Uniform Coating Of Batio_3-Dy_2O_3-Sio_2 Compound Nano Layer On Ni Particles For MLCC Electrode

摘要

Uniform coating of nanometer-scale BaTiO_3-Dy_2O_3-SiO_2 layers on spherical Ni particles are achieved by controlled hydrolysis of tetrabutyl titanate (TBT), hydrothermal reaction with Ba (OH)_2, and co-precipitation of tetraethylorthosilicate (TEOS) and Dy(NO_3)_3. The composition of the coating layer is similar to rare earth oxide-silica-doped BaTiO_3, which is the main component of dielectric layer for base metal electrode (BME) multilayer ceramic capacitors (Mlccs). After coating, the shrinkage onset temperature of Ni particles is significantly increased. After sintered to pellets, the electrode has good electrical conductivity. This electrode material has good compatibility with rare earth oxide and silica-doped BaTiO_3 dielectric materials, and could serve as promising candidate for application in the next generation BME-Mlccs.