Adjustment of dielectric properties of glass ceramic crystallization

Miniaturization and micro integration play an important role in communicati on technologies. For higher degrees of integration in microwave application s new dielectric materials with sintering temperatures below 900 degreesC, variable dielectric permittivities epsilon (r) > 20 and low dielectric loss es tan delta < 2.10(-3) are required. A glass ceramic composite that unites these properties is introduced. Mathematical prediction and the possibilit y of fine tuning of the resulting properties are given. Parameters for this are the choice of initial composition of the glass and the ceramic compone nt and the sintering temperature.