Low-Temperature Sintering lead-free Barium Titanate-Based X7P Ceramics with Bi_2O_3 Dopant and ZnO-B_2O_3 Flux Agent

摘要

The sintering temperature of BaTiO_3 powder was reduced to 870°C due to the H_3BO_3-ZnO-Bi_2O_3 addition. Excellent densification was achieved after sintering at 870°C for 15h. The low sintering temperature of newly developed capacitor materials allows a co-firing with pure silver electrodes. The dielectric constant and the temperature stability of the dielectric constant satisfied the X7P requirements, which dielectric properties of were ε25°C≥ 2800, εr/εr 25°C≤±10% (-55~125°C), tanδ≤1.5% (25°C).