 Like the similar quartz crystal, they are used in oscillators for purposes such as generating the clock signal used to control timing in computers and other digital logic devices.Ceramic resonators are made of high-stability piezoelectric ceramics, generally lead zirconium titanate (PZT) which functions as a mechanical resonator.In operation, mechanical vibrations induce an oscillating voltage in the attached electrodes due to the piezoelectricity of the material.