Strong Piezoelectricity in (1 – x)(K0.4Na0.6)(Nb0.96Sb0.04)O3-xBi0.5K0.5Zr1–ySnyO3 Lead-Free Binary System: Identification and Role of Multiphase Coexistence

Zheng, Ting; Wu, Jiagang; Xiao, Dingquan; Zhu, Jianguo; Wang, Xiangjian; Xin, Lipeng; Lou, Xiaojie

doi:10.1021/acsami.5b00151

Cited by 66 publications

(27 citation statements)

References 43 publications

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“…Meanwhile, the d 33 was found to remain such high level of 670 pC N −1 , with decreasing crystal thickness down to 40 μm. This excellent piezoelectric property is superior to other KNN-based materials reported in the literatures, including non-textured ceramics, textured ceramics and single crystals1720212223 and even better than PZT4 ceramics17. The temperature dependence of the dielectric properties of KNN-based lead free single crystals, of different thicknesses and measured at 1 kHz, are given in Fig.…”

Section: Resultsmentioning

confidence: 77%

New Potassium Sodium Niobate Single Crystal with Thickness-independent High-performance for Photoacoustic Angiography of Atherosclerotic Lesion

Zhu

Yang

et al. 2016

Sci Rep

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The synthesis of (K0.45Na0.55)0.96Li0.04NbO3 (KNLN) single crystals with a <100>-orientation, using a seed-free solid state crystal growth method, is described here. With the thickness of the crystals decreasing down to the order of tens of micrometers, this new lead-free single crystal exhibits thickness-independent electrical behavior, and maintains superior piezoelectric constant (d33 = 670 pC N−1) and electromechanical coupling factor (kt = 0.55). The successful fabrication of a tiny intravascular photoacoustic probe, with a 1 mm outside diameter, is achieved using a single crystal with a thickness of around 60 μm, in combination with a 200 μm core multimode fiber. Wire phantom photoacoustic images show that the axial resolution and lateral resolution of the single crystal based probe are 60 and 220 μm, respectively. In addition, intravascular photoacoustic imaging of the atherosclerotic lesion of a human artery is presented. In the time-domain and frequency-domain images, calcified regions are clearly distinguishable from surrounding tissue. These interesting results demonstrate that KNN-based lead-free piezoelectric single crystals are a promising candidate to substitute for lead-based piezoelectric materials for photoacoustic imaging in the future.

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Section: Resultsmentioning

confidence: 77%

New Potassium Sodium Niobate Single Crystal with Thickness-independent High-performance for Photoacoustic Angiography of Atherosclerotic Lesion

Zhu

Yang

et al. 2016

Sci Rep

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“…3. It can be seen that there are three vibrational modes for BO 6 (i.e., u1, u2, and u5) [6]. The peak around 600 cm À1 is u1, which is stronger than the left one.…”

Section: Resultsmentioning

confidence: 93%

Modification of strain and piezoelectricity in (K,Na)NbO3–(Bi,Na)HfO3 lead-free ceramics with high Curie temperature

Wang

2016

Journal of Alloys and Compounds

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a b s t r a c tIn this work, the (1-x)K 0.45 Na 0.55 NbO 3 -xBi 0.5 Na 0.5 HfO 3 lead-free ceramics with a high Curie temperature were prepared by the normal sintering, and the enhancement in strain and piezoelectricity can be attained by tailoring the corresponding compositions. The orthorhombic-tetragonal (OeT) phase coexistence was observed in the ceramics with 0.03 < x < 0.055, and then such a phase boundary was reasonably identified by X-ray diffraction patterns as well as temperature -dependent Raman spectra and dielectric constant. A large piezoelectric constant (d 33 ) of~385 pC/N and a high Curie temperature (T C ) of 315 C can be simultaneously induced in the ceramics with x ¼ 0.05. More interestingly, a high unipolar strain of~0.187% was shown in the ceramics with x ¼ 0.04. It was found that the enhanced piezoelectric properties should be attributed to the two phase coexistence as well as enhanced dielectric and ferroelectric properties. We believe that this material is one of the most promising candidates in the field of high-temperature piezoelectrics.

