Article ID Journal Published Year Pages File Type
1532063 Materials Science and Engineering: B 2006 6 Pages PDF
Abstract

The PZT/polyvinyl chloride (PVC) composites are prepared by hot-pressing technique using a novel nanocrystalline PVC. The d33 value observed in this work for the 0.5PZT/0.5PVC composite is close to the 0.5PZT/0.5PVDF composite reported in the literature, but PVC is much cheaper than PVDF. The three-phase fgC/0.5PZT/(0.5 − fg)PVC composites are obtained by adding a small content of graphite particles to the 0.5PZT/0.5PVC composite. The measured dielectric properties demonstrate that a percolation transition occurs in the three-phase composites as in normal two-phase metal–insulator continuum media. An optimum piezoelectric property is obtained by adding fg = 0.005 before the percolation threshold in the fgC/0.5PZT/(0.5 − fg)PVC composites, which is 50% higher than that of the 0.5PZT/0.5PVC composite. X-ray powder diffraction (XRD) patterns show domain rotation is easy in this three-phase composite, and P–E hysteresis loops conform that a small amount of graphite particles adding in the composite break the polymer seclusion, and considerably decrease coercive field of the composite.

Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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