Effects of additives on the sintering behavior of the Ni internal electrode of BaTiO/sub 3/-based multilayer ceramic capacitors

摘要

The effects of additives on the sintering behavior of the Ni internal electrode of BaTiO/sub 3/-based multilayer ceramic capacitors was investigated. The shrinkage and relative density of the Ni disk were measured at various temperatures between 800/spl deg/C and 1300/spl deg/C. The shrinkage of the Ni disk was dependent on the amount of additives. The relative density was as high as 98% after sintering at 1300/spl deg/C, regardless of the amount of additives. The microstructures of the polished surface of the cross section and the surface of the fractured section of MLC were observed using a scanning electron microscope (SEM). The shrinkage ratios for the dielectric and the internal electrode were calculated from their thickness changes. The coating ratio of the internal electrode on the dielectric surface was also calculated.