MULTILAYER PIEZOELECTRIC DEVICES BASED ON PZT

A PZT 53/47 was obtained by a modified chemical route. Small-particle- size powders were allowed to obtain high solid content, non-aqueous sl ips with Newtonian behaviour. The use of both the tape-casting techniq ue and the common multilayer ceramic fabrication process led to a high -density multilayer ceramic body without cracks or delaminations, and a homogeneous microstructure. The architecture of multilayer piezoelec trics has an important effect on the clamping of resonance modes, part icularly on planar modes, by modifying the nature of the electrode and the effect of the polarization procedure. Th is fact is corroborated by the dielectric and piezoelectric properties measured.