| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric element in which migration can be prevented in a stress relaxation layer, by lowering the mobility of metal cations or halogen anions, thereby prolonging the time to short-circuit of positive and negative poles.SOLUTION: A laminated piezoelectric element 100 telescoping by application of a voltage includes piezoelectric layers 110 formed of piezoelectric ceramic, internal electrode layers 120 laminated alternately with the piezoelectric layers 110, and a stress relaxation layer 140 formed by calcining a lead titanate paste added with a hardening element for increasing the insulation resistance, and provided in contact with the outer periphery 145 of the element along the same laminate surface as the internal electrode layers 120. |
