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- W1983323784 abstract "A new method is presented for evaluating the performance of 1–3 polymer/piezoelectric ceramic composites for hydrophone applications. The Poisson’s ratio effect, i.e., the enhancement of the hydrostatic performance which can be achieved by mixing piezoelectric ceramics with polymers, is studied in detail. Using an “effective medium” approach, algebraic expressions are derived for the composite hydrostatic charge coefficient dh, the hydrostatic figure of merit dhgh, and the hydrostatic electromechanical coupling coefficient kh in terms of the properties of the constituent materials, the ceramic volume fraction, and a microstructural parameter p. The high contrast in stiffness and dielectric constants existing between the two phases can be exploited to derive simple, geometry-independent approximations which explain quantitatively the Poisson’s ratio effect. It is demonstrated that the stiffness and the Poisson’s ratio of the polymer matrix play a crucial role in enhancing hydrophone performance. Using a differential scheme to model the parameter p, we evaluate dh, dhgh, and kh for polymer/piezoelectric ceramic systems at varying compositions. Several examples involving Pb (Zr, Ti)O3 and (Pb,Ca)TiO3 piezoelectric ceramics are given to illustrate the theory." @default.
- W1983323784 created "2016-06-24" @default.
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- W1983323784 date "1998-03-01" @default.
- W1983323784 modified "2023-09-30" @default.
- W1983323784 title "Calculating the performance of 1–3 piezoelectric composites for hydrophone applications: An effective medium approach" @default.
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- W1983323784 doi "https://doi.org/10.1121/1.421306" @default.
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