Electrostrictive Coefficients of Pb(Mg1/3Nb2/3)O3Ceramics

Kuwata, Jun; Uchino, Kenji; Nomura, Shōichiro

doi:10.1143/jjap.19.2099

Cited by 116 publications

(54 citation statements)

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“…The phenomenological electrostrictive coefficient Q 11 is estimated at 0.023 m 4 C À2 , which is no smaller than that of the representative electrostrictive materials in the literature. 36 As commonly expected, 19,37 both the electrostrictive coefficient and the strain are highly stable against temperature change (Fig. 8(b)).…”

Section: Resultssupporting

confidence: 80%

Incipient piezoelectrics and electrostriction behavior in Sn-doped Bi1/2(Na0.82K0.18)1/2TiO3 lead-free ceramics

Han¹,

Jo²,

Kang³

et al. 2013

Journal of Applied Physics

161

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Articles you may be interested inElectric-field-temperature phase diagram of the ferroelectric relaxor system (1−x)Bi1/2Na1/2TiO3−xBaTiO3 doped with manganese J. Appl. Phys. 115, 194104 (2014) Relaxorlike dielectric properties and history-dependent effects in the lead-free K 0.5 Na 0. Dielectric, ferroelectric, piezoelectric, and strain properties of lead-free Sn-doped Bi 1/2 (Na 0.82 K 0.18 ) 1/2 TiO 3 (BNKT) were investigated. A crossover from a nonergodic relaxor to an ergodic relaxor state at room temperature, accompanied by a giant electric-field-induced strain, was observed at 5 at. % Sn doping. Switching dynamics monitored during a bipolar poling cycle manifested that the observed giant strain originates from incipient piezoelectricity. When Sn doping level reached 8 at. %, BNKT exhibited an electrostrictive behavior with a highly temperature-insensitive electrostrictive coefficient of Q 11 ¼ 0.023 m 4 C À2 . V C 2013 AIP Publishing LLC [http://dx;

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Section: Resultssupporting

confidence: 80%

Incipient piezoelectrics and electrostriction behavior in Sn-doped Bi1/2(Na0.82K0.18)1/2TiO3 lead-free ceramics

Han¹,

Jo²,

Kang³

et al. 2013

Journal of Applied Physics

161

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“…This result is further supported by the constricted polarization hysteresis loops (Supplementary Figure S3). 2 Consistent with the common knowledge that the electrostrictive coefficient is temperature insensitive, 24 it is seen that the temperature dependence of the electromechanical strain is far more stable in RTGG than in CSSR (Figure 1c and Supplementary Figure S4).…”

Section: Sample Characterizationsupporting

confidence: 81%

Forced electrostriction by constraining polarization switching enhances the electromechanical strain properties of incipient piezoceramics

et al. 2017

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Recently developed lead-free incipient piezoceramics are promising candidates for off-resonance actuator applications due to their exceptionally large electromechanical strains. Their commercialization currently faces three critical challenges: the high driving electric field required for delivering the potentially large strains; large strain hysteresis, which is inappropriate for precision devices; and relatively high temperature dependencies. We propose that instead of utilizing incipient piezoelectric strains, harnessing the maximum possible electrostriction would provide a highly effective way to resolve all these challenges. This concept was experimentally demonstrated using textured 0.97Bi 1/2 (Na 0.78 K 0.22 ) 1/2 TiO 3 -0.03BiAlO 3 as an exemplary incipient piezoceramic, whereby texturing was achieved using a reactive templated grain-growth technique. The manufactured textured ceramic is characterized by S max /E max of 995 pm V − 1 and an electrostrictive coefficient, Q 33 , of 0.049 m 4 C − 2 . Both these parameters are as large as those of single crystals. The current work presents a significant advancement in the field of lead-free ceramics and can guide future efforts in this direction. In addition, the concept presented here can be easily transferred to other disciplines involving the design of functional properties of various materials. NPG Asia Materials (2017) 9, e346; doi:10.1038/am.2016.210; published online 27 January 2017 INTRODUCTIONSince the first report on incipient piezoelectric strain (IPS) in a (Bi 1/2 Na 1/2 )TiO 3 (BNT)-based lead-free ceramic, 1 there have been numerous attempts to enhance the strain properties of these materials. These studies have concluded that IPS is a common feature of relaxor ferroelectrics as long as their freezing temperature is below room temperature, that is, they are in the ergodic relaxor state, whereas ferroelectric long-range order is only stable under the application of a certain or higher electric field. 2-4 It should be noted that the electric-field-induced strain in a normal ferroelectric material is approximately half the strain inherently available for the given system. This result is due to the presence of the remanent state, which typically occupies~0.1% of the entire phase. 2 Piezoelectric strain commonly refers to the difference between the maximum and remanent strain levels, and it may be greatly enhanced by minimizing the remanent strain, as is the case for IPS.Thus far, most useful IPSs have been found in relaxor ferroelectrics, 3,5 indicating that the inherently large poling field, E pol , (poling field: an electric field required for inducing ferroelectric state out of the existing relaxor state, determined at the inflection point of the electric-field-dependent strain curve as illustrated

