Bismuth-based pyrochlore dielectric ceramics possess good microwave dielectric properties and have potential application as multilayer microwave dielectric components. The electric field tunability of the dielectric constants of this Bismuth-based pyrochlore family also make them potentially useful as frequency agile RF/microwave components. To date, however, the relatively poor temperature-stability characteristics of the dielectric properties of these Bismuth-based pyrochlore ceramics is a significant limitation to their widespread use. As part of an ongoing ARC-funded project, we have developed a method to tune the temperature coefficient of capacitance of these promising bismuth-based pyrochlore ceramics to a close to zero value without significant deterioration of their original dielectric properties. A provisional patent based on this method has been filed.