Low-temperature cofiring behavior of ZnTiO₃ dielectrics/NiZnCu ferrite composites

The low-temperature cofiring compatibility between ferrite and dielectric materials is the key issue in the production process of multilayer chip LC filters. In this paper, no camber and cracks multilayer composite samples were obtained by using restricted shrinkage sintering process. The cofiring interface, ionic interdiffusion between constituents and dielectric properties of cofired composites were investigated. The results show that interfacial reactions occur at the interface, which can strengthen combinations between ferrite layers and dielectric layers. Iron and titanium have a wide diffusion range. Due to their low-firing characteristics and realizable cofiring compatibility, ZnTiO₃ dielectrics/NiZnCu hexagonal ferrite can serve as the promising medium materials in the multilayer LC filter.