Cyclic electric field response of morphotropic Bi1/2Na1/2TiO3-BaTiO3 piezoceramics

Hinterstein, Manuel; Schmitt, Ljubomira Ana; Hoelzel, Markus; Jo, Wook; Rödel, Jürgen; Kleebe, Hans‐Joachim; Hoffman, Mark

doi:10.1063/1.4922145

Cited by 55 publications

(48 citation statements)

References 34 publications

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“…The development of diffraction experiments under in-situ application of electric fields to ceramic specimens at synchrotron radiation facilities has expanded considerably in the last decade [56,57,58,59,60,61,62,63,64,65,66,67,68]. In the literature, one can find a diversity of configurations regarding the relative orientation of the electric field (E) and the diffraction vectors k 0 (incident), k (diffracted) and Q (scattering) = k – k 0 .…”

Section: X-ray Diffraction and Scatteringmentioning

confidence: 99%

“…( a ) One-dimensional diffraction, symmetric reflection (θ–2θ) with applied electric field perpendicular to sample surface; ( b ) Transmission setup with control of the angle between scattering vector Q and field E [69]. The condition ω = 90° represents the case of electric field parallel to the incident beam [68]; ( c ) Generic two-dimensional (2D) detection of diffracted/scattered X-rays. Characteristic directions and angles in the 2D experiment are represented.…”

Section: X-ray Diffraction and Scatteringmentioning

confidence: 99%

“…Diverse variants to the Ma, et al representation have been published [15,19,68,70,83,111]. In the following, we revisit the 0.04 < x < 0.07 interval.…”

Section: Case Study: the Bnbt Systemmentioning

confidence: 99%

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Ferroelectrics under the Synchrotron Light: A Review

et al. 2015

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Currently, an intensive search for high-performance lead-free ferroelectric materials is taking place. ABO3 perovskites (A = Ba, Bi, Ca, K and Na; B = Fe, Nb, Ti, and Zr) appear as promising candidates. Understanding the structure–function relationship is mandatory, and, in this field, the roles of long- and short-range crystal orders and interactions are decisive. In this review, recent advances in the global and local characterization of ferroelectric materials by synchrotron light diffraction, scattering and absorption are analyzed. Single- and poly-crystal synchrotron diffraction studies allow high-resolution investigations regarding the long-range average position of ions and subtle global symmetry break-downs. Ferroelectric materials, under the action of electric fields, undergo crystal symmetry, crystallite/domain orientation distribution and strain condition transformations. Methodological aspects of monitoring these processes are discussed. Two-dimensional diffraction clarify larger scale ordering: polycrystal texture is measured from the intensities distribution along the Debye rings. Local order is investigated by diffuse scattering (DS) and X-ray absorption fine structure (XAFS) experiments. DS provides information about thermal, chemical and displacive low-dimensional disorders. XAFS investigation of ferroelectrics reveals local B-cation off-centering and oxidation state. This technique has the advantage of being element-selective. Representative reports of the mentioned studies are described.

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Section: X-ray Diffraction and Scatteringmentioning

confidence: 99%

Section: X-ray Diffraction and Scatteringmentioning

confidence: 99%

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Ferroelectrics under the Synchrotron Light: A Review

et al. 2015

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“…Here, the material transforms to a tetragonal and rhombohedral mixed phase symmetry, also consistent with the earlier results on similar compositions. [27][28][29] From this point, it is no longer possible to calculate lattice strains as the diffraction peaks have split due to the lower symmetry of the induced phase; however, the intensity ratios were calculated from the symmetry dependent reflections to quantify further non-180 domain wall motion in the transformed phase.…”

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The effect of inter-granular constraints on the response of polycrystalline piezoelectric ceramics at the surface and in the bulk

