Microwave properties and structure of La–Ti–Si–B–O glass-ceramics for applications in GHz electronics

Abstract A dielectric bulk glass-ceramic of the La 2 O 3 –TiO 2 –SiO 2 –B 2 O 3 system is developed which is able to fulfill the requirements for dielectric loading-based mobile communication technologies. It is shown that the given dielectric requirements can be fulfilled by glass-ceramic materials without being dependent on ceramic processing techniques. The material exhibited permittivity values of 20  ɛ r Qf τ f τ f material with a Qf value of 9500 GHz and ɛ r  = 21.4 could be achieved at a ceramming temperature T cer  = 870 °C. The material is aimed to provide an alternative to existing, commercially used sintered ceramic materials. Further focus is laid on the investigation of the dom…