Piezoelectric and dielectric properties of PZT/PVC and graphite doped with PZT/PVC composites

Liu, Xiaofang; Xiong, Chuanxi; Sun, Huajun; Dong, Lijie; li, Ri; Liu, Yang

doi:10.1016/j.mseb.2005.10.022

Cited by 70 publications

(42 citation statements)

References 17 publications

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“…Thus, it is a key issue to enhance dielectric permittivity of polymers while retaining other excellent performances. One versatile route is to disperse a high dielectric constant ceramic powder [5,6] into the polymer matrix [7][8][9], which can combine excellent dielectric behavior of fillers with superior processing property and chemical stability from the polymers. However, the excellent dielectric properties of such composites need high particle concentration (over 60 vol%), which can lead to the degradation of mechanical properties and processability of the polymers.…”

mentioning

confidence: 99%

Polyvinylidene fluoride/vanadium pentoxide composites with high dielectric constant and low dielectric loss

Quan

Chen

Xie

et al. 2013

Phys. Status Solidi A

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Novel polymer-based composites with high dielectric constant and low dielectric loss were prepared by simply mixing polyvinylidene fluoride (PVDF) with semiconductor vanadium pentoxide (V 2 O 5 ) filler. V 2 O 5 nanobelts with diameter around 50 nm and length up to micrometer scale were uniformly distributed in PVDF matrix without serious aggregation. The PVDF/V 2 O 5 composites show excellent dielectric properties. When the volume fraction of V 2 O 5 is 0.15 and the frequency is 100 Hz, the dielectric constant of the composites can reach as high as 140 and the dielectric loss is 0.7. Both dielectric constant and dielectric loss of the composites show but sharp increase when the volume fraction of V 2 O 5 is above 0.15. Furthermore, the dependences of the dielectric constant and dielectric loss on frequency were also studied. With the increase of frequency from 10 2 to 10 7 Hz, dielectric constant of the PVDF/V 2 O 5 composites decreases, while the dielectric loss increases slightly. The results indicate that the PVDF/V 2 O 5 composites are promising materials for capacitors.

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mentioning

confidence: 99%

Polyvinylidene fluoride/vanadium pentoxide composites with high dielectric constant and low dielectric loss

Quan

Chen

Xie

et al. 2013

Phys. Status Solidi A

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“…(8)(9)(10)(11)(12)(13) Ideally, a larger volume fraction of PZT corresponds to improved piezoelectric and dielectric properties; however, when the volume fraction of PZT is larger than 70%, the flexibility and strength of the composites can be greatly reduced. (14,15) Furthermore, the PZT particles may aggregate and be deposited in large numbers at a high volume fraction of PZT, decreasing the piezoelectric and dielectric performance of the composites. (16) Therefore, simultaneously improving the flexibility and the piezoelectric and dielectric properties of PZT/polymer composites remains a major challenge for realizing their applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Large-Area and Flexible Lead Zirconate Titanate/Polyvinyl-Butyral/Additives Composite Films for Piezoelectric Sensor Application

2016

Sensors and Materials

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To satisfy the requirement of structural health monitoring (SHM) using light sensors with high sensitivity, novel large-area and flexible lead zirconate titanate (PZT)/polyvinyl-butyral (PVB)/ additives composite films were fabricated by the tape casting method. The microstructure and the piezoelectric and dielectric properties of the PZT/PVB/additives composite films were investigated systematically. Owing to the additives (dibutyl phthalate + castor oil), the flexibility and uniformity of the PZT/PVB composite films were improved significantly compared with conventional PZT/ PVB composite films. Moreover, the surfaces of the PZT/PVB/additives composite films are smooth and highly resistant to cracking. Scanning electron microscopy (SEM) was adopted to analyze the microstructure of the films. The microstructure analysis shows that microholes exist in the PZT/PVB composite films and an agglomeration phenomenon is noticeable. In contrast, PZT particles are well dispersed in the PVB matrix and there are few obvious microholes in the PZT/PVB/additives composite films. Furthermore, from energy-dispersive spectroscopy (EDS) results, it can be concluded that PZT particles were deposited at the bottom surface of the PZT/ PVB composite films. However, uniform deposition of PZT particles is achieved in the PZT/PVB/ additives composite films. In addition, owing to the additives, the improvement of the piezoelectric and dielectric properties of PZT/PVB/additives composite films is observed at a high volume fraction of PZT [φ (PZT) > 60%]. At φ (PZT) = 85%, the largest piezoelectric constant (d 33 ) reaches 44 pC/N, which is much higher than that of the reported PZT/PVDF films and PZT/PVB films. Moreover, the dielectric constant (ε r ) of the PZT/PVB/additives composite films (at room temperature and a frequency of 1 kHz) is higher than that of the PZT/PVB composite films with the same φ (PZT), and the dielectric loss (tanδ) is lower. Both the improved piezoelectric and dielectric properties are desirable for new piezoelectric sensor applications.

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“…The findings published in the literature indicate that ceramic/polymer composites have potential technological applications in several areas because they can be obtained as flexible film. However, despite the advantages of composite materials, their poling still poses difficulties [1,7] because the effective electric field to polarize ferroelectric ceramic particles is much lower than the applied electric field.…”

Section: Introductionmentioning

confidence: 99%

“…Several DA VID PUBLISHING D studies have shown that the inclusion of a semiconductor phase favors the poling process [6][7][8][9][10][11][12]. However, the effect of a semiconductor phase on the polarization state and ferroelectric property of the composite is still not well-known and requires more in-depth studies.…”

Section: Introductionmentioning

confidence: 99%

Poled Polyaniline Coated Piezo Composite Using Low Electric Field and Reduced Poling Time: A Functional Material

FuzariJr¹,

Arlindo²,

Zaghete³

et al. 2014

JMSE-B

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Composite films were prepared by two different routes: lead zirconate titanate (PZT) particles coated with polyaniline (PAni) dispersed in a polymeric matrix of polyvinylidene fluoride (PVDF); and PZT particles and PAni powder dispersed separately in the polymer matrix. The electrical conductivity of the particles was controlled by the protonation and de-protonation of PAni in solution with controlled pH. The results indicate that the percolation threshold of the composite made of PZT coated with a conductive layer (PZT-PAni) is in the range of 20 vol.% to 30 vol.% of PZT-PAni. The PZT-PAni/PVDF composite redoped in solution with pH 3.7 showed the best results in terms of longitudinal piezoelectric coefficient (d 33 ) in samples containing 30 vol.% of ceramic particles due to the equilibrium between conduction and poling effects on the composite. The poling process of the composite sample required just 5 MV/m electric field applied during 15 min. Furthermore, the composite was used as sensor in structural health monitoring (SHM), showing the possibility to propose it as a functional material.

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Piezoelectric and dielectric properties of PZT/PVC and graphite doped with PZT/PVC composites

Cited by 70 publications

References 17 publications

Polyvinylidene fluoride/vanadium pentoxide composites with high dielectric constant and low dielectric loss

Polyvinylidene fluoride/vanadium pentoxide composites with high dielectric constant and low dielectric loss

Preparation and Characterization of Large-Area and Flexible Lead Zirconate Titanate/Polyvinyl-Butyral/Additives Composite Films for Piezoelectric Sensor Application

Poled Polyaniline Coated Piezo Composite Using Low Electric Field and Reduced Poling Time: A Functional Material

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