Electrical properties and distortion characteristics of MLCCs with composite dielectric material

The electrical properties and distortion characteristics of multilayer ceramic capacitors (MLCCs) with composite dielectric material, which consisted of ferroelectric and paraelectric phases were studied. In composite dielectrics, BaTiO₃ (BTO) was used for the ferroelectric phase, while SrTiO3 (STO) and CaTiO₃ · CTO· · were used for the paraelectric phases. The dielectric ceramics with composite structure of MLCC were prepared with these perovskite grains and additives. The temperature dependence of dielectric constant of the MLCC could be controlled by the volume ratio of ferroelectric and paraelectric phases. The distortion characteristic of MLCC with composite structure was smaller than that of BTO.