Preparation and enhanced electrical properties of grain-oriented (Bi1/2Na1/2)TiO3-based lead-free incipient piezoceramics

Zhang, Haibo; Xu, Pingwei; Patterson, Eric A.; Zang, Jiadong; Jiang, Shenling; Rödel, Jürgen

doi:10.1016/j.jeurceramsoc.2015.03.012

Cited by 218 publications

(72 citation statements)

References 59 publications

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“…Interestingly, despite the results showing the electric-field-induced evolution of mixed phase compositions between BNT-5BT and BNT-11BT, optimal properties were still observed at around BNT-7BT as was reported by Takenaka et al 6 In addition, Ma et al 15 have reported electric-field-induced creation/modification of MPB in this material system by in situ TEM. The unusual phase transformation behaviour of BNT-100xBT compositions is of interest as it's been shown to provide a mechanism to so-called "giant" strain property or incipient piezoelectricity [16][17][18][19] in related BNTbased compositions.…”

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confidence: 99%

Electric-field-induced strain contributions in morphotropic phase boundary composition of (Bi1/2Na1/2)TiO3-BaTiO3 during poling

Khansur

Hinterstein

Wang

et al. 2015

Applied Physics Letters

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The microscopic contributions to the electric-field-induced macroscopic strain in a morphotropic 0.93(Bi1/2Na1/2TiO3)−0.07(BaTiO3) with a mixed rhombohedral and tetragonal structure have been quantified using full pattern Rietveld refinement of in situ high-energy x-ray diffraction data. The analysis methodology allows a quantification of all strain mechanisms for each phase in a morphotropic composition and is applicable to use in a wide variety of piezoelectric compositions. It is shown that during the poling of this material 24%, 44%, and 32% of the total macroscopic strain is generated from lattice strain, domain switching, and phase transformation strains, respectively. The results also suggest that the tetragonal phase contributes the most to extrinsic domain switching strain, whereas the lattice strain primarily stems from the rhombohedral phase. The analysis also suggests that almost 32% of the total strain is lost or is a one-time effect due to the irreversible nature of the electric-field-induced phase transformation in the current composition. This information is relevant to on-going compositional development strategies to harness the electric-field-induced phase transformation strain of (Bi1/2Na1/2)TiO3-based lead-free piezoelectric materials for actuator applications.

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confidence: 99%

Electric-field-induced strain contributions in morphotropic phase boundary composition of (Bi1/2Na1/2)TiO3-BaTiO3 during poling

Khansur

Hinterstein

Wang

et al. 2015

Applied Physics Letters

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“…[45]. In piezoelectric applications (for example, in transducers or actuators), the large signal piezoelectric coefficient, d * 33 is one of critical parameters and can be calculated by the following formula [46]:…”

Section: Electromechanical Propertiesmentioning

confidence: 99%

Electrophysical properties of the multicomponent PBZT-type ceramics doped by Sn4+

et al. 2018

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In the work, the multicomponent Pb 0.75 Ba 0.25 (Zr 0.65 Ti 0.35 ) 1-a Sn a O 3 (PBZT/Sn) ceramics were obtained with various tin amounts (a from the range of 0.0 to 0.1). The densification of the PBZT/Sn ceramic samples was performed using pressureless sintering method. The effect of SnO 2 content on the crystal structure of PBZT/Sn ceramics, microstructure, DC electrical conductivity and electrophysical properties (including dielectric and ferroelectric testes), were investigated. The PBZT/Sn ceramic samples exhibit high values of dielectric permittivity at the temperature of ferro-paraelectric phase transition and show the relaxor character of phase transition. Excessive SnO 2 contents doping of the PBZT/Sn materials (already for a = 0.1) might lead to lattice stress and structure defects, which successively leads to the deterioration of ferroelectric and dielectric properties of the ceramic samples. The presented research shows that the addition of SnO 2 to the base PBZT compound (in the proper proportion) gives an additional possibility of influencing the parameters essential for practical applications, from the areas of micromechatronics and microelectronics.

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“…It must be noted that the aspect ratio of typical layer-structured template crystals usually decreases significantly during topochemical reactions. [14][15][16] In addition, the degree of texturing is critically dependent on the sintering time, which commonly exceeds tens of hours. The long sintering time hinders the use of volatile elements.…”

Section: Introductionmentioning

confidence: 99%

“…The long sintering time hinders the use of volatile elements. 15,17 Given that the hysteresis in IPS originates from ferroelastic domain reorientation during an electric-field-induced relaxor-to-ferroelectric transition, one possible solution is the optimal utilization of electrostriction while suppressing the relaxor-to-ferroelectric transition. 4,[18][19][20] It is known that (Bi 1/2 Na 1/2 )TiO 3 -based incipient piezoceramics exhibit a comparatively high electrostrictive coefficient.…”

Section: Introductionmentioning

confidence: 99%

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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Preparation and enhanced electrical properties of grain-oriented (Bi1/2Na1/2)TiO3-based lead-free incipient piezoceramics

Cited by 218 publications

References 59 publications

Electric-field-induced strain contributions in morphotropic phase boundary composition of (Bi1/2Na1/2)TiO3-BaTiO3 during poling

Electric-field-induced strain contributions in morphotropic phase boundary composition of (Bi1/2Na1/2)TiO3-BaTiO3 during poling

Electrophysical properties of the multicomponent PBZT-type ceramics doped by Sn4+

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

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