Effects of the Domain Size on Local d33 in Tetragonal (<scp><scp>Na</scp></scp>0.53<scp><scp>K</scp></scp>0.45<scp><scp>Li</scp></scp>0.02)(<scp><scp>Nb</scp></scp>0.8<scp><scp>Ta</scp></scp>0.2)<scp><scp>O</scp></scp>3 Ceramics

Le, Duc-Thang; Kwon, So-Jung; Yeom, Na-Ri; Lee, Young Jin; Jeong, Young‐Hun; Chun, Myung‐Suk; Nam, Joong-Hee; Paik, Jong Hoo; Kim, Byung-Ik; Cho, Jeong‐Ho

doi:10.1111/j.1551-2916.2012.05445.x

Cited by 23 publications

(12 citation statements)

References 37 publications

(66 reference statements)

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“…The piezoelectric response of fibers depends on the applied voltage and diameter of the fibers. 53 The most important parameters influencing the diameter of the fiber are solution viscosity, temperature, surface tension, and distance between the tip and the collector. 54 Le et al found that the piezoelectric coefficient of piezoelectric materials increases with decrease in the domain size.…”

Section: Resultsmentioning

confidence: 99%

Piezoelectric Response in Electrospun Poly(vinylidene fluoride) Fibers Containing Fluoro-Doped Graphene Derivatives

2018

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Herein, graphene oxide (GO) was suitably functionalized to obtain carboxylated and fluorinated GO (GOCOOH and GOF) derivatives, respectively, via the Hunsdiecker reaction. Electrospun mats of poly(vinylidene fluoride) (PVDF)/GO, PVDF/GOCOOH, and PVDF/GOF fibers were then prepared by electrospinning from well-dispersed GO derivatives. The piezoelectric coefficient ( d 33 ), as measured using piezoelectric force measurement (PFM), enhanced by more than 2 folds with respect to the control PVDF spun mat. The piezoelectric coefficient though enhanced upon the addition of GO and GOCOOH, however, enhanced significantly in the case of GOF. For instance, a drastic increase in piezoelectric response from 30 pm V –1 (electrospun neat PVDF) to 63 pm V –1 (for electrospun PVDF/GOF) was observed as revealed from PFM results. The phase transformation in these fibers was systematically investigated by various techniques such as Fourier transform infrared spectroscopy (FTIR), wide angle X-ray diffraction (XRD), Raman spectroscopy, and PFM. FTIR and XRD results revealed that the electrospun fiber mats showed predominantly β-PVDF. Interestingly, the highest β content was obtained in the presence of GOF. The drastic enhancement in β phase is due to the presence of highly electronegative fluorine. The addition of GOCOOH and GOF in PVDF not only increases the polar β phase but also changes the piezoelectric response significantly. More interestingly, PVDF/GOF films exhibited higher energy density and dielectric permittivity when compared with the control PVDF samples. These findings will help guide the researchers working in this field from both theoretical understanding and practical view point for energy storing device and charge storage electronics.

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Section: Resultsmentioning

confidence: 99%

Piezoelectric Response in Electrospun Poly(vinylidene fluoride) Fibers Containing Fluoro-Doped Graphene Derivatives

2018

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“…38,39 The apparatus PFM facilitates the in situ domain morphology observations at different temperatures by providing evidence of domains orientation. 38,39 The apparatus PFM facilitates the in situ domain morphology observations at different temperatures by providing evidence of domains orientation.…”

Section: Resultsmentioning

confidence: 99%

“…The piezoelectric performance of ferroelectric polycrystals is deemed to be highly correlated with domain morphologies. 38,39 The apparatus PFM facilitates the in situ domain morphology observations at different temperatures by providing evidence of domains orientation. 11,21,40,41 The in situ lateral PFM phase and lateral piezoresponse of the x = 0 and x = 0.5 samples at different temperatures are depicted in Figs.…”

