Abstract
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)O3-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)O3-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.
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