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“…The electrostrictive coefficient for PMN was found to have very little temperature dependence in a measurement range between À100 and þ100 8C. [25] However, in relaxor materials polarization and relative permittivity are strong functions of temperature leading to large temperature dependence of the strain (Eq. 3).…”

Section: à2mentioning

confidence: 99%

High‐Strain Lead‐free Antiferroelectric Electrostrictors

Zhang

Kounga²,

et al. 2009

Advanced Materials

388

197

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Electromechanical coupling in actuators provides high strain with high force, e.g. to drive motors, control fuel injection, etc.[1] This strain is provided through either piezoelectricity or electrostriction. Most piezoelectric and electrostrictive devices use lead-based materials (e.g., ferroelectric Pb(Zr,Ti)O 3 (PZT) for piezoelectrics and relaxor Pb(Mg 1/3 Nb 2/3 )O 3 (PMN) for electrostrictors). Environmental legislation in the European Union, [2] in parts of Asia, and the US demands elimination of toxic lead for these materials systems. Recently, this spurred a large effort in the research of lead-free actuator materials, focusing development on piezoelectric lead-free materials, [3][4][5][6] with rare examples on lead-free relaxor ferroelectrics. [7] The new materials still suffer a range of problems, for example the strong temperaturedependence of obtainable strain. [8] In this paper we demonstrate a new concept of using lead-free antiferroelectrics as electrostrictors, providing high strain and minimal losses at room temperature combined with minimal temperature dependence.Piezoelectric strain is possible only in materials with sufficiently low symmetry (most noncentrosymmetric materials) while the electrostrictive effect is present in all materials. [9] In tensor notation the electric-field induced strain, S ij , can be written either as a power series in electric field, E k , or in polarization P k :ði; j; k; lÞ ¼ 1; 2; 3 (1)The first term in either equation represents the contribution of the converse piezoelectric effect, the second term electrostriction. The piezoelectric coefficients d kij and g kij are collected in a third rank tensor, while the electrostriction coefficients M ijkl and Q ijkl constitute a fourth rank tensor. The first equation only holds true for small electric fields, whereas the second equation is more fundamental. [10] In order to make the fourth-rank tensor in Equation 2 more manageable, it is reduced to a second rank 6 Â 6 matrix. [10] If only non-shear strain components are considered the strain contribution by electrostriction is given by: [10]

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Electrostrictive Coefficients of Pb(Mg_1/3Nb_2/3)O₃Ceramics

Cited by 116 publications

References 0 publications

Incipient piezoelectrics and electrostriction behavior in Sn-doped Bi1/2(Na0.82K0.18)1/2TiO3 lead-free ceramics

Incipient piezoelectrics and electrostriction behavior in Sn-doped Bi1/2(Na0.82K0.18)1/2TiO3 lead-free ceramics

Forced electrostriction by constraining polarization switching enhances the electromechanical strain properties of incipient piezoceramics

High‐Strain Lead‐free Antiferroelectric Electrostrictors

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