Section: Resultsmentioning

confidence: 99%

Further Enhancing Piezoelectric Properties by Adding MnO₂ in AgSbO₃‐Modified (Li,K,Na)(Nb,Ta)O₃ Lead‐Free Piezoceramics

et al. 2016

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This work investigated the effect of MnO2 addition on the phase structure, microstructure, and electrical properties of AgSbO3‐modified (Li,K,Na)(Nb,Ta)O3 (abbreviated as LKNNT‐AS) lead‐free piezoelectric ceramics with an optimized composition endowed with a state of two‐phase coexistence. A small amount (0.1 wt%) of MnO2 can significantly further enhance the piezoelectric property of LKNNT‐AS ceramics, whose piezoelectric constant d33 and converse piezoelectric coefficient d33* as well as planar electromechanical coupling factor kp reach 363 pC/N, 543 pm/V, and 0.49, respectively. The temperature stability of piezoelectricity in MnO2‐modified LKNNT‐AS samples also improved, which is associated with the more uniform and better thermally stable ferroelectric domains that were revealed by piezoresponse force microscopy.

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“…Recently, Cho et al . found that local d 33 * increased from 18 to 38 pm/V with decrease in domain size from 1000 to 300 nm in (Na 0.53 K 0.45 Li 0.02 )(Nb 0.8 Ta 0.2 )O 3 . Therefore, it is reasonable to hypothesize, that ultrahigh strain could be obtained with the miniaturization of the domain structure down to the nanometer scale (nanodomain) in KNN‐based piezoceramics.…”

Section: Introductionmentioning

confidence: 97%

Nanodomains in KNN‐Based Lead‐Free Piezoelectric ceramics: Origin of Strong Piezoelectric Properties

et al. 2014

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Excellent piezoelectric properties of d 33 * = 768 pm/V and strain = 0.07% at 1 kV/mm, were obtained by lead-free in (Na 0.52 K 0.4425 Li 0.0375 )(Nb 0.86 Ta 0.06 Sb 0.08 )O 3 ceramics. They displayed good temperature stability up to 200°C. Significantly enhanced piezoelectricity originated from nanodomains of width 20-30 nm, and the result was confirmed by transmission electron microscopy. The above-mentioned nanodomains emerged because of low domain wall energy near polymorphic phase transition regions and insignificant differences in cell parameters between orthorhombic and tetragonal phases. The nanodomain configuration easily responded to an external electric field, leading to high electric field-induced strain.

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Effects of the Domain Size on Local d₃₃ in Tetragonal (Na_0.53K_0.45Li_0.02)(Nb_0.8Ta_0.2)O₃ Ceramics

Cited by 23 publications

References 37 publications

Piezoelectric Response in Electrospun Poly(vinylidene fluoride) Fibers Containing Fluoro-Doped Graphene Derivatives

Piezoelectric Response in Electrospun Poly(vinylidene fluoride) Fibers Containing Fluoro-Doped Graphene Derivatives

Further Enhancing Piezoelectric Properties by Adding MnO₂ in AgSbO₃‐Modified (Li,K,Na)(Nb,Ta)O₃ Lead‐Free Piezoceramics

Nanodomains in KNN‐Based Lead‐Free Piezoelectric ceramics: Origin of Strong Piezoelectric Properties

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Effects of the Domain Size on Local d33 in Tetragonal (Na0.53K0.45Li0.02)(Nb0.8Ta0.2)O3 Ceramics

Cited by 23 publications

References 37 publications

Piezoelectric Response in Electrospun Poly(vinylidene fluoride) Fibers Containing Fluoro-Doped Graphene Derivatives

Piezoelectric Response in Electrospun Poly(vinylidene fluoride) Fibers Containing Fluoro-Doped Graphene Derivatives

Further Enhancing Piezoelectric Properties by Adding MnO2 in AgSbO3‐Modified (Li,K,Na)(Nb,Ta)O3 Lead‐Free Piezoceramics

Nanodomains in KNN‐Based Lead‐Free Piezoelectric ceramics: Origin of Strong Piezoelectric Properties

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Effects of the Domain Size on Local d₃₃ in Tetragonal (Na_0.53K_0.45Li_0.02)(Nb_0.8Ta_0.2)O₃ Ceramics

Further Enhancing Piezoelectric Properties by Adding MnO₂ in AgSbO₃‐Modified (Li,K,Na)(Nb,Ta)O₃ Lead‐Free Piezoceramics