Development of fine-grained dielectric ceramics using hydrothermal method

Abstract

The dielectric ceramics used in multilayer ceramic capacitors (MLCCs) require not only a high dielectric permittivity but also a high dielectric breakdown strength, which is achieved by precisely controlling the microstructure. The hydrothermal method, which is one of the liquid-phase synthesis methods, is effective at synthesizing well-dispersed dielectric particles with a small particle size, which can be sintered to obtain dense and fine-grained dielectric ceramics. This paper presents our recent attempts to develop new dielectric ceramics using the hydrothermal method, focusing on bismuth potassium titanate-based materials.