Electrical Properties of BaTiO_3-Based Multilayer Ceramic Capacitors Sintered with Plasma-Treated Glass Powder

摘要

The influence of glass power morphology on the electrical and microstructural properties of BaTiCvbased multilayer ceramic capacitors (MLCCs) was investigated to enhance the reliability of MLCCs. For a sintering additive, glass particles of different sizes and shapes were prepared by jet-milling and RF plasma treatment. Plasma treatment decreased the glass particle size and transformed the irregular shape of glass particles into homogeneous spherical shapes. It was found that MLCCs sintered with plasma-treated glass powder have a more homogeneous microstructure, a clear core-shell structure, a more stable capacitance against voltage and temperature changes, and a higher degradation resistance. It is inferred that nanosized spherical glass powder prepared by plasma treatment helps so-called magic dopants such as rare-earth elements to be distributed homogeneously around the BaTiO_3 particles.