Extensive domain wall contribution to strain in a (K,Na)NbO3-based lead-free piezoceramics quantified from high energy X-ray diffraction

Ochoa, Diego A.; Esteves, Giovanni; Iamsasri, Thanakorn; Rubio-Marcos, Fernando; Fernández, J.F.; García, José E.; Jones, Jacob L.

doi:10.1016/j.jeurceramsoc.2016.03.022

Cited by 40 publications

(27 citation statements)

References 20 publications

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“…The XRD data processing enables the quantification of the lattice strain and the extrinsic strain exerted by the sample, and provides insight into the correlation between the microstructure and the macroscopic strain. 3 Following the procedure performed by Ochoa et al 3 the 002 and 200 degenerate reflections were fitted using line profile analysis. Assuming that the asymmetric nature of the peaks cannot be adequately fitted by using symmetric profile shape functions, only the symmetrical portion of the asymmetric peaks are fitted.…”

Section: B Domain Switching and Electric-field-induced Lattice Strainmentioning

confidence: 99%

“…Lead titanate-zirconate (PZT) ceramics are the most widely used piezoelectric materials. However, legal restrictions on the use of lead in electrical and electronic devices have led to greater efforts being made to develop lead-free alternatives to PZT-based materials [1][2][3][4][5][6]. Hence, many researchers have attempted to present materials capable of replacing lead-based ceramics .…”

Section: Introductionmentioning

confidence: 99%

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Understanding the piezoelectric properties in potassium-sodium niobate-based lead-free piezoceramics: Interrelationship between intrinsic and extrinsic factors

Rubio-Marcos

Fernández

Ochoa

et al. 2017

Journal of the European Ceramic Society

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Lead zirconate titanate (PZT) based ceramics are currently enjoying a wide use in piezoelectric devices despite lead toxicity. Due to growing environmental concerns, the attention on piezoelectric ceramics has been moving to lead-free materials, in particular to (K,Na)NbO 3-based ceramics. Here we report a systematic evaluation of the effects of the compositional modifications on [(K0.44Na0.52Li0.04)[(Nb0.86Ta0.10Sb0.04)1-xZr5x/4]O3 lead-free piezoceramics. We show that an interrelationship between the intrinsic and extrinsic factors is the linchpin for the development of good piezoelectric properties. Hence, the stabilization of the tetragonal symmetry on the orthorhombic-tetragonal polymorphic phase boundary facilities the poling process of the system, thereby enhancing the piezoelectric response. Additionally, the microstructure appears to be related to the piezoelectric properties; i.e., the improved piezoelectric properties correlate to the increase in grain size. The results of this work could help to understand the origin of piezoelectricity in potassium-sodium niobate-based ceramics.

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Section: B Domain Switching and Electric-field-induced Lattice Strainmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Understanding the piezoelectric properties in potassium-sodium niobate-based lead-free piezoceramics: Interrelationship between intrinsic and extrinsic factors

Rubio-Marcos

Fernández

Ochoa

et al. 2017

Journal of the European Ceramic Society

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“…grain size, domain wall dynamics, etc.) contributors [53,54]. This implies that a significant decrease in grain size has the potential to produce a notable modification of nonlinear response in piezoceramics.…”

Section: Sps Of Nanostructured Piezoceramicsmentioning

confidence: 99%

Fabrication of Fine-Grained Functional Ceramics by Two-Step Sintering or Spark Plasma Sintering (SPS)

Matizamhuka¹

2020

Design and Manufacturing

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The majority of functional materials today are based on ceramic materials which find use in a wide range of applications that include magnetic, electronic, optical, thermoelectric (TE) and piezoelectric energy. The properties and reliability of functional ceramic materials are highly depended on the density, grain size and existence of heterogeneities in the microstructure. It is a well-known fact that there is property enhancement at finer grain sizes for most functional materials through a multitude of mechanisms depending on the application. However, what remains a challenge is the success in maintaining fine-grained microstructures using conventional sintering methods. The use of such methods results in uncontrollable grain growth and coarse microstructures which negate the benefits of fine-grained related properties. The use of spark plasma sintering (SPS) technique offers an opportunity to produce fine-grained microstructures with minimum grain growth. However, grain refinement is not always guaranteed during SPS sintering especially under high-temperature sintering conditions. Therefore, sintering conditions that allow densification with minimal grain growth are well suited for microstructural refinement. A modified two-step sintering (TSS) methodology in SPS has proven to yield promising results and has potential use in the production of functional ceramic materials with controlled microstructures.

