Influence of solvent ratio and thermal treatment on structure and dielectric properties of BNT thin films

Abstract The influence of different processing parameters on the structure and dielectric behavior of the bismuth sodium titanate (BNT) multilayered thin films was investigated. Six‐layered BNT thin films with a thickness of ∼300 nm were prepared using sol–gel method and deposited by spin coating. The selection of solvent ratios (acetic acid‐to‐water) in precursor sol preparation had a strong influence on the physical quality of layers and on the formation of a pure perovskite BNT phase. In addition, the influence of thermal treatment of both individual layers and multilayers on the structure and dielectric properties was also studied.