Effects of Oxide Additives to (Ba,Sr)TiO3 Ceramics Fired under Reduced Atmosphere

Abstract

Ba0.6Sr0.4TiO3 doped with MgO, CaO, SrO, or BaO thick films with Ni electrodes were prepared by screen printing. The prepared thick films showed a perovskite single phase. TC was changed corresponding to the kinds of doping oxides. The tunability and tanδ value of thick films doping with 2 mol% of BaO or CaO at an electric field of 10 V/μm were approximately 85% and 0.3%, respectively. The leakage current of Ba0.6Sr0.4TiO3 thick films doped with 2 mol% of BaO thick films at 10 V/μm was less than 10−6 A/cm2 and the value was less than that of thick films doped with 2 mol% of CaO.