| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated piezoelectric element which is capable of preventing external electrodes from being disconnected from the internal electrodes and superior in durability even when it operates continuously under a high pressure in a high electric field for a long term, and to provide an injection device. SOLUTION: The laminated piezoelectric element is equipped with a pillar-shaped laminate 1a composed of piezoelectric materials 1 and internal electrodes 2 which are alternately laminated, and a pair of external electrodes 4 which are each provided on the sides of the laminate 1a and where the internal electrodes 2 are alternately connected. A projecting conductive terminal 5 protruding from the side of the pillar-shaped laminate 1a is provided to every other end of the internal electrodes 2, the projecting conductive terminals 5 are embedded in the external electrodes 4 containing conductive material and glass, and the external electrode 4 has a void of 30 to 70%. COPYRIGHT: (C)2004,JPO
|
