Nickel-molybdenum-doped lead zirconate titanate, method for the production of a piezoceramic component using said lead zirconate titanate, and use of the piezoceramic component

US8021568B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Francois Bamiere · Mannheim, DE
• Katrin Benkert · Birkenfeld, DE
• Stefan Denneler · Birkenfeld, DE
• Morgane Radanielina · Strasbourg, FR
• Carsten Schuh · Baldham, DE

Key dates

• Filing date: Dec 18, 2006
• Grant date: Sep 20, 2011
• Expiry date: Jul 21, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/786
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A piezoceramic composition of a calculated empirical formula Pb1-aREbAEc[ZrxTiy(NinMom)z]O3, wherein RE represents a rare earth metal having a rare earth metal content b, AE represents an alkaline earth metal having an alkaline earth metal content c, nickel is provided with a nickel content n.z, and molybdenum is provided with a molybdenum content m.z. Furthermore, the following correlations apply: a<1; 0=b=0.15; 0=c=0.5; n>0; m>0; 0.1=n/m=5; x>0; y>0; z>0, and x+y+z=1. In a method for producing a piezoceramic component a) a green ceramic member containing the piezoceramic composition is supplied; and b) the green member is subjected to a thermal treatment such that the piezoceramic material of the component is produced from the piezoceramic composition. The thermal treatment encompasses calcining and/or sintering of the piezoceramic composition. The piezoceramic composition is compressed below 1000° C., thus allowing metals melting at a lower temperature to be sintered along with the piezoceramic composition.