PIEZOELECTRIC/ELECTROSTRICTIVE ELEMENT

摘要

In the manufacture of a laminated piezoelectric/electrostrictive element by lamination of a piezoelectric/electrostrictive film and an electrode film containing either platinum or an alloy composed mainly of platinum and having a thickness of 2.0 μm or less, both or either one of yttrium oxide (Y2O3) and cerium oxide (CeO2) is added to the electrode film or the piezoelectric/electrostrictive film, and the electrode film and the piezoelectric/electrostrictive film are fired simultaneously. This simultaneously achieves a reduced thickness and improved thermal resistance of the electrode film and a reduced change in piezoelectric/electrostrictive properties with time, thereby producing a piezoelectric/electrostrictive element with good initial piezoelectric/electrostrictive properties and with a small change in the piezoelectridelectrostrictive properties with time.

主权项

1. A laminated piezoelectric/electrostrictive element comprising:
an electrode film being a sintered body of either platinum or an alloy composed mainly of platinum and having a thickness of 2.0 μm or less; and a piezoelectric/electrostrictive film, directly contacting said electrode film and comprising a sintered body of a piezoelectric/electrostrictive material including 0.1 to 0.5 part by weight of calcium oxide to 100 parts by weight of platinum contained in said electrode film and containing 0.2 to 3.0 parts by mol of cerium oxide to 1 part by mol of calcium oxide.