Antiferroelectric Shape Memory Ceramics

Uchino, Kenji

doi:10.3390/act5020011

Cited by 32 publications

(15 citation statements)

References 19 publications

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“…The series of phase transition and domain reorientation steps accounts for both the decoupling of the strain and polarization in the longitudinal case, and the coupling in the transverse case. 7,[266][267][268] As stated in the previous section, the E field endows texturing of the AFE domains. 48 Lu et al provided further insights into these processes with a detailed in situ neutron diffraction study.…”

Section: Afe Actuator Applicationsmentioning

confidence: 91%

Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

et al. 2021

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Antiferroelectric (AFE) materials are of great interest owing to their scientific richness and their utility in high-energy density capacitors. Here, the history of AFEs is reviewed, and the characteristics of antiferroelectricity and the phase transition of an AFE material are described. AFEs are energetically close to ferroelectric (FE) phases, and thus both the electric field strength and applied stress (pressure) influence the nature of the transition. With the comparable energetics between the AFE and FE phases, there can be a competition and frustration of these phases, and either incommensurate and/or a glassy (relaxor) structures may be observed. The phase transition in AFEs can also be influenced by the crystal/grain size, particularly at nanometric dimensions, and may be tuned through the formation of solid solutions. There have been extensive studies on the perovskite family of AFE materials, but many other crystal structures host AFE behavior, such as CuBiP 2 Se 6 . AFE applications include DC-link capacitors for power electronics, defibrillator capacitors, pulse power devices, and electromechanical actuators. The paper concludes with a perspective on the future needs and opportunities with respect to discovery, science, and applications of AFE. K E Y W O R D S applications, dielectric materials/properties, ferroelectricity/ferroelectric materials, phase transition F I G U R E 3 Antiferroelectric double hysteresis loops in (A) Pb(Lu 0.5 Nb 0.5 )O 3 and (B) the temperature-dependent critical field in it (replotted from Ref. [30]). (C) shows the phase diagram of PbZrO 3 as a function of temperature and electrical field (replotted from Ref.

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Section: Afe Actuator Applicationsmentioning

confidence: 91%

Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

et al. 2021

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“…Numerous investigations have been carried out [16,[47][48][49][50][51][52][53][54][55][56][57][58][59][60]. For example, in the system Pb 0.99 Nb 0.02 [(Zr 0.6 Sn 0.4 ) 1-y Ti y ] 0.98 O 3 (PNZST), the SME is observed through the transformation between high-temperature AFE and low-temperature FE [16]. (Pb,La)(Zr,Sn,Ti)O 3 (PLZST) tetragonal antiferroelectric single crystals show a large electric field-induced strain up to 0.76% at 110°C [55].…”

Section: Sme In Ferroelectricsmentioning

confidence: 99%

“…Compared to SMAs, SMOs have high strength, high-temperature operation and chemical resistance, which could fulfill some application needs that SMAs can't [1,14,15]. Details on the fundamental mechanism of different types of SMOs can be found in review articles [2,14,16], which therefore will not be focused in this review. The drawbacks of SMOs are that the magnitude of recoverable strain is relatively low and micro-cracking can appear during transformation cycling.…”

Section: Introductionmentioning

confidence: 99%

Recent Developments in Small-Scale Shape Memory Oxides

Wang

Ludwig

2020

Shap. Mem. Superelasticity

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This review presents an overview of the developments in small-scale shape memory materials: from alloys to oxides and ceramics. Shape memory oxides such as zirconia, different ferroelectric perovskites and VO2-based materials have favorable characteristics of high strength, high operating temperature and chemical resistance, which make this class of shape memory materials interesting for special applications, e.g., in harsh environments or at the nanoscale. Because of the constraint and mismatch stress from neighboring grains in polycrystalline/bulk oxides, the transformation strain of shape memory oxides is relatively small, and micro-cracks can appear after some cycles. However, recent progress in shape memory oxide research related to small-scale approaches such as decreasing the amounts of grain boundaries, strain-engineering, and application in the form of nanoscale thin films shows that some oxides are capable to exhibit excellent shape memory effects and superelasticity at nano/micro-scales. The materials systems ZrO2, BiFO3, and VO2 are discussed with respect to their shape memory performance in bulk and small-scale.

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“…Phase transitions between paraelectric, ferroelectric, and antiferroelectric phases are often accompanied by a large change in spontaneous polarization, dielectric permittivity, crystalline structure (lattice strain), and entropy. Because of these intriguing characteristics, they have attracted considerable attention from condensed matter physics (7-10), chemistry (6,11,12), and technological applications including nonvolatile memories, electro-mechanical actuators, and electro-caloric refrigerators (13)(14)(15)(16)(17)(18)(19)(20)(21)(22).Typical examples of ferroelectric-antiferroelectric phase transitions in inorganic substances are Pb(Zr,Ti)O3 (1) and (Bi,RE)FeO3 (14, 23), where RE stands for a rare earth metal atom. In these substances, the ionic radius ratio (or the Goldschmidt tolerance factor) is a key factor controlling the phase behavior (23).…”

mentioning

confidence: 99%

Self-organization into ferroelectric and antiferroelectric crystals via the interplay between particle shape and dipolar interaction

Takae

Tanaka

2018

Proc. Natl. Acad. Sci. U.S.A.

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Ferroelectricity and antiferroelectricity are widely seen in various types of condensed matter and are of technological significance not only due to their electrical switchability but also due to intriguing cross-coupling effects such as electro-mechanical and electro-caloric effects. The control of the two types of dipolar order has practically been made by changing the ionic radius of a constituent atom or externally applying strain for inorganic crystals and by changing the shape of a molecule for organic crystals. However, the basic physical principle behind such controllability involving crystal-lattice organization is still unknown. On the basis of a physical picture that a competition of dipolar order with another type of order is essential to understand this phenomenon, here we develop a simple model system composed of spheroid-like particles with a permanent dipole, which may capture an essence of this important structural transition in organic systems. In this model, we reveal that energetic frustration between the two types of anisotropic interactions, dipolar and steric interactions, is a key to control not only the phase transition but also the coupling between polarization and strain. Our finding provides a fundamental physical principle for self-organization to a crystal with desired dipolar order and realization of large electro-mechanical effects.

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Antiferroelectric Shape Memory Ceramics

Cited by 32 publications

References 19 publications

Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

Recent Developments in Small-Scale Shape Memory Oxides

Self-organization into ferroelectric and antiferroelectric crystals via the interplay between particle shape and dipolar interaction

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