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Poly(vinyl alcohol)-potassium sodium niobate-poly(vinylpyrrolidone) composite films (PVA-KNN-PVP) were successfully fabricated via a solvent casting technique. The dependence of the dielectric and electric performances of the resultant PVA-KNN-PVP composites on different weight percentages of PVP and frequency was investigated. The composite surface morphology shows that KNN particles and PVP were uniformly distributed in the PVA matrix. The dielectric constant of the PVA-KNN-PVP composites is enhancing remarkably as 108 and loss value (1.04) about 12 wt% PVP at 10 2  Hz, which is 18 times greater than that of neat PVA. Thus, these PVA-KNN-PVP composites are suitable for high-energy storage applications.

Enhanced dielectric and electrical performance of poly(vinyl alcohol) (PVA)-potassium sodium niobate (KNN)- polyvinylpyrrolidone (PVP) composite films