Piezoelectric component comprising a security layer and an infiltration barrier and a method for the production thereof

US8264125B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Michael Denzler · Regensburg, DE
• Christoph Hamann · Tauberbischofsheim, DE
• Harald Kastl · Wolfsberg, AT
• Stefan Kohn · Hohenburg, DE
• Maximilian Kronberger · Regensburg, DE
• Christian Reichinger · Alsdorf, DE
• Carsten Schuh · Baldham, DE
• Claus Zumstrull · Regenstauf, DE

Key dates

• Filing date: Mar 26, 2008
• Grant date: Sep 11, 2012
• Expiry date: May 1, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/42

Abstract

A piezoelectric component with a monolithic stack, has electrode layers and piezoceramic layers arranged alternately one on top of the other, the piezoceramic layers have a piezoceramic, and having at least one porous security layer arranged in the stack for the formation of a crack if mechanical overload of the stack should occur. The piezoelectric component has an infiltration barrier arranged between the security layer and a lateral surface section of the stack for suppressing the penetration of a foreign substance into the security layer. The piezoelectric component can be as a piezoactuator for controlling a valve, particularly a valve of an internal combustion engine.