Effect of silver addition on the dielectric properties of barium titanate based low temperature processed capacitors

Effects of silver addition on microstructure and electrical properties of barium titanate ceramics

“…According to this model, the increase in dielectric permittivity can be understood as the conducting particle apparently shortening the electrode distance, thereby increasing the effective electric field in the dielectric phase [14]. The relative permittivity can also be estimated by using a percolation law [22] as…”

“…Chen et al [12] studied the effect of silver on the sintering and grain-growth behavior of barium titanate and determined the solubility of silver in barium titanate. Chen et al [13] and Halder et al [14] respectively investigated effects of silver addition on dielectric properties of barium titanate-based X7R and Z5U ceramics. However, according to the percolation theory, when the volume fraction of metal close to the percolation limit, conductivity of composites also increases significantly, leading to weakening of resistivity property, which is not favorable for MLCC materials.…”

Sintering and electrical properties of Cu-particle-dispersed (Na,K,Li)NbO3

“…The increase in dielectric constant could be ascribed to effective dielectric fields developed between Cu particles dispersed in NKLN matrix [21]. With increasing Cu concentration the conducting particles apparently shorten the electrode distance, thereby increasing the effective electric field in the dielectric NKLN phase [22]. Fig.…”

Preparation and characterization of monodisperse Ag nanoparticles doped barium titanate ceramics

“…Finally, the ceramic doped with 20.0 mol% monodisperse Ag nanoparticles has the maximum relative density. The reason can be explained as follows: first, using BaTiO 3 nanopowders as the raw material, metallic silver [14], Ag 2 O, or AgNO 3 [4] doping is not homogeneous, while monodisperse Ag nanoparticles can easily distribute in BaTiO 3 ceramic matrix to form Ag dispersed BaTiO 3 ceramic composites; second, because the density of silver (10.5) is higher than that (6.01) of barium titanate greatly, when the concentration of monodisperse Ag nanoparticles is >5.0 mol%, the relative density of the ceramics increases as the content of monodisperse Ag nanoparticles increases. These two reasons can both improve the density of ceramics.…”