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“…While the highest d 33 coefficients reach values no higher than 40 pC/N (even in textured ceramics), other families of compositions reach very much higher values [90]. Thus, within the solid solution [92].…”

Section: Perspectives Of Aurivillius Materials As Lead Free Piezoelecmentioning

confidence: 93%

Review and Perspectives of Aurivillius Structures as a Lead-Free Piezoelectric System

Moure

2018

Applied Sciences

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According to the EU-Directives 2002/95/EC, 2002/96/EC, lead-based piezoceramics must be substituted in the future with more environmentally friendly alternatives, only when a reliable alternative is found. This is why an increasing interest has grown in the research community to find lead free piezoelectric materials that fulfil the requirements for this substitution. Different families of compounds have been shown to be possible candidates for this use, such as bismuth and niobates based perovskites, pyrochlores, etc. However, a material with piezoelectric coefficients similar to those of PZT (lead zirconate titanate, Pb[Zr x Ti 1-x ]O 3 ) has not been yet found. Besides, each of these families has its specific characteristics in terms of remnant polarization, coercive field or application temperature. Thus, the choice of each material should be made according to the specific needs of the application. In this sense, Aurivillius-type structure materials (also known as Bismuth Layered Structure Ferroelectrics, BLSF) can take advantage of their specific properties for uses as Lead Free Piezoelectric systems. Some of them have a high Curie temperature, which make them good candidates to be used as high temperature piezoelectrics; high coercive fields, which facilitates their use as actuators; or a high switching fatigue resistance, which can be useful for future applications as Ferroelectric Random Access Memories (FERAM).Keywords: bismuth layered ferroelectric structures; aurivillius; piezoelectric; multiferroic OverviewMany of the peculiar characteristic properties of Aurivillius materials are determined by their crystalline structure. Figure 1 shows the prototype of the Aurivillius structure as a function of the number of pseudo-perovskite layers [2]. The "n" values can range from 1 to ∞. In this case (n = ∞), the repeated cell is the pure perovskite. The number of perovskites can be odd, even or a mixture. Examples of each case are Bi 2 WO 6 (n = 1) and Bi 4 Ti 3 O 12 (n = 3); Bi 3 TiNbO 9 , SrBi 2 Nb 2 O 9 (n = 2) and CaBi 4 Ti 4 O 12 (n = 4); an example for a mixture Aurivillius is Bi 7 Ti 4 NbO 21 . In this case, layers with 2 or 3 pseudo-perovskites are alternated with the [Bi 2 O 2 ] 2+ layers.At difference of the ferroelectrics with perovskite structure, the polarization is not produced by the displacement of the B cation within the oxygen octahedral but by relative shifts of the oxygen octahedral through the a-axis with respect to the [001] bismuth chain. They can be divided in 3 main movements, as illustrated in references [3-5]:Oxygen octahedral in the a-axis. -Relative displacements in the opposite direction to B cations of the perovskite with respect to the octahedral. -Displacement through the a-axis of the oxygen ions of the Bi-O layer.

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Strong Piezoelectricity in (1 – x)(K_0.4Na_0.6)(Nb_0.96Sb_0.04)O₃-xBi_0.5K_0.5Zr_1–ySn_yO₃ Lead-Free Binary System: Identification and Role of Multiphase Coexistence

Cited by 66 publications

References 43 publications

New Potassium Sodium Niobate Single Crystal with Thickness-independent High-performance for Photoacoustic Angiography of Atherosclerotic Lesion

New Potassium Sodium Niobate Single Crystal with Thickness-independent High-performance for Photoacoustic Angiography of Atherosclerotic Lesion

Modification of strain and piezoelectricity in (K,Na)NbO3–(Bi,Na)HfO3 lead-free ceramics with high Curie temperature

Review and Perspectives of Aurivillius Structures as a Lead-Free Piezoelectric System

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