Dielectric properties of PZT–epoxy composite thick films

Pascariu, V.; Padurariu, Leontin; Avadanei, O. G.; Mitoşeriu, Liliana

doi:10.1016/j.jallcom.2013.05.136

Cited by 20 publications

(11 citation statements)

References 35 publications

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“…Besides extreme efforts to improve the performance of electronic devices that are way to obtain composite thick films with different filler contents is a gravitational casting method. Pascariu et al [10] employed this method in order to obtain flat composites with compositional gradient along the thickness direction and in-plane homogeneous composition. They found that compositional gradients can be controlled to some extent by changing the filler properties, the matrix density, and the casting parameters.…”

Section: Introductionmentioning

confidence: 99%

PZT–NZF/CF ferrite flexible thick films: Structural, dielectric, ferroelectric, and magnetic characterization

et al. 2019

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The preparation and properties of thick flexible three-phase composite films based on lead zirconium titanate (PZT) and various ferrites (nickel zinc ferrite (NZF) and cobalt ferrite (CF)) were reported in this study. Properties of three-phase composite films were compared with pure polyvinylidene fluoride (PVDF) and PZT-PVDF films. X-ray diffraction data indicated the formation of well crystallized structure of PZT and NZF/CF phases, without the presence of undesirable phases. Scanning electron micrographs showed that the ceramic particles were dispersed homogeneously in the PVDF matrix and atomic force microscopy confirmed that the size of the particles is around 30 nm. Non-saturated hysteresis loops were evident in all samples due to the presence of highly conductive ferrite phases. Under magnetic field of 10 kOe, composite films exhibited a typical ferromagnetic response. Dielectric properties were investigated in the temperature range from-128 to 250 ℃ and frequency range of 400 Hz-1 MHz. The results showed that the value of dielectric constant of the PVDF/PZT/ferrite composites increased about 25% above the one obtained for pure PVDF.

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Section: Introductionmentioning

confidence: 99%

PZT–NZF/CF ferrite flexible thick films: Structural, dielectric, ferroelectric, and magnetic characterization

et al. 2019

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“…Several dielectric composites have been proposed by using BaTiO 3 particles as filler and a thermoplastic [5][6][7][8][9][10][11] or thermosetting [12,18] polymer as matrix. Composites can be prepared in many different ways, leading to a large variety of morphologies, which strongly influence the macroscopic behavior [19].…”

Section: Introductionmentioning

confidence: 99%

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Reboredo

Parra

Castro

2015

Mater. Res. Express

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On the basis of theoretical predictions and experimental results, an empirical method using upper bound equation of the rule of mixtures (ROM) is reported to predict the dielectric permittivity of barium titanate nanofibers. In addition, composites with low volume fraction of BaTiO 3 fiber layers embedded in epoxy resin were prepared and characterized. The relative permittivities of composites with perpendicular and parallel configurations, with respect to the electrodes, were calculated by means of the ROM model. The predicted permittivities matched precisely the obtained experimental values.

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“…An overview of the thick film fabrication process is provided in Figure 1. It is well known that the distribution of dielectric fillers and conductive fillers within an insulative matrix influences the macroscopic dielectric and piezoelectric characteristics of the thick composite films [32,35,37,31]. Hence, the PZT and MWNT fillers were preprocessed.…”

Section: Composite Filmmentioning

confidence: 99%

“…Composites comprised of piezoelectric ceramic fillers embedded within a matrix material have been proposed for many applications such as hybrid energy systems [24,25], battery separator materials [26], energy harvesting, energy conversion storage [6,24,25,27], and capacitors [35,36]. Two-phase polymer matrix-based composites such as PZT-epoxy [37], comprised of piezoelectric particles embedded within a continuous polymer matrix, have attracted much attention due to their flexibility, ease of processing, and use in embedded passive devices. Integration of embedded passive components into printed circuit boards generally results in enhanced electrical performance of the device, improved reliability, reduction of device size, faster switching speed, and lower production costs [28].…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric and Dielectric Characterization of MWCNT-Based Nanocomposite Flexible Films

Banerjee

Sundar

et al. 2018

Journal of Nanomaterials

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PZT-epoxy-multiwalled carbon nanotube (MWCNT) flexible thick film actuators were fabricated using a sol-gel and spin coat and deposition process. Films were characterized in terms of their piezoelectric and dielectric properties as a function of MWCNT volume fraction and polarization process. Correlations between surface treatment of the MWCNTs and composite performance were made. The surface morphology and filler distribution were observed with the aid of SEM and TEM images. The volume fraction of PZT was held constant at 30%, and the volume fraction of MWCNTs varied from 1% to 10%. Two forms of dielectric polarization were compared. Corona discharge polarization induced enhanced piezoelectric and dielectric properties by a factor of 10 in comparison to the parallel-plate contact method (piezoelectric strain coefficient and dielectric constant were 0.59 pC/N and 61.81, respectively, for the parallel-plate contact method and 9.22 pC/N and 103.59 for the corona polarization method, respectively). The percolation threshold range was observed to occur at a MWCNT volume fraction range between 5% and 6%.

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Dielectric properties of PZT–epoxy composite thick films

Cited by 20 publications

References 35 publications

PZT–NZF/CF ferrite flexible thick films: Structural, dielectric, ferroelectric, and magnetic characterization

PZT–NZF/CF ferrite flexible thick films: Structural, dielectric, ferroelectric, and magnetic characterization

Dielectric permittivity calculation of composites based on electrospun barium titanate fibers

Piezoelectric and Dielectric Characterization of MWCNT-Based Nanocomposite Flexible Films

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