Experimental and theoretical dielectric studies of PVDF/PZT nanocomposite thin films

Zak, A. Khorsand; Gan, Wee Chen; Majid, W.H. Abd.; Darroudi, Majid; Velayutham, Thamil Selvi

doi:10.1016/j.ceramint.2011.01.037

Cited by 137 publications

(65 citation statements)

References 22 publications

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“…It was observed that the dielectric loss decreased as the frequency increased-the same trend is documented in the literature, e.g., from 100 Hz to 15 MHz [17]. Moreover, the decrease is pronounced in the low frequency range below 1 kHz, being in accordance with [18].…”

Section: Discussionsupporting

confidence: 74%

Microstructure and Properties of Plasma Sprayed Lead Zirconate Titanate (PZT) Ceramics

et al. 2012

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Lead zirconate titanate (PZT) was plasma sprayed onto various substrates of different character. Additionally, a free-standing body made by plasma spraying was investigated. X-ray diffraction analyses of a decomposition of the as-sprayed coating products detected components of the PT-PZ system as well as binary oxides-PbO and ZrO 2 . Due to the comparatively complex phase character, the Curie temperature monitored by DTA, had a smeared appearance without pronounced maxima. The corresponding electrical properties are comparable with those typically observed for CaTiO 3 , but are worse than the normal values of bulk PZT due to defective stoichiometry.

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Section: Discussionsupporting

confidence: 74%

Microstructure and Properties of Plasma Sprayed Lead Zirconate Titanate (PZT) Ceramics

et al. 2012

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“…The absorbencies at 614 cm −1 , 760 cm −1 , 795 cm −1 , 853 cm −1 , 974 cm −1 , 1071 cm −1 , and 1172 cm −1 correspond to α-PVDF and the absorbencies at 879 cm −1 and 838 cm −1 correspond to β-PVDF. [19][20][21] The relative amount of β-phase obtained from the formula F(β) = A β /(1.26A α + A β ) are 0.388 and 0.462 in pure PVDF and composite, respectively. A β is the absorbance at 838 cm −1 and A β is the absorbance at 760 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Magnetic, dielectric and magnetodielectric properties of PVDF-La0.7Sr0.3MnO3 polymer nanocomposite film

Thirmal¹,

Nayek²,

Murugavel³

et al. 2013

AIP Advances

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We have investigated the structure, magnetic and dielectric properties of PVDFLa 0.7 Sr 0.3 MnO 3 polymer nanocomposite thick film fabricated by dip coating technique along with the magnetodielectric effect. The structure and dielectric properties show the enhanced β phase in the composite compared to the PVDF film. The coupling between the ferroelectric and magnetic phases in the composite is revealed in the form of dielectric anomaly at the ferromagnetic Curie temperature. We observed 1.9% magnetodielectric effect at 300 K with the possibility of enhanced effect near the transition temperature. In addition, the analysis of the electric modulus indicates that the composite exhibits interfacial related relaxation and it follows Arrhenius Law. Our study suggests that the ac conductivity of the PVDF-La 0.

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“…(4) PZT/polymer composites have both the piezoelectric and dielectric properties of PZT and the mechanical properties of polymers. (6,7) In recent years, studies on PZT/polymer composites have drawn increasing attention. Polyvinylidene fluoride (PVDF) is chosen as a polymer matrix owing to its good flexibility and piezoelectric properties as well as low stiffness and mechanical impedance.…”

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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Experimental and theoretical dielectric studies of PVDF/PZT nanocomposite thin films

Cited by 137 publications

References 22 publications

Microstructure and Properties of Plasma Sprayed Lead Zirconate Titanate (PZT) Ceramics

Microstructure and Properties of Plasma Sprayed Lead Zirconate Titanate (PZT) Ceramics

Magnetic, dielectric and magnetodielectric properties of PVDF-La0.7Sr0.3MnO3 polymer nanocomposite film

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

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