Piezoceramic multilayer actuator and method of manufacturing a piezoceramic multilayer actuator

US7948150B2 · kind B2 · utility

Assignees

• Siemens Aktiengesellschaft · DE
• KYOCERA Corporation · JP

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 14, 2008
• Grant date: May 24, 2011
• Expiry date: Sep 19, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/8554

Abstract

A piezoceramic multilayer actuator (10) includes a plurality of green layers, wherein the green layers are to be converted to piezoceramic layers (12) with a piezoceramic material in a subsequent step of heating. A security layer material mixture with a second material (32) and particles (30) embedded in the second material (32) is provided, wherein the particles (30) have a third material different from the first material and different from the second material (32). The security layer material mixture is laminated between two piezoceramic layers (12), thereby forming a green stack. The green stack is heated to a sintering temperature, wherein the green layers are converted to the piezoceramic layers (12), and wherein a chemical reaction of the third material degrades the mechanical connection of the piezoceramic layers (12) by the security layer (20).