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- W2385311368 abstract "A system for measuring nonlinear dielectric permittivity was set up. The nonlinear dielectric permittivities of thick PT/P[VDF(70)-TrFE(30)] 0|3 ferroelectric composite films have been measured at 1kHz at applied electric field ranging from 1 to 10MV/m.When PT volume fraction is greater thn 0^3,the dielectric permittivity e-1 of composites shows a distinct dependence on electric field.The Maxwell|Garnett equation is suitable for predication of e-1 when is less than 0^1.The Yamada model can be used to best fit the experimental results, while Bruggeman equation can only be used to predict e-1 at low electric field. The absolute value of the second order dielectric permittivity e-2 increases with increasing PT volume fraction.e-2 of the composites with both the ceramic and copolymer phase being poled (B2) is higher than that of composites with only the ceramic phase being poled (B1).The results show that the magnitude and direction of the remnant polarization of composite films can be determined by measuring e-2. In addition,e-2 is independent of electric field.The third order dielectric permittivity e-3 of composites also shows a dependence on electric field. A higher electric field produces a lower e-3.The e-3 value of B1 is always higher than that of B2 for every PT concentration." @default.
- W2385311368 created "2016-06-24" @default.
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- W2385311368 date "2000-01-01" @default.
- W2385311368 modified "2023-09-27" @default.
- W2385311368 title "NONLINEAR DIELECTRIC PROPERTIES OF PT/P[VDF(70)-TrFE(30)]0-3 FERROELECTRIC COMPOSITE MATERIALS" @default.
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