Modeling and Characterization of Piezoelectric Fibers with Metal Core
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概要
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A simple physical model of the first vibration mode of piezoelectric fibers with a metal core is developed for predicting their properties from the parameters of constituents. It is shown that the metal core diameter influences the piezoelectric properties of the fiber only to a lesser extent for diameter ratios lower than 0.3. The good accuracy of the model is confirmed by finite element modeling (FEM). A characterization procedure for actual fibers is then proposed. The properties of the piezoceramic constituent can be deduced from the fiber behavior, which is a precious tool for checking fiber quality. This procedure is applied to experimental Pb(Nb,Ni)O<SUB>3</SUB>–Pb(Zr,Ti)O<SUB>3</SUB> fibers with a platinum core. The actual <I>d</I><SUB>31</SUB> is −112 pC/N for the ceramic phase of the fiber instead of −246 pC/N for the bulk material. It is believed that the poling process (constraints due to the metal core) and the density optimization are the two key factors for improving these performances.
- 公益社団法人 応用物理学会の論文
公益社団法人 応用物理学会 | 論文
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