Structure and phase transitions in 0.5(Ba0.7Ca0.3TiO3)-0.5(BaZr0.2Ti0.8O3) from −100 °C to 150 °C

Haugen, Astri Bjørnetun; Forrester, Jennifer S.; Damjanović, Dragan; Li, Binzhi; Bowman, Keith J.; Jones, Jacob L.

doi:10.1063/1.4772741

Cited by 113 publications

(25 citation statements)

References 20 publications

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“…The triple point was called a tricritical point, although no proof on the critically was reported. 194 Recent reports indicate unambiguously the presence of two PPBs on the system 318,322,325,331,333,341 , similarly as found in other BT-based materials. 196,342 Despite the agreement of an interleaving region between R and T phases, further clearance is still required especially in the convergence region (yellow blurred shaded area), as well as the interleaving region between R and T phases.…”

Section: Atomic Structurementioning

confidence: 56%

“…Some authors reported an O phase with 2 symmetry 322,333,343 , while others indicated that the interleaving region is a phase mixture between R and T phases with 3 and 4 symmetries, respectively. 325,331,344 A gradual symmetry change with increasing temperature was confirmed by micro-Raman studies. 345 An electric field induced phase transformation from T and R phases to an O phase has also been speculated in the literature 321 , although was not proven yet.…”

Section: Atomic Structurementioning

confidence: 69%

“…338,339 Nevertheless, detailed XRD experiments were able to reveal the average atomic structure of the system. 331,333 It must be pointed out, however, that the short-range structure of the BZT-BCT differs from its long-range order similarly as in relaxor materials. 340 Figure 3.4 introduces the pseudo-binary phase diagram composed of digitalized data from several literature reports.…”

Section: Atomic Structurementioning

confidence: 99%

“…Moreover, highly asymmetric loops were reported after prolonged and/or high temperature poling treatments. 324,328 The orthorhombic phase: Even with the consideration of the currently disputed symmetry of the interleaving region between R and T phases 318,322,325,331,333,341 , it can be stated that it consists of a phase/s with the lowest average symmetry in all the pseudo-binary phase diagram of BZT-BCT. The role of low symmetry phases such as O or M has been pointed out in several works as a fundamental aspect to realize a high electromechanical response due to facilitated reorientation of .…”

Section: 2)mentioning

confidence: 99%

“…156 Synchrotron studies determined that the R phase is characterized by a 3 symmetry, while the T phase depicts a 4 symmetry. 331,333 Both symmetries originate from a prototype cubic structure with 3 ̅ symmetry. The atomic structure of the interleaving region, however, still remains under debate.…”

Section: Atomic Structurementioning

confidence: 99%

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Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

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2016

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Section: Atomic Structurementioning

confidence: 56%

Section: Atomic Structurementioning

confidence: 69%

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confidence: 99%

Section: 2)mentioning

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Acosta

2016

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Evolution from Lead‐Based to Lead‐Free Piezoelectrics: Engineering of Lattices, Domains, Boundaries, and Defects Leading to Giant Response

