Coating of Crystalline BaTiO3 Layer on Ni Nanoparticles for Multilayer Ceramic Capacitor Electrode

The base‐metal electrode (BME) is widely applied in multilayer ceramic capacitors (MLCCs) to replace the Pd/Ag electrode, whereas the oxidation and low shrinkage temperature during sintering is difficult to be resolved in nanosized electrode powders. Herein, a facile two‐step route for the fabrication of the crystalline BaTiO 3 (BT) layer on Ni nanoparticles is developed. The amorphous BT layer is first coated on Ni nanoparticles by a normal precipitation method. Then, the as‐prepared Ni@BT powders are hydrothermally treated at alkaline conditions to facilitate the crystallization of the coating layer. Due to the dense and uniform crystalline BT layer, the Ni@BT powders show significantly enhanced sintering and antioxidation performance, which provides a high‐performance electrode for BME MLCC.