jong; Lee, Jae‐Shin

doi:10.1016/j.matlet.2010.07.048

Cited by 202 publications

(103 citation statements)

References 18 publications

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“…shows two linear regions for BNKTTa-2 ceramics that revealed the highest strain in this work, similar to Nb-doped BNKT [22]. At low electric fields (E < 4 kV/mm), the electrostrictive constant sition from a piezoelectric to a nonpolar electrostrictive phase as the content of Ta increases.…”

Section: S = D 33 Esupporting

confidence: 64%

Effect of Ta-Substitution on the Ferroelectric and Piezoelectric Properties of Bi_0.5/(Na_0.82K_0.18)_0.5TiO₃Ceramics

Do¹,

Lee²,

Yoon³

et al. 2011

Transactions on Electrical and Electronic Materials

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The effect of Ta substitution on the crystal structure, ferroelectric, and piezoelectric properties of Bi 0.5 (Na 0.82 K 0.18 ) 0.5 Ti 1-x Ta x O 3 ceramics has been investigated. The Ta doping resulted in a transition from coexistence of ferroelectric tetragonal and rhombohedral phases to an electrostrictive pseudocubic phase, leading to degradations of the remnant polarization, coercive field, and piezoelectric coefficient d 33 . However, the electricfield-induced strain was significantly enhanced by the Ta substitution-induced phase transition and reached a highest value of S max /E max = 566 pm/V under an applied electric field 6 kV/mm when 2% Ta was substituted on Ti sites. The abnormal enhancement in strain was attributed to the pseudocubic phase with high electrostrictive constants.

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Section: S = D 33 Esupporting

confidence: 64%

Effect of Ta-Substitution on the Ferroelectric and Piezoelectric Properties of Bi_0.5/(Na_0.82K_0.18)_0.5TiO₃Ceramics

Do¹,

Lee²,

Yoon³

et al. 2011

Transactions on Electrical and Electronic Materials

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“…Several other BNT-based compositions with large strain have been reported by different authors. [12][13][14] Interestingly, among all these compositions the strain is generated via an electric-field-induced reversible transition between pseudocubic relaxor (RE) and non-cubic ferroelectric phases at relatively high fields (!4 kV/mm). [15][16][17][18] Further improvement of actuator properties with such compositions will require the lowering of the actuating field.…”

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confidence: 99%

Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach

Khansur

Groh

et al. 2014

Journal of Applied Physics

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Local structure change evidenced by temperature-dependent elastic measurements: Case study on Bi1/2Na1/2TiO3-based lead-free relaxor piezoceramics J. Appl. Phys. 115, 084108 (2014) Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach The electric-field-induced strain response mechanism in a polycrystalline ceramic/ceramic composite of relaxor and ferroelectric materials has been studied using in situ high-energy x-ray diffraction. The addition of ferroelectric phase material in the relaxor matrix has produced a system where a small volume fraction behaves independently of the bulk under an applied electric field. Inter-and intra-grain models of the strain mechanism in the composite material consistent with the diffraction data have been proposed. The results show that such ceramic/ceramic composite microstructure has the potential for tailoring properties of future piezoelectric materials over a wider range than is possible in uniform compositions. V C 2014 AIP Publishing LLC.

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“…23 The contribution of Nb to the high electrostrain lies in its donor dopant nature, suppressing oxygen vacancy formation and transforming the mixed rhombohedral and tetragonal phases into a pseudocubic relaxor phase. 24 Through finely tuning the composition and optimizing the thermal processing conditions on the same solid solution system, an extremely high strain of 0.70% at 50 kV/cm in {[Bi 1/2 (Na 0.84 K 0. 16 25 The electrostrain and d 33 * observed in this conventionally sintered, non-textured polycrystalline ceramic are comparable even with lead-free single crystals.…”

mentioning

confidence: 99%

Giant strain with low cycling degradation in Ta-doped [Bi1/2(Na0.8K0.2)1/2]TiO3 lead-free ceramics

Liu

Tan

2016

Journal of Applied Physics

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Articles you may be interested inHierarchical domain structure of lead-free piezoelectric (Na1/2 Bi1/2)TiO3-(K1/2 Bi1/2)TiO3 single crystals J. Appl. Phys. 119, 174102 (2016); 10.1063/1.4948478Phase structure and piezoelectric properties of (1−x)K0.48Na0.52Nb0.95Sb0.05O3-x(Bi0.5Na0.5)0.9(Li0.5Ce0.5)0.1ZrO3 lead-free piezoelectric ceramics J. Appl. Phys. 119, 034101 (2016) . These values are greater than most previously reported lead-free polycrystalline ceramics and can even be compared with some lead-free piezoelectric single crystals. Additionally, this ceramic displays low cycling degradation; its electrostrain remains above 0.55% even after undergoing 10 000 cycles of 650 kV/cm bipolar fields at 2 Hz. Therefore, Ta-doped [Bi 1/2 (Na 0.8 K 0.2 ) 1/2 ]TiO 3 ceramics show great potential for large displacement devices. Published by AIP Publishing.

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Giant strain in Nb-doped Bi0.5(Na0.82K0.18)0.5TiO3 lead-free electromechanical ceramics

Cited by 202 publications

References 18 publications

Effect of Ta-Substitution on the Ferroelectric and Piezoelectric Properties of Bi_0.5/(Na_0.82K_0.18)_0.5TiO₃Ceramics

Effect of Ta-Substitution on the Ferroelectric and Piezoelectric Properties of Bi_0.5/(Na_0.82K_0.18)_0.5TiO₃Ceramics

Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach

Giant strain with low cycling degradation in Ta-doped [Bi1/2(Na0.8K0.2)1/2]TiO3 lead-free ceramics

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Giant strain in Nb-doped Bi0.5(Na0.82K0.18)0.5TiO3 lead-free electromechanical ceramics

Cited by 202 publications

References 18 publications

Effect of Ta-Substitution on the Ferroelectric and Piezoelectric Properties of Bi0.5/(Na0.82K0.18)0.5TiO3Ceramics

Effect of Ta-Substitution on the Ferroelectric and Piezoelectric Properties of Bi0.5/(Na0.82K0.18)0.5TiO3Ceramics

Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach

Giant strain with low cycling degradation in Ta-doped [Bi1/2(Na0.8K0.2)1/2]TiO3 lead-free ceramics

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Effect of Ta-Substitution on the Ferroelectric and Piezoelectric Properties of Bi_0.5/(Na_0.82K_0.18)_0.5TiO₃Ceramics

Effect of Ta-Substitution on the Ferroelectric and Piezoelectric Properties of Bi_0.5/(Na_0.82K_0.18)_0.5TiO₃Ceramics