Abstract
The influence of Nb2O5 on the microstructure and dielectric properties, including temperature dependence of permittivity, dielectric loss, and Curie temperature, has been investigated on BaTiO3–Bi0.5Na0.5TiO3 (abbreviated as BBT) ceramics. Experiments reveal that incorporation of a proper content of Nb2O5 in BBT ceramics can control the grain growth, reduce the dielectric loss, shift the Curie temperature to higher temperatures and significantly improve temperature characteristics of the BaTiO3–Bi0.5Na0.5TiO3 ceramics. As a result, a novel X10R material is developed in the system, which is very promising for practical use in X10R multilayer ceramic capacitors. With the addition of 2.0 wt% Nb2O5, the ceramics sintered at 1,150 °C showed favorable dielectric properties at 25 °C (er = 1,730, tanδ = 1.39 × 10−2, and TCC = 12.0 %).
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