Co-Firing Behavior and Interfacial Structure of BaO–TiO₂–B₂O₃–SiO₂ Glass–Ceramics/NiCuZn Ferrite Composites

Abstract

This paper presents the co-firing behavior and interfacial structure of BaO–TiO₂–B₂O₃–SiO₂ glass–ceramics/NiCuZn ferrite multi-layer composites. Several effective methods, such as sandwich stacking structure and sintering shrinkage modification, are proposed to prevent the camber problem due to the mismatched shrinkage during sintering process to fabricate high-frequency chip inductors that are composite by NiCuZn ferrite and dielectric glass ceramic.

Keywords:

• Glass–ceramic
• Inductor
• Interfaces
• Lamination
• LTCC (low-temperature co-fired ceramics)
• Microstructure
• Multi-layered chip
• Multi-layers
• Residual stresses
• Sintering shrinkage
• Tape casting
• Thermal expansion coefficients
• Thermo-mechanical analysis

ACKNOWLEDGMENTS

This work was supported by the Ministry of Sciences and Technology of China through a High-Tech R&D Program (863 Program) in the form of a grant numbered as 2003AA32G030, and also a Key Based Research Program (973 Program) as a grant with the number as 2002CB613306.