High-performance piezoelectric (K,Na,Li)(Nb,Ta,Sb)O3 single crystals by oxygen annealing

Liu, Hairui; Veber, Philippe; Rödel, Jürgen; Rytz, Daniel; Fabritchnyi, P.B.; Afanasov, M. I.; Patterson, Eric A.; Frömling, Till; Maglione, Mario; Koruza, Jurij

doi:10.1016/j.actamat.2018.02.026

Cited by 47 publications

(28 citation statements)

References 58 publications

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“…BCTZ4 polycrystal displayed a high d33= 496pC.N -1 similar to that of ceramics with close compositions 10,32 . Although piezoelectric coefficients d33 are higher than those previously reported in lead-free BCTZ single crystals 13,39,40 , they remain below the predicted ones 10 and those of other lead-free systems 9,[41][42][43] . This feature is mainly due to the fact that BCTZ polycrystals exhibit averaged properties compared to those of single crystals.…”

Section: Dielectric and Electromechanical Characterizationmentioning

confidence: 62%

Spinodal Decomposition in Lead-free Piezoelectric BaTiO₃–CaTiO₃–BaZrO₃ Crystals

Buşe

Cong

Marchet

et al. 2018

Crystal Growth & Design

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Polycrystals and centimeter-sized BaTiO3-based single crystals were grown by top seeded solution growth from the BaTiO3-CaTiO3-BaZrO3 system. High effective partition coefficients of Zr ranging from 15 to 6 with small Zr content have been calculated from Castaing micro-probe measurements whereas those of Ca increase slightly from 0.45 to 0.7. A spinodal decomposition mechanism is emphasized during the growth leading to the emergence of two phases with close compositions. Chemical analysis displayed periodical Zr and Ca contents fluctuations within the whole boules and Rietveld measurements highlighted two phases belonging to perovskite structures with tetragonal P4mm and orthorhombic Amm2 space groups. Samples with various calcium and zirconium contents were characterized by means of dielectric and piezoelectric measurements. Most efficient samples are indistinctly polycrystals or oriented single crystals where electromechanical performances are compositional-dependent. Polycrystalline samples and single crystals oriented along (001)pc and (110)pc displayed Curie temperatures ranging from 50°C to 111°C. Electromechanical coupling factor up to 58% and piezoelectric charge coefficient d33=496 pC.N-1 were obtained at room temperature. The miscibility gap between the two perovskite solid solutions as well as Ca and Zr elements content variation in single

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Section: Dielectric and Electromechanical Characterizationmentioning

confidence: 62%

Spinodal Decomposition in Lead-free Piezoelectric BaTiO₃–CaTiO₃–BaZrO₃ Crystals

Buşe

Cong

Marchet

et al. 2018

Crystal Growth & Design

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“…Perovskites with general formula ABO 3 are an important family of multifunctional materials [1] and exhibit a broad variety of outstanding properties, which are widely used in various technological applications such as Solid Oxide Fuel Cells (SOFC) [2,3], steam electrolysis [4], substrates for multiferroic materials [5,6], piezoelectricity [7][8][9][10][11][12][13] or catalysis [14][15][16]. Among different perovskite compounds, barium zirconate BaZrO 3 (BZO) has attracted renewed interests as a high-temperature proton conductor [17], a dielectric material for wireless communication applications [18], a substrate for thin-film growth [19,20] and as an inert crucible for superconductors crystal growth [21].…”

Section: Introductionmentioning

confidence: 99%

Single crystal growth of BaZrO₃ from the melt at 2700 °C using optical floating zone technique and growth prospects from BaB₂O₄ flux at 1350 °C

et al. 2019

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We report the growth of BaZrO 3 single crystals by the optical floating zone technique and the investigation on its flux growth using BaB 2 O 4 as a solvent. 6-mm long colorless and transparent single crystals were obtained with a mirror furnace without the need for post-treatment annealing.Its properties are determined and compared with those of two commercial crystals grown by the tri-arc Czochralski method. The chemical composition was investigated using glow discharge mass spectrometry (GDMS) and secondary ion mass spectrometry (SIMS), which indicate minor impurities of Sr, Hf, Ca and Ti, with maximal concentrations for Sr and Hf in the range of 0.3-0.5 % at. The optical band gap determined by UV-visible spectroscopy is found to be ~4.8 eV and Page 1 of 25 CrystEngComm 2indicates the high quality of the BaZrO 3 crystals grown by the optical floating zone technique.Raman spectroscopy at ambient conditions and at low temperatures down to 4.2 K reveals a relatively sharp second-order spectrum and does not reveal any structural phase transition.

