Piezoceramic multilayer actuator and method of manufacturing a piezoceramic multilayer actuator

US7843114B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Bernhard Döllgast · Wolfsberg, AT
• Masahiro Inagaki · Kariya, JP
• Harald Kastl · Wolfsberg, AT
• Atsushi Ochi · Otsu, JP
• Takami Sakamoto · Kirishima, JP
• Carsten Schuh · Baldham, DE

Key dates

• Filing date: Feb 15, 2008
• Grant date: Nov 30, 2010
• Expiry date: May 21, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/508

Abstract

A piezoceramic multilayer actuator (10) has a plurality of piezoceramic layers (12) and a security layer (20) disposed between two piezoceramic layers (12). The piezoceramic layers (12) have a piezoceramic first material sintered at a sintering temperature. The security layer (20) has a second material (32) and particles (30) at least partially embedded in the second material (32). The particles (30) have a third material different from the first material and different from the second material (32). An adhesion between the third material and the first material is weaker than an adhesion between the second material (32) and the first material.