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“…The volume of the material affected by domain wall strains, which is related to domain wall density, is then estimated from the diffuse intensities between the 002 and 200 diffraction peaks [20,21]. Figure 3 shows the percentage of the diffuse scattering (volume fraction of the material) due to domain walls for PNZT and PFZT.…”

Section: This Is the Post-print (Ie Final Draft Post-refereeing) Ofmentioning

confidence: 99%

Low temperature dielectric relaxation in ordinary perovskite ferroelectrics: enlightenment from high-energy x-ray diffraction

Ochoa¹,

Levit²,

Fancher³

et al. 2017

J. Phys. D: Appl. Phys.

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Ordinary ferroelectrics exhibit a second order phase transition that is characterized by a sharp peak in the dielectric permittivity at a frequency-independent temperature. Furthermore, these materials show a low temperature dielectric relaxation that appears to be a common behavior of perovskite systems. Tetragonal lead zirconate titanate is used here as a model system in order to explore the origin of such an anomaly, since there is no consensus about the physical phenomenon involved in it. Crystallographic and domain structure studies are performed from temperature dependent synchrotron X-ray diffraction measurement. Results indicate that the dielectric relaxation cannot be associated with crystallographic or domain configuration changes. The relaxation process is then parameterized by using the Vogel-Fulcher-Tammann phenomenological equation. Results allows us to hypothesize that the observed phenomenon is due to changes in the dynamic behavior of the ferroelectric domains related to the fluctuation of the local polarization.Keywords: ferroelectrics, piezoelectric materials, dielectric response, dielectric relaxation This is the post-print (i.e. final draft post-refereeing) of the publication. The final publication is available at IOPSience via http://dx.doi.org/10.1088IOPSience via http://dx.doi.org/10. /1361 2 The macroscopic dielectric response of ferroelectric materials is closely linked to the crystallographic structure, to the ferroelectric/ferroelastic domain structure and to the dynamic behaviors of that domain structure [1]. One of the most attractive aspects of dielectric studies is that the temperature-dependent dielectric response is also sensitive to changes in the crystal structure as well as in the domain structure and/or their dynamic behavior [2]. For instance, phase transitions appear as a maximum in the real and/or imaginary permittivity versus temperature curve. In particular, the paraelectric to ferroelectric phase transition manifests as a sharp peak at a frequency-independent temperature in ordinary ferroelectrics while a wide peak at a temperature that is frequency-dependent is observed in the so-called relaxor ferroelectrics [3].A widely studied dielectric anomaly appears at low temperatures in ordinary perovskite ferroelectrics [4][5][6][7][8][9][10][11][12][13][14][15][16]. In the PbZr1-xTixO3 (PZT) system, for instance, it appears independently of the crystallographic phase as a flat region in the real part of the permittivity (ε'), and as a dispersion of the maximum in the imaginary part of the permittivity (ε'') [5]. When the PZT system is acceptor doped, the frequency-dependent maximum of ε'' becomes more visible [5]. However, the anomalous behavior of the permittivity seem to vanish when the material is donor doped [4][5][6]. A similar anomalous temperature-dependent permittivity has been reported in NaNbO3 piezoresponse force microscopy studies showed no phase contrast. Algueró el at. [16] This is the post-print (i.e. final draft post-refereeing) of the publication. ...

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Extensive domain wall contribution to strain in a (K,Na)NbO3-based lead-free piezoceramics quantified from high energy X-ray diffraction

Cited by 40 publications

References 20 publications

Understanding the piezoelectric properties in potassium-sodium niobate-based lead-free piezoceramics: Interrelationship between intrinsic and extrinsic factors

Understanding the piezoelectric properties in potassium-sodium niobate-based lead-free piezoceramics: Interrelationship between intrinsic and extrinsic factors

Fabrication of Fine-Grained Functional Ceramics by Two-Step Sintering or Spark Plasma Sintering (SPS)

Low temperature dielectric relaxation in ordinary perovskite ferroelectrics: enlightenment from high-energy x-ray diffraction

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