Study on the interdiffusion in base-metal-electrode MLCCs

The co-firing techniques of base-metal-electrode (Ni) and dielectric oxides in reducing atmosphere were widely studied by many researchers. In this paper, the metal-oxide interface in BME-multilayer ceramic capacitors (MLCCs) have been investigated using AES, STEM, EDX, and HRTEM. It was found that the element inter-diffusion took place along the metal-dielectric layer interface and nickel element migration towards the dielectric ceramic dominated this process. One reactive co-firing model was proposed according to the experiment results, and the influence of the element inter-diffusion through the phase boundary on the component performances was discussed as well.