Fabrication of lead-based MLC by alternative lamination of 2 kinds of thin sheets with different compositions

The authors describe a novel type of composite structure for a multilayer ceramic capacitor (MLC) with a broad temperature dependence of capacitance. The composites were composed of two kinds of dielectric layers stacked alternately, and both dielectric layers, L-layer and the H-layer were composed of lead-based relaxor materials with different Curie points of -35°C (L-layer) and 120°C (H-layer). The dielectric properties and microstructure of the composite MLC are discussed, focusing on shrinkage of the dielectric layer and diffusion between the L- and H-layers in the firing process