A lead-free flexible polymer/ceramic based nanocomposites thin film for electronic application

The polymer composite Bismuth Titanate based lead-free binary system Nylon-11/0.75Bi0.5Na0.5TiO3-0.25SrTiO3 (N11/BNTST) has been developed using the solution casting method in different ratio for advanced energy system. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) were used to confirm the structure. XRD pattern of all samples shows the N11 and rhombohedral phase of BNT-ST with the presence of both phases for the composite. The surface microstructure of a nanocomposites film with a 70:30 N11:BNT-ST composition reveals homogenous BNT-ST nanoparticle dispersion in Nylon-11 matrix with negligible holes. However, compositions with a larger percentage of BNT-ST show agglomeration with a large number of pores, which lowers the dielectric constant and increases dielectric loss. At room temperature, the electrical characteristics of the produced N11/BNT-ST composite are examined periodically. The dielectric behavior of the materials exhibit a decrease in dielectric constant as well as loss with increasing frequency. The experimental data of the N11/BNTST, comparing the pure N11 polymer film to composite, the dielectric characteristics have significantly improved. The maximum dielectric response has been observed for 70N11-30BNTST composition. So, N11/BNTST composite has been shown to be a viable option for applications requiring electronic capacitive energy storage.