Effect of Manganese Oxide Additive on the Dielectric Properties of Mixed-Sintering Ceramics

The influence of internal electrode material on the sintering of mixed-sintering ceramics and the effect of MnO₂ additive on improving their dielectric properties were investigated for their application as multilayer ceramic capacitors. The resistivities of mixed-sintering ceramic pellets sintered with Ag-Pd electrode material decreased remarkably because of the expulsion of component elements during sintering. A small amount of MnO₂ additive improved the resistivities. Extended X-ray absorption fine-structure analysis showed that MnO₂ exists in the grain boundaries and compensates for the electrical valence of the expelled elements.