Interfacial behaviour between Bi1.5ZnNb1.5O7·0.02V2O5 and Ag

The interfacial behavior between Bi1.5ZnNb1.5O7·0.02V2O5 (BZN-V) dielectric and silver was investigated by using X-ray diffractometer, scanning electronic microscopy, and electronic probe microanalyzer (EPMA). No new crystalline phase was found after firing the mixture of BZN-V and silver powder at 850 °C for 1 h. However, silver migration was observed when BZN-V was cofired with a silver electrode under the same condition. A diffusion distance of 620 μm was measured by EPMA. A eutectic reaction between silver and V2O5 is proposed for the mechanism of the silver migration.