Article ID Journal Published Year Pages File Type
1478327 Journal of the European Ceramic Society 2006 4 Pages PDF
Abstract

A new glass-ceramics material called new-glass-ceramics (NGC) that consists of MgAl2O4 crystals (spinel) and highly crystallized Li–Mg–Zn–B–Si–O glass has been developed for microwave or millimeter-wave frequency applications. NGC can be sintered at temperatures below 1000 °C and co-fired with internal copper electrodes that have high electrical conductivity. Its dielectric constant is 7.4 and its Q value is higher than 2000 at 24 GHz. NGC specimens were investigated using X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectrometry (EDX). NGC mainly consists of MgAl2O4, Mg3B2O6, and Li2MgSiO4 crystal phases, which have high Q values. Using NGC, we could make band pass filter (BPF) with the size 3.2 mm × 2.5 mm × 1.3 mm for fixed wireless access (F.W.A.) system at 26 GHz. This BPF can be mounted on circuit board by solder and shows good characteristics.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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