Piezoelectric, dielectric, and elastic properties of poly(vinylidene fluoride/trifluoroethylene)

Wang, H.; Zhang, Q. M.; Cross, L. E.; Sykes, Alan O.

doi:10.1063/1.354566

Cited by 110 publications

(44 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Also, we assume that dielectric permittivity of FE matrix is isotropic. This is indeed the case for a number of relaxor FE polymers (for example, P(VDF-TrFE), [65]). Even if FE crystal is anisotropic it is unlikely that such an anisotropy persists in granular materials.…”

Section: Applicability Of Resultsmentioning

confidence: 99%

Competition of magneto-dipole, anisotropy and exchange interactions in composite multiferroics

Belemuk¹,

Udalov²,

Chtchelkatchev³

et al. 2016

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Abstract. We study the competition of magneto-dipole, anisotropy and exchange interactions in composite three dimensional multiferroics.Using Monte Carlo simulations we show that magneto-dipole interaction does not suppress the ferromagnetic state caused by the interaction of the ferroelectric matrix and magnetic subsystem. However, the presence of magneto-dipole interaction influences the orderdisorder transition: depending on the strength of magneto-dipole interaction the transition from the ferromagnetic to the superparamagnetic state is accompanied either by creation of vortices or domains of opposite magnetization. Unusual temperature hysteresis loop occurs in composite multiferroics due to non-monotonic behavior of exchange interaction vs temperature. The origin of this hysteresis is related to the presence of stable magnetic domains which are robust against thermal fluctuations.

show abstract

Section: Applicability Of Resultsmentioning

confidence: 99%

Competition of magneto-dipole, anisotropy and exchange interactions in composite multiferroics

Belemuk¹,

Udalov²,

Chtchelkatchev³

et al. 2016

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…Taking the data of the dielectric constant and elastic modulus, it can be estimated from Equation 5 that a Maxwell-stress-induced strain accounts for ±0.87 % of the thickness strain if a Poisson's ratio of 0.4 is assumed. [19] The two strains combined account for more than 75 % of the total observed strain response for a composite with Figure 6. The strain amplitude S A as a function of the applied-field amplitude E A measured at room temperature for the composites with f = 0.127 (dots) and 0.23(circles) of PANI volume concentration.…”

Section: Full Papermentioning

confidence: 99%

Enhanced Dielectric and Electromechanical Responses in High Dielectric Constant All‐Polymer Percolative Composites

Huang

Zhang²

2004

Adv Funct Materials

278

210

View full text Add to dashboard Cite

A type of all‐polymer percolative composite is introduced which exhibits a very high dielectric constant (> 7000). The experimental results also show that the dielectric behavior of this new class of percolative composites follows the predictions of the percolation theory and the analysis of conductive percolation phenomena. The very high dielectric constant of the all‐polymer composites, which are also very flexible and possesses an elastic modulus close to that of the insulation polymer matrix, makes it possible to induce a high electromechanical response under a very reduced electric field (a strain of 2.65 % with an elastic energy density of 0.18 J cm–3 can be achieved under a field of 16 MV m–1). Data analysis also suggests that within the composites, the non‐uniform local field distribution as well as interface effects can significantly enhance the strain responses. Furthermore, the experimental data as well as the data analysis indicate that conduction loss in the composites will not affect the strain hysteresis.

show abstract

“…The diffraction results suggested that the matrix P(VDF-TrFE) systems have an all-trains (TTTT) conformation [11,12]. Specifically, there were repeated units of a carbon back bone with two hydrogen and two fluorine atoms of the all-trains (TTTT) conformation as β-phase [13]. The all-trains (TTTT) conformation was formed by a net dipole moment pointing from relatively electronegative fluorine to hydrogen [13].…”

Section: Methodsmentioning

confidence: 99%

“…Specifically, there were repeated units of a carbon back bone with two hydrogen and two fluorine atoms of the all-trains (TTTT) conformation as β-phase [13]. The all-trains (TTTT) conformation was formed by a net dipole moment pointing from relatively electronegative fluorine to hydrogen [13]. The ensembles of the alltrains (TTTT) conformation collectively contributed to the piezoelectric property of the bulk P(VDF-TrFE).…”

Section: Methodsmentioning

confidence: 99%

Using in-situ synchrotron x-ray diffraction to investigate phase transformation and lattice relaxation of a three-way piezo-phototronic soft material

Hsu

Weng

et al. 2017

Semicond. Sci. Technol.

View full text Add to dashboard Cite

A poly(vinylidene fluoride-co-trifluoro-ethylene) piezoelectric polymer is blended with nano particles of titanium oxide phthalocyanine to bridge photoconductive and piezoelectric effects. In this study, a system is examined by in situ synchrotron x-ray to test a three-way piezophototronic soft-material design. The sample is heated for in situ phase transformation characterization. The semi-crystalline poly (vinylidene fluoride-co-trifluoro-ethylene) polymer gradually transforms to an amorphous structure. A complementary piezoelectric experiment before and after the heating experiment shows that the piezoelectric performance is proportional to the phase ratio. Secondly, the system is examined to test its phototronic effect. Piezoelectric responses are measured by controlling the light illumination. The positive and negative controls of light illumination which validate this newly-designed system can be modulated by a three-way piezo-phototronic effect. In-situ synchrotron x-ray diffraction experiments are employed to measure the microstructure evolution as a function of applied voltage up to 800 V. We then Semiconductor Science and Technology

show abstract

Piezoelectric, dielectric, and elastic properties of poly(vinylidene fluoride/trifluoroethylene)

Cited by 110 publications

References 8 publications

Competition of magneto-dipole, anisotropy and exchange interactions in composite multiferroics

Competition of magneto-dipole, anisotropy and exchange interactions in composite multiferroics

Enhanced Dielectric and Electromechanical Responses in High Dielectric Constant All‐Polymer Percolative Composites

Using in-situ synchrotron x-ray diffraction to investigate phase transformation and lattice relaxation of a three-way piezo-phototronic soft material

Contact Info

Product

Resources

About