Piezoelectric/electrostrictive device

摘要

A piezoelectric/electrostrictive device comprising, on a ceramic-made substrate (12), at least one piezoelectric/electrostrictive layer (24) made of a piezoelectric/electro-strictive ceramic composition and at least one pair of electrodes (26) electrically connected to the piezoelectric/electrostrictive layer, characterized in that the piezoelectric/electrostrictive layer is made of a piezoelectric/electrostrictive ceramic composition containing a PbMg 1/3 Nb 2/3 O 3 -PbZrO 3 -PbTiO 3 system composition wherein part of Pb is substituted with at least one kind selected from Sr and La, as a major component and Ce in an amount of 0.01 to 0.50% by mass in terms of CeO 2 and that the piezoelectric/electrostrictive layer is solidly attached to the substrate directly or via part of the electrodes. The piezoelectric/electrostrictive device is superior in transmission of oscillation between the substrate and the piezoelectric/electrostrictive layer, produces a large displacement, and hardly gives rise to dielectric breakdown or short circuit.