Different piezoelectric grain size effects in BaTiO3 ceramics

Wang, J.C.; Zheng, Peng; Yin, R.Q.; Zheng, Limei; Du, Juan; Liang, Zheng; Deng, Jiang; Song, Kexing; Qin, Hui

doi:10.1016/j.ceramint.2015.07.039

Cited by 38 publications

(21 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, different testing approaches can lead to separate observations, too. For instance, measurements performed on poled ceramics under high-strength field (above the coercive field) and on unpoled ceramics under small-signal perturbation (far lower than the coercive) can both be found in the literature [8,11,21,22]. For the investigation on poled ceramics, however, reports regarding moderate-to-high-frequency properties are seldom seen.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic versus extrinsic effects of the grain boundary on the properties of ferroelectric nanoceramics

Kang

Wang

et al. 2017

Phys. Rev. B

View full text Add to dashboard Cite

As the grain size decreases to the nanometer range, the characteristics of the ferroelectric nanoceramic can be ultimately determined by the competition between two effects: the intrinsic effect that is associated with the local properties of the grain boundary and the extrinsic effect that arises from the dynamics of domain structure which is highly influenced by the depolarization field caused by the grain boundary. In this work we investigate such a competition with a phase-field simulation based on the time-dependent Ginzburg-Landau (TDGL) kinetic equation.The study is performed on poled/unpoled nanoceramics under high-and low-amplitude bipolar alternating electric field with selected grain size and loading frequency. Our calculations for poled BaTiO 3 at 100 Hz show that, for the grain size from 170 to 50 nm, its properties are dominated by the extrinsic effect, and from 50 to 10 nm, they are dominated by the intrinsic one. As the grain size decreases, the dielectric and piezoelectric constants at the remnant state continuously rise in the extrinsic-dominated region and then drop sharply in the intrinsic-dominated region. Our frequency calculations from 10 to 2,500 Hz at the grain size of 100 nm indicate that the high-frequency behavior is very similar to that of the small grain-size, intrinsic-dominated one, whereas the low-frequency behavior is closely related to that of the large grain-size, extrinsic-dominated part, with the demarcation line occurring around 400 Hz. For the un-poled ceramics under small signal loading, the intrinsic effect is dominant over the entire range of grain size and frequency.

show abstract

Section: Introductionmentioning

confidence: 99%

Intrinsic versus extrinsic effects of the grain boundary on the properties of ferroelectric nanoceramics

Kang

Wang

et al. 2017

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…The low T c (120°C) and relatively low d of BT confines its piezoelectric application, so BT is generally researched in the combination with other high T c ceramics. Besides that, Wang et al [32] reported that by controlling the grain size of BT, d 33 can be improved from the traditional 191 pC/N up to over 400 pC/N; Kimura et al [33] doped BT with a small amount of Li which showed a high d 33 to 260 pC/N and T c to 130°C. FOM of BT is usually no more than 5 (10 12 Pa 1 ).…”

Section: Materials Selection For Pehmentioning

confidence: 97%

Ferroelectric materials for vibrational energy harvesting

Song

Wang

2016

Sci. China Technol. Sci.

View full text Add to dashboard Cite

Energy harvesting is an appealing technology that makes use of the ambient energy which is otherwise wasted. Piezoelectric materials directly convert the elastic energy to the electric energy, and thus have a great advantage in scavenging vibrational energy for simplicity in device structure with relatively high power density. This paper provides an overview on the research of piezoelectric materials in energy harvesting in recent decades, from basics of piezoelectricity and working principle of energy harvesting with piezoelectric materials, to the progress of development of high-performance piezoelectrics including ceramics, single crystals and polymers, then to experimental attempts on the device fabrication and optimization, finally to perspective applications of piezoelectric energy harvesting (PEH). The criteria for selection of materials for PEH applications are introduced. Not only the figure of merit but also maximum allowable stress of materials are taken into account in the evaluation of their potential in achieving high energy density and output power density. The influence of the device configuration on the performance is also acknowledged and discussed. The magnitude and distribution of induced stress in the piezoelectric unit upon excitation by the vibration source play an important role in determining the output power density and can be tuned via proper design of device configuration without changing its resonant frequency. Approaches to address the issue of frequency match accompanying with the resonant mode are illustrated with literature examples. Usage of PEH devices can be extended to a variety of vibration sources in everyday life as well as in nature. Some appealing applications of PEH, such as in implantable and wearable devices, are reviewed. energy harvesting, ferroelectric materials, piezoelectricity, figure of merit, applications Citation:Song J D, Wang J. Ferroelectric materials for vibrational energy harvesting.

show abstract

“…9),12), 14) Despite the smaller grain size of the WA-TSS-BT01 and WA-CS-BT03, the properties were lower than those of the annealed ceramics. Thus, the variations of d 33 , k 33 , and s 33 E , observed in this study could not be explained solely in terms of varying grain size.…”

Section: )13)mentioning

confidence: 99%

“…12) However, a change in the d 33 values from 419 to 185 pC/N by increasing grain size from 7 to 19¯m despite the almost maintained domain width of 480 nm was reported, 13) which suggested another mechanism involved. J. C. Wang 14) suggested that the grain-size effect in BT ceramics was not absolute and there was a trend different from the traditional one. Moreover, the electrical properties could be affected by the nature of raw materials, their stoichiometry, and processing techniques used.…”

Section: Introductionmentioning

confidence: 99%

Grain-size dependence of piezoelectric properties in thermally annealed BaTiO<sub>3</sub> ceramics

Khanal

Kim

et al. 2018

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

BaTiO 3 ceramics with grain sizes of 4.726.1¯m were fabricated using 100 and 300 nm BaTiO 3 powders by employing a two-step sintering (TSS) or conventional one-step sintering (CS) method. Polished and cut BaTiO 3 samples were annealed for the recovery and relaxation of mechanical-processing-induced surface damage and lattice strain, and the piezoelectric properties were investigated. TSS-BaTiO 3 ceramics annealed at 1000°C for 1 h with a grain size of 4.9¯m exhibited an excellent piezoelectric property of d 33 = 529 pC/N, while the d 33 value of CS-BaTiO 3 ceramics annealed at 1200°C for 8 h with a grain size of 26.1¯m was 272 pC/N. Besides the excellent piezoelectric properties of the fine-grained BaTiO 3 ceramics, the performance of the coarse-grained ceramics was higher than previously reported. The observed superior piezoelectric and electromechanical properties in annealed samples despite the increase in grain size suggested that the effect of annealing was more crucial than that of grain size.

show abstract

Different piezoelectric grain size effects in BaTiO3 ceramics

Cited by 38 publications

References 24 publications

Intrinsic versus extrinsic effects of the grain boundary on the properties of ferroelectric nanoceramics

Intrinsic versus extrinsic effects of the grain boundary on the properties of ferroelectric nanoceramics

Ferroelectric materials for vibrational energy harvesting

Grain-size dependence of piezoelectric properties in thermally annealed BaTiO<sub>3</sub> ceramics

Contact Info

Product

Resources

About