Preparation and Electrical Properties of CaCu$lt;inf$gt;3$lt;/inf$gt;Ti$lt;inf$gt;4$lt;/inf$gt;O$lt;inf$gt;12$lt;/inf$gt; Thin Ceramic Sheets via Water-based Tape Casting

Thin ceramic sheet of CaCu 3 Ti 4 O 12 has a great significance for preparation of multiplayer ceramic chip capacitors. In this work, a simple plan was made to achieve CaCu 3 Ti 4 O 12 thin ceramic sheets with excellent dielectric properties. Thin ceramic sheets of CaCu 3 Ti 4 O 12 were prepared via water-based tape casting at various sintering temperatures. The CaCu 3 Ti 4 O 12 samples sintered at 1080 exhibit a great performance on dielectric properties with high permittivity ( r =98605) and low dielectric loss (tan=0.028) which are better than those of samples prepared by conventional dry pressing. Meanwhile, the complex impedance spectra were measured to explain the mechanism of special electrical behaviors of CaCu 3 Ti 4 O 12 ceramics. These testing results indicate that the CaCu 3 Ti 4 O 12 ceramics via tape casting exhibits a better performance of giant permittivity and lower dielectric loss than other reports, which provides a possibility for the application of the CaCu 3 Ti 4 O 12 in modern micro-electronics technology.