Interfacial reaction and co-firing behavior between Ni–Zn–Cu ferrite/Al₂O₃–SiO₂–B₂O₃ glass-ceramic

Abstract

This paper presents the co-firing behavior and interfacial structure of Ni–Zn–Cu ferrite/Al₂O₃–SiO₂–B₂O₃ glass-ceramic composites. An effective multilayered structure is proposed to prevent the camber and crack problem due to the shrinkage behavior and thermal expansion coefficient difference during the sintering process. Bi₂O₃ not only plays a role as a sintering aid to reduce the sintering temperature of Ni–Zn–Cu ferrite but it also diffuses into Al₂O₃–SiO₂–B₂O₃ glass-ceramic forming a stronger bonding at the interface after sintering.