0–3 piezoelectric composites for large area hydrophones

Garner, Geoffrey; Shorrocks, N. M.; Whatmore, R. W.; Goosey, Martin; Seth, Prem Prakash; Ainger, F. W.

doi:10.1080/00150198908017341

Cited by 32 publications

(6 citation statements)

References 6 publications

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“…Another reason for the increase in the remnant polarization in composite may be that the higher dielectric constant of the polymer matrix can provide larger retention of the polarization of the ceramic particles . The increase in conductivities of polymer can enhance the polarization of ceramics in composite when the conductivity of polymer is less than that of PZT .…”

Section: Reviewmentioning

confidence: 99%

Dielectric and piezoelectric properties of PVDF/PZT composites: A review

Jain

Prashanth

Sharma

et al. 2015

Polymer Engineering & Sci

308

164

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Smart materials, which exhibit piezoelectricity, find an eclectic range of applications in the industry. The direct piezoelectric effect has been widely used in sensor design, and the inverse piezoelectric effect has been applied in actuator design. Ever since 1954, PZT and BaTiO 3 were widely used for sensor and actuator applications despite their toxicity, brittleness, inflexibility, etc. With the discovery of PVDF in 1969, followed by development of copolymers, a flexible, easy to process, nontoxic, high density alternate with high piezoelectric voltage coefficient was available. In the past 20 years, heterostructural materials like polymer ceramic composites, have received lot of attention, since these materials combine the excellent pyroelectric and piezoelectric properties of ceramics with the flexibility, processing facility, and strength of the polymers resulting in relatively high dielectric permittivity and breakdown strength, which are not attainable in a single phase piezoelectric material. The current review article is an attempt to provide a compendium of all the work carried out with reference to PVDF-PZT composites. The review article evaluates the effect of grain size, content and other factors under the purview of dielectric and piezoelectric properties while evaluating the sensitivity of the material for sensor application. POLYM. ENG. SCI., 55:1589-1616, 2015

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Section: Reviewmentioning

confidence: 99%

Dielectric and piezoelectric properties of PVDF/PZT composites: A review

Jain

Prashanth

Sharma

et al. 2015

Polymer Engineering & Sci

308

164

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“…In this study, two types of piezocomposites were developed. 0-3 piezocomposites were fabricated several years ago 2,3 by mixing PZT or PMN-PT polycrystalline powder and polymer. In this study, PSC PMN-PT cubic templates were used as the piezoelectric phase.…”

Section: Introductionmentioning

confidence: 99%

0-3 and 1-3 piezocomposites based on single crystal PMN-PT for transducer applications

Levassort¹,

Hladky‐Hennion²,

Khanh³

et al. 2010

Advances in Applied Ceramics

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0-3 and 1-3 composites were fabricated using piezoelectric single crystals (PSCs). These two connectivities were specifically chosen for large area fabrication. In particular, a lamination technique was used for 1-3 piezocomposites instead of the standard 'dice and fill' method. For 0-3 connectivity, the thickness coupling factor of the fabricated materials using PSC phase was twice that obtained using standard PZT powder for the same volume fraction (60%). However, the efficiency of the poling remained low. For the 1-3 piezocomposites, the properties (such as the thickness coupling factor which reached 74%) of the samples fabricated by the lamination technique were comparable to those obtained with standard methods. Finally, three ultrasonic transducers with centre frequencies between 600 and 850 kHz were fabricated to evaluate the performance of these new piezoelectric composites.

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“…Figure 5(b) exhibits a more exhaustive comparison between the predictions of the second-order virial expansion and a set of six experimental data. 34,[38][39][40][41][42] The data are all measured at frequencies between 1 and 10 kHz. The values of r range between 6.7 and 5933, approaching effectively the limit of conducting inclusion.…”

Section: Numerical Calculationmentioning

confidence: 99%

“…Comparisons between experimental effective medium dielectric permittivities34,[38][39][40][41][42] and predictions of the M-G mixing rule (red dashed), the Bruggeman rule (blue dotted), and the second-order virial expansion (black solid), for composites with neutral spherical inclusions. (a) Comparison with a random composite having relative permittivity r = 15.6.…”

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confidence: 99%

Dielectric virial expansion of polarizable dipolar spheres

Lian

Qin

Freed

2018

The Journal of Chemical Physics

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The dielectric virial expansion is developed for composite systems with embedded interacting dielectric dipolar spheres. Introducing a multiple-scattering expansion for the polarization energy in the presence of an external field enables the derivation of a virial expansion for the polarizability. Substituting the polarizability into the Clausius-Mossotti relation yields the virial series for the effective medium permittivity. When the dipole moment of the particles or inclusions vanishes, the leadingorder term in the series reduces to the Maxwell-Garnett mixing rule, whereas the higher-order terms provide corrections that become important at higher densities. The dielectric virial coefficients are readily evaluated by replacing the surface charge contributions with image lines. Numerical data are presented for the second virial coefficients to illustrate the effects of polarization.

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0–3 piezoelectric composites for large area hydrophones

Cited by 32 publications

References 6 publications

Dielectric and piezoelectric properties of PVDF/PZT composites: A review

Dielectric and piezoelectric properties of PVDF/PZT composites: A review

0-3 and 1-3 piezocomposites based on single crystal PMN-PT for transducer applications

Dielectric virial expansion of polarizable dipolar spheres

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