Synthesis and characterization of BaTiO3-coated Ni particles

In this study, we proposed the processing of novel Ni powder coated with a major dielectric material BaTiO3 layer to improve the large sintering shrinkage mismatch between Ni electrode and dielectric materials and the resistance to oxidation of Ni electrode in the co-firing process of multilayer ceramic capacitors (MLCCs). The BaTiO3 coated Ni powders were successfully synthesized by the controlled hydrolysis of Ba–Ti complex alkoxide on the surface of Ni particles treated with NH3. This BaTiO3 coated Ni powder affords the drastically improved resistance to oxidation and sintering matching. In addition, the sintered compact prepared from this powder had sufficient conductivity as an alternative electrode.