Optical Properties of Polystyrene (PS) / Ferroelectric Barium Stannate Titanate Ba (Ti_(0.9)Sn_(0.1)) O_3 Ceramic (BST) Composite

摘要

A composite of polystyrene PS/Ferroelectric Barium Stannate Titanate BST with different BST concentration was prepared. Structural measurements (XRD, TGA) showed that they form a good composite for all samples except at BST concentration 10%; this was explained by a non additive law and critical mass of BST. The dielectric properties were measured using HP low impedance frequency analyzer where the samples behaved as RC networks. They become more capacitive than resistive with frequency increments, and the bulk resistance decreased with increasing BST ceramic concentration. Measurement of the optical band gap in the UV-Vis light range show that it is increased with increasing BST concentration which indicate that samples formed a good composite.