In situ poling and imidization of amorphous piezoelectric polyimides
نویسندگان
چکیده
منابع مشابه
In Situ Poling and Imidization of Amorphous Piezoelectric Polyimides
An amorphous piezoelectric polyimide containing polar functional groups has been developed using a combination of experimental and molecular modeling for potential use in high temperature applications. This amorphous polyimide, (β-CN)APB/ODPA, has exhibited good thermal stability and piezoelectric response at temperatures up to 150 ̊C. Density functional calculations predicted that a partially c...
متن کاملPolarization Stability of Amorphous Piezoelectric Polyimides
Amorphous polyimides containing polar functional groups have been synthesized and investigated for potential use as high temperature piezoelectric sensors. The thermal stability of the piezoelectric effect of one polyimide was evaluated as a function of various curing and poling conditions under dynamic and static thermal stimuli. First, the polymer samples were thermally cycled under strain by...
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Composites of lead zirconate titanate particles in an epoxy matrix are prepared in the form of 0-3 and quasi 1-3 with different ceramic volume contents from 10% to 50%. Two different processing routes are tested. Firstly a conventional dielectrophoretic structuring is used to induce a chain-like particle configuration, followed by curing the matrix and poling at a high temperature and under a h...
متن کاملModeling of poling , piezoelectric , and pyroelectric properties of ferroelectric 0 – 3 composites
A model for the piezoelectric and pyroelectric activities of 0–3 composites of ferroelectric particles in a linear matrix has been developed based on the polarization behavior of the inclusions. The model is applied to simulate the piezoelectric activity of a lead zirconate titanate/epoxy system polarized under different fields and the piezoand the pyroelectric properties of lead titanate/ poly...
متن کاملGiant Strain and Induced Ferroelectricity in Amorphous BaTiO3 Films under Poling
We report an effect of giant surface modification of a 5.6 nm thick BaTiO₃ film grown on Si (100) substrate under poling by conductive tip of a scanning probe microscope (SPM). The surface can be locally elevated by about 9 nm under -20 V applied during scanning, resulting in the maximum strain of 160%. The threshold voltage for the surface modification is about 12 V. The modified topography is...
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ژورنال
عنوان ژورنال: Polymer
سال: 2004
ISSN: 0032-3861
DOI: 10.1016/j.polymer.2004.05.057