Piezoelectric component and method for the manufacture thereof
AssigneesSiemens Aktiengesellschaft, Epcos AG
InventorsCarsten Schuh, Karl Lubitz, Dieter Cramer
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Abstract
A piezoelectric component in the form an actuator having a monolithic multi-layer stack is disclosed. The stack comprises a large active cross sectional area and simultaneously exhibits high arc-over resistance between neighboring electrodes of different polarity. For manufacture, only the surface of the stack via which an electrical contacting of the electrode layers ensues is ground after the sintering of a stack composed of piezo ceramic layers and electrode layers arranged on top of one another.
Claims17
A piezoelectric component comprising:
- two ceramic layers with an electrode layer sandwiched therebetween, each ceramic layer comprising a lateral portion extending laterally beyond the electrode layer with an interspace disposed between the two lateral portions, the interspace accommodating an electrically insulating material.
An injection valve of an internal combustion engine comprising:
- a piezoelectric component comprising two ceramic layers with an electrode layer sandwiched therebetween, each ceramic layer comprising a lateral portion extending laterally beyond the electrode layer with an interspace disposed between the two lateral portions, the interspace accommodating an electrically insulating material.
A piezoelectric component comprising:
- two ceramic layers each comprising lead zirconate titanate with an electrode layer sandwiched therebetween, the electrode layer comprises a substance selected from the group consisting of copper, nickel, palladium and silver, each ceramic layer comprising a lateral portion extending laterally beyond the electrode layer with an interspace disposed between the two lateral surfaces, the interspace accommodating an electrically insulating material comprising a polymer, the interspace and lateral portions of the ceramic layers forming a piezoelectrically active region of the component.
Dependencies are inferred from the claim text.