Study of polarization behavior in BaTiO3-based multilayer ceramic capacitors using AC- and Uni-poling treatment 3 Part similar to 2: Effects of core phase composition

In order to obtain material design guidelines for next-generation multilayer ceramic capacitors (MLCCs) from the viewpoint of polarization behavior, we investigated the changes in polarization behavior with AC-and Uni-poling treatment using (Ba,Ca)(Ti,Zr)O-3-based MLCC samples in which a part of the BaTiO3 in the core was modified with Ca and Zr. Comparisons with DC-aging measurements confirmed that the AC-and Uni-poling treated samples clearly showed a unique phenomenon in which the domain wall of the (Ba,Ca)(Ti,Zr)O-3-based core phase moves faster than that of the BaTiO3-based core phase. AC-and Uni-poling treatments are expected to be useful tools for evaluating the relationship between more detailed microstructure and polarization behavior of dielectric materials.(c) 2022 The Ceramic Society of Japan. All rights reserved.