Waqar

Chen

et al. 2021

Advanced Materials

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for piezoelectric devices was estimated to be worth $25.1 billion with a projected compounded annual growth rate (CAGR) of 6.2%. [6] However, the development of piezoelectrics took more than a century to evolve from quartz, which is among the first known piezoelectric materials, [7,8] to their current forms in the modern era. The evolution of piezoelectrics is, hence, rich with the exciting discoveries in fundamental physics, paving the way to the development of applications that changed the course of history. One such example is the invention of sonar by Paul Langevin and team in 1917 [9] which is still essentially implemented today for underwater acoustics and navigation. Later, the discovery of ferroelectricity in BaTiO 3 polycrystal in 1946 [10,11] and phase transition (now referred to as a morphotropic phase boundary (MPB)) in PbZrO 3 -PbTiO 3 solid solution in 1954 [12] stimulated a worldwide interest in gaining fundamental understanding of electromechanical coupling in ferroelectric materials to develop better and more reliable piezoelectric devices. [13][14][15] By contrast, the research on piezoelectrics in the past two decades has been driven mainly by the environmental and health concerns related to the toxicity of lead, which is a primary constituent of the widely used lead-based piezoelectric ceramics, [16,17] where the best known example is lead zirconium titanates (PZT). Consequently, the stringent regulations all over the world to restrict the use of lead [18] have resulted in the rise of "lead-free" ceramics which further gained popularity after Saito et al.'s discovery of large piezoelectric response in a lead-free piezoceramic. [19] These eco-friendly materials represent now although a relatively small part of the current piezoelectrics market, with a total estimate of around $172 million, but, their sales are projected to reach $443 million by 2024 with a CAGR of 20.8%. [6] ABO 3 -type perovskite oxide ferroelectrics hold great technical value owing to their large spontaneous polarization, which makes them highly suitable for piezoelectric applications. [1,3,20] In recent years, the research efforts have been primarily focused on developing new strategies to produce high-performance lead-free oxide piezoelectrics with properties at least comparable to or surpassing those of the lead-based counterparts, such as PZT. [20] These strategies have mainly Piezoelectric materials are known to mankind for more than a century, with numerous advancements made in both scientific understandings and practical applications. In the last two decades, in particular, the research on piezoelectrics has largely been driven by the constantly changing technological demand, and the drive toward a sustainable society. Hence, environmental-friendly "lead-free piezoelectrics" have emerged in the anticipation of replacing lead-based counterparts with at least comparable performance. However, there are still obstacles to be overcome for realizing this objective, while the efforts in this direction already seem to culminat...

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Insights into the Early Size Effects of Lead‐Free Piezoelectric Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃

Amorín,

Venet,

García

et al. 2023

Adv Elect Materials

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Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) stands out among lead‐free ferroelectric oxides under consideration to replace state‐of‐the‐art high‐sensitivity piezoelectric Pb(Zr,Ti)O3, for a range of energy conversion ceramic technologies. However, the best performances have been reported for very coarse‐grained materials, and attempts to refine microstructure below 10 µm grain size consistently result in significant property degradation. Here a comprehensive study of the grain size effects on the properties of BCZT across the micron scale is reported, down to the verge of the submicron one. Results show a distinctive early evolution of properties for grain sizes between 1 and 5 µm. For the larger sizes in this range, an opposite effect is found for the piezoelectric charge coefficient and electric field‐induced strain with respect to the very coarse‐grained material, while very good overall performance is maintained. For the lower sizes, relaxor features appear, yet materials can still be poled indicating their ferroelectric nature. This strongly resembles size effects in the Pb(Mg1/3Nb2/3)O3‐PbTiO3 system, driven by the slowing down of the relaxor to ferroelectric transition with size reduction, though kinetics seem to slow down across much larger grain sizes for BCZT. Concomitant changes in the polymorphic phase coexistence are described and discussed by synchrotron X‐ray diffraction.

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Structure and phase transitions in 0.5(Ba0.7Ca0.3TiO3)-0.5(BaZr0.2Ti0.8O3) from −100 °C to 150 °C

Cited by 113 publications

References 20 publications

Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Evolution from Lead‐Based to Lead‐Free Piezoelectrics: Engineering of Lattices, Domains, Boundaries, and Defects Leading to Giant Response

Insights into the Early Size Effects of Lead‐Free Piezoelectric Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃

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Structure and phase transitions in 0.5(Ba0.7Ca0.3TiO3)-0.5(BaZr0.2Ti0.8O3) from −100 °C to 150 °C

Cited by 113 publications

References 20 publications

Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Strain Mechanisms in Lead-Free Ferroelectrics for Actuators

Evolution from Lead‐Based to Lead‐Free Piezoelectrics: Engineering of Lattices, Domains, Boundaries, and Defects Leading to Giant Response

Insights into the Early Size Effects of Lead‐Free Piezoelectric Ba0.85Ca0.15Zr0.1Ti0.9O3

Contact Info

Product

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About

Insights into the Early Size Effects of Lead‐Free Piezoelectric Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