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“…Another difference between the two modes is variant selection of the phase transition. There are quantities of discussions on the variant selection of γ-ε-α' phase transition in various TRIP steels [41,42], but systematically studies on the variant selections of the phase transition under dynamic loadings are few. Through NEMD simulations on phase transition of both single and nano-/ crystalline iron under shock compressions [28,40], we found that the variant selection rules of SAT and SIT satisfy strain work criterion and Schmid factor criterion, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The critical point for the strain work criterion is the definition of stresses used for calculating the strain (or transformation) work. Experimentally, applied stress is usually employed for calculations of the strain (or transformation) work by assuming that local stresses are uniform and equal to the applied stress [41,42]. In NEMD simulations, the assumption also works well for variant selections of the phase transition of single crystalline iron under shock compressions [28] where local stresses are extremely nonuniform.…”

Section: Introductionmentioning

confidence: 99%

Interactions between coherent twin boundaries and phase transition of iron under dynamic loading and unloading

Wang

Chen

Zhang

et al. 2017

Journal of Applied Physics

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Under high pressures, phase transition, as well as deformation twins, are constantly reported in many BCC metals, whose interactions are of fundamental importance to understand strengthen mechanism of these metals under extreme conditions. However, the interactions between twins and phase transition in BCC metals are remain largely unexplored. In this work, interactions between coherent twin boundaries and α↔ε phase transition of iron are investigated using both non-equilibrium molecular dynamics simulations and nudge elastic band method. Mechanisms of both twin-assisted phase transition and reverse phase transition are studied and orientation relationships between BCC and HCP phase are found to be 〈111 ̅ 〉 ||〈1 ̅ 21 ̅ 0〉 and 〈11 ̅ 0〉 ||〈0001〉 for both cases. The twin boundary corresponds to *101 ̅ 0+ after the phase transition. It is amazing that the reverse transition seems to be able to "memory" and recover the initial BCC twins. The memory would partly loss when plastic slips take place in the HCP phase before the reverse transition. In the recovered initial BCC twins, three major twin spacing are observed, which are well explained in terms of energy barriers of the transition from HCP phase to BCC twin. Besides, variant selection rule of the twin assisted phase transition is also discussed. The results of present work could be expected to give some clues for producing ultra-fine grain structure in materials exhibiting martensitic phase transition.

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High-performance piezoelectric (K,Na,Li)(Nb,Ta,Sb)O3 single crystals by oxygen annealing

Cited by 47 publications

References 58 publications

Spinodal Decomposition in Lead-free Piezoelectric BaTiO₃–CaTiO₃–BaZrO₃ Crystals

Spinodal Decomposition in Lead-free Piezoelectric BaTiO₃–CaTiO₃–BaZrO₃ Crystals

Single crystal growth of BaZrO₃ from the melt at 2700 °C using optical floating zone technique and growth prospects from BaB₂O₄ flux at 1350 °C

Interactions between coherent twin boundaries and phase transition of iron under dynamic loading and unloading

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High-performance piezoelectric (K,Na,Li)(Nb,Ta,Sb)O3 single crystals by oxygen annealing

Cited by 47 publications

References 58 publications

Spinodal Decomposition in Lead-free Piezoelectric BaTiO3–CaTiO3–BaZrO3 Crystals

Spinodal Decomposition in Lead-free Piezoelectric BaTiO3–CaTiO3–BaZrO3 Crystals

Single crystal growth of BaZrO3 from the melt at 2700 °C using optical floating zone technique and growth prospects from BaB2O4 flux at 1350 °C

Interactions between coherent twin boundaries and phase transition of iron under dynamic loading and unloading

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Spinodal Decomposition in Lead-free Piezoelectric BaTiO₃–CaTiO₃–BaZrO₃ Crystals

Spinodal Decomposition in Lead-free Piezoelectric BaTiO₃–CaTiO₃–BaZrO₃ Crystals

Single crystal growth of BaZrO₃ from the melt at 2700 °C using optical floating zone technique and growth prospects from BaB₂O₄ flux at 1350 °C