A study on co-firing between Zn0.9Mg0.1TiO3 and ZnO-based multilayer varistor

摘要: Abstract A semi-conducting ZnO-based multilayer varistor (MLV) is cofired with a passivation layer Zn 0.9 Mg 0.1 TiO 3 (ZMT) composition to prevent MLV from over-nickel coating during nickel plating. The cofiring results show that no de-lamination between ZMT and ZnO can be found, suggesting good co-firing compatibility though the anisotropic densification of noted. However, microstructure electrical properties based greatly influenced since MLV. Reduction grain size 5.2 3.7 μm presumably attributed constraining sintering by observed after cofring ZMT. Simultaneously, reduction covered in decrease capacitance an increase breakdown voltage. On other hand, non-linear coefficient leakage current are as well. associated change slope I – V curve for due formation 2 4 phase, which resulted diffusion titanium ion into matrix co-firing.