Hossain

Wang

Khansur

et al. 2016

Applied Physics Letters

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The electro-mechanical coupling mechanisms in polycrystalline ferroelectric materials, including a soft PbZrxTi1−xO3 (PZT) and lead-free 0.9375(Bi1/2Na1/2)TiO3-0.0625BaTiO3 (BNT-6.25BT), have been studied using a surface sensitive low-energy (12.4 keV) and bulk sensitive high-energy (73 keV) synchrotron X-ray diffraction with in situ electric fields. The results show that for tetragonal PZT at a maximum electric field of 2.8 kV/mm, the electric-field-induced lattice strain (ε111) is 20% higher at the surface than in the bulk, and non-180° ferroelectric domain texture (as indicated by the intensity ratio I002/I200) is 16% higher at the surface. In the case of BNT-6.25BT, which is pseudo-cubic up to fields of 2 kV/mm, lattice strains, ε111 and ε200, are 15% and 20% higher at the surface, while in the mixed tetragonal and rhombohedral phases at 5 kV/mm, the domain texture indicated by the intensity ratio, I111/I111¯ and I002/I200, are 12% and 10% higher at the surface than in the bulk, respectively. The observed difference in the strain contributions between the surface and bulk is suggested to result from the fact that surface grains are not constrained in three dimensions, and consequently, domain reorientation and lattice expansion in surface grains are promoted. It is suggested that the magnitude of property difference between the surface and bulk is higher for the PZT than for BNT-6.25BT due to the level of anisotropy in the strain mechanism. The comparison of the results from different methods demonstrates that the intergranular constraints have a significant influence on the electric-field-induced electro-mechanical responses in polycrystalline ferroelectrics. These results have implications for the design of higher performance polycrystalline piezoelectrics.

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“…The lattice distortion is defined as g Rh ¼ ffiffi ffi 2 p c Rh =2 ffiffi ffi 3 p a Rh À 1 and g Tet ¼ c Tet =a Tet À 1. 37 In addition, the strain resulting from the electric-fieldinduced pseudocubic to rhombohedral-tetragonal phase transformation (e V ) can be calculated from the volumetric change between the initial and resultant phases by the equation 47 e V ¼ 1 3…”

mentioning

confidence: 99%

Electric-field-induced strain contributions in morphotropic phase boundary composition of (Bi1/2Na1/2)TiO3-BaTiO3 during poling

Khansur

Hinterstein

Wang

et al. 2015

Applied Physics Letters

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The microscopic contributions to the electric-field-induced macroscopic strain in a morphotropic 0.93(Bi1/2Na1/2TiO3)−0.07(BaTiO3) with a mixed rhombohedral and tetragonal structure have been quantified using full pattern Rietveld refinement of in situ high-energy x-ray diffraction data. The analysis methodology allows a quantification of all strain mechanisms for each phase in a morphotropic composition and is applicable to use in a wide variety of piezoelectric compositions. It is shown that during the poling of this material 24%, 44%, and 32% of the total macroscopic strain is generated from lattice strain, domain switching, and phase transformation strains, respectively. The results also suggest that the tetragonal phase contributes the most to extrinsic domain switching strain, whereas the lattice strain primarily stems from the rhombohedral phase. The analysis also suggests that almost 32% of the total strain is lost or is a one-time effect due to the irreversible nature of the electric-field-induced phase transformation in the current composition. This information is relevant to on-going compositional development strategies to harness the electric-field-induced phase transformation strain of (Bi1/2Na1/2)TiO3-based lead-free piezoelectric materials for actuator applications.

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Cyclic electric field response of morphotropic Bi1/2Na1/2TiO3-BaTiO3 piezoceramics

Abstract: Articles you may be interested inEnhanced piezoelectricity and nature of electric-field induced structural phase transformation in textured leadfree piezoelectric Na0.5Bi0.5TiO3-BaTiO3 ceramics

Cited by 55 publications

References 34 publications

Ferroelectrics under the Synchrotron Light: A Review

Ferroelectrics under the Synchrotron Light: A Review

The effect of inter-granular constraints on the response of polycrystalline piezoelectric ceramics at the surface and in the bulk

Electric-field-induced strain contributions in morphotropic phase boundary composition of (Bi1/2Na1/2)TiO3-BaTiO3